dci.c

/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file PHY/LTE_TRANSPORT/dci.c
* \brief Implements PDCCH physical channel TX/RX procedures (36.211) and DCI encoding/decoding (36.212/36.213). Current LTE compliance V8.6 2009-03.
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#ifdef USER_MODE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
#include "SIMULATION/TOOLS/defs.h" // for taus 
#include "PHY/sse_intrin.h"

#include "assertions.h" 
#include "T.h"
#include "UTIL/LOG/log.h"

//#define DEBUG_DCI_ENCODING 1
//#define DEBUG_DCI_DECODING 1
//#define DEBUG_PHY

//#undef ALL_AGGREGATION

//extern uint16_t phich_reg[MAX_NUM_PHICH_GROUPS][3];
//extern uint16_t pcfich_reg[4];

uint32_t check_phich_reg(LTE_DL_FRAME_PARMS *frame_parms,uint32_t kprime,uint8_t lprime,uint8_t mi)
{

  uint16_t i;
  uint16_t Ngroup_PHICH = (frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)/48;
  uint16_t mprime;
  uint16_t *pcfich_reg = frame_parms->pcfich_reg;

  if ((lprime>0) && (frame_parms->Ncp==0) )
    return(0);

  //  printf("check_phich_reg : mi %d\n",mi);

  // compute REG based on symbol
  if ((lprime == 0)||
      ((lprime==1)&&(frame_parms->nb_antenna_ports_eNB == 4)))
    mprime = kprime/6;
  else
    mprime = kprime>>2;

  // check if PCFICH uses mprime
  if ((lprime==0) &&
      ((mprime == pcfich_reg[0]) ||
       (mprime == pcfich_reg[1]) ||
       (mprime == pcfich_reg[2]) ||
       (mprime == pcfich_reg[3]))) {
#ifdef DEBUG_DCI_ENCODING
    printf("[PHY] REG %d allocated to PCFICH\n",mprime);
#endif
    return(1);
  }

  // handle Special subframe case for TDD !!!

  //  printf("Checking phich_reg %d\n",mprime);
  if (mi > 0) {
    if (((frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)%48) > 0)
      Ngroup_PHICH++;

    if (frame_parms->Ncp == 1) {
      Ngroup_PHICH<<=1;
    }



    for (i=0; i<Ngroup_PHICH; i++) {
      if ((mprime == frame_parms->phich_reg[i][0]) ||
          (mprime == frame_parms->phich_reg[i][1]) ||
          (mprime == frame_parms->phich_reg[i][2]))  {
#ifdef DEBUG_DCI_ENCODING
        printf("[PHY] REG %d (lprime %d) allocated to PHICH\n",mprime,lprime);
#endif
        return(1);
      }
    }
  }

  return(0);
}

uint16_t extract_crc(uint8_t *dci,uint8_t dci_len)
{

  uint16_t crc16;
  //  uint8_t i;

  /*
  uint8_t crc;
  crc = ((uint16_t *)dci)[DCI_LENGTH>>4];
  printf("crc1: %x, shift %d (DCI_LENGTH %d)\n",crc,DCI_LENGTH&0xf,DCI_LENGTH);
  crc = (crc>>(DCI_LENGTH&0xf));
  // clear crc bits
  ((uint16_t *)dci)[DCI_LENGTH>>4] &= (0xffff>>(16-(DCI_LENGTH&0xf)));
  printf("crc2: %x, dci0 %x\n",crc,((int16_t *)dci)[DCI_LENGTH>>4]);
  crc |= (((uint16_t *)dci)[1+(DCI_LENGTH>>4)])<<(16-(DCI_LENGTH&0xf));
  // clear crc bits
  (((uint16_t *)dci)[1+(DCI_LENGTH>>4)]) = 0;
  printf("extract_crc: crc %x\n",crc);
  */
#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY,"dci_crc (%x,%x,%x), dci_len&0x7=%d\n",dci[dci_len>>3],dci[1+(dci_len>>3)],dci[2+(dci_len>>3)],
      dci_len&0x7);
#endif

  if ((dci_len&0x7) > 0) {
    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)]<<(dci_len&0x7) | dci[2+(dci_len>>3)]>>(8-(dci_len&0x7));
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)]<<(dci_len&0x7) | dci[1+(dci_len>>3)]>>(8-(dci_len&0x7));
  } else {
    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)];
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)];
  }

#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY,"dci_crc =>%x\n",crc16);
#endif

  //  dci[(dci_len>>3)]&=(0xffff<<(dci_len&0xf));
  //  dci[(dci_len>>3)+1] = 0;
  //  dci[(dci_len>>3)+2] = 0;
  return((uint16_t)crc16);
  
}



static uint8_t d[3*(MAX_DCI_SIZE_BITS + 16) + 96];
static uint8_t w[3*3*(MAX_DCI_SIZE_BITS+16)];

void dci_encoding(uint8_t *a,
                  uint8_t A,
                  uint16_t E,
                  uint8_t *e,
                  uint16_t rnti)
{


  uint8_t D = (A + 16);
  uint32_t RCC;

#ifdef DEBUG_DCI_ENCODING
  int32_t i;
#endif
  // encode dci

#ifdef DEBUG_DCI_ENCODING
  printf("Doing DCI encoding for %d bits, e %p, rnti %x\n",A,e,rnti);
#endif

  memset((void *)d,LTE_NULL,96);

  ccodelte_encode(A,2,a,d+96,rnti);

#ifdef DEBUG_DCI_ENCODING

  for (i=0; i<16+A; i++)
    printf("%d : (%d,%d,%d)\n",i,*(d+96+(3*i)),*(d+97+(3*i)),*(d+98+(3*i)));

#endif

#ifdef DEBUG_DCI_ENCODING
  printf("Doing DCI interleaving for %d coded bits, e %p\n",D*3,e);
#endif
  RCC = sub_block_interleaving_cc(D,d+96,w);

#ifdef DEBUG_DCI_ENCODING
  printf("Doing DCI rate matching for %d channel bits, RCC %d, e %p\n",E,RCC,e);
#endif
  lte_rate_matching_cc(RCC,E,w,e);


}


uint8_t *generate_dci0(uint8_t *dci,
                       uint8_t *e,
                       uint8_t DCI_LENGTH,
                       uint8_t aggregation_level,
		       uint8_r bitsperCCE,
                       uint16_t rnti)
{

  uint16_t coded_bits;
  uint8_t dci_flip[8];

  AssertFatal((aggregation_level==1) || 
	      (aggregation_level==2) || 
	      (aggregation_level==4) || 
	      (aggregation_level==8) 
#ifdef Rel14 // Added for EPDCCH/MPDCCH
	      ||
	      (aggregation_level==16) ||
	      (aggregation_level==24) ||
	      (aggregation_level==32)
#endif
	      ,
	      "generate_dci FATAL, illegal aggregation_level %d\n",aggregation_level);
  

  coded_bits = bitsperCCE * aggregation_level;

  /*

  #ifdef DEBUG_DCI_ENCODING
  for (i=0;i<1+((DCI_LENGTH+16)/8);i++)
    printf("i %d : %x\n",i,dci[i]);
  #endif
  */
  if (DCI_LENGTH<=32) {
    dci_flip[0] = dci[3];
    dci_flip[1] = dci[2];
    dci_flip[2] = dci[1];
    dci_flip[3] = dci[0];
  } else {
    dci_flip[0] = dci[7];
    dci_flip[1] = dci[6];
    dci_flip[2] = dci[5];
    dci_flip[3] = dci[4];
    dci_flip[4] = dci[3];
    dci_flip[5] = dci[2];
    dci_flip[6] = dci[1];
    dci_flip[7] = dci[0];
#ifdef DEBUG_DCI_ENCODING
    printf("DCI => %x,%x,%x,%x,%x,%x,%x,%x\n",
        dci_flip[0],dci_flip[1],dci_flip[2],dci_flip[3],
        dci_flip[4],dci_flip[5],dci_flip[6],dci_flip[7]);
#endif
  }

  dci_encoding(dci_flip,DCI_LENGTH,coded_bits,e,rnti);

  return(e+coded_bits);
}

uint32_t Y;

#define CCEBITS 72
#define CCEPERSYMBOL 33  // This is for 1200 RE
#define CCEPERSYMBOL0 22  // This is for 1200 RE
#define DCI_BITS_MAX ((2*CCEPERSYMBOL+CCEPERSYMBOL0)*CCEBITS)
#define Msymb (DCI_BITS_MAX/2)
//#define Mquad (Msymb/4)

static uint32_t bitrev_cc_dci[32] = {1,17,9,25,5,21,13,29,3,19,11,27,7,23,15,31,0,16,8,24,4,20,12,28,2,18,10,26,6,22,14,30};
static int32_t wtemp[2][Msymb];

void pdcch_interleaving(LTE_DL_FRAME_PARMS *frame_parms,int32_t **z, int32_t **wbar,uint8_t n_symbols_pdcch,uint8_t mi)
{

  int32_t *wptr,*wptr2,*zptr;
  uint32_t Mquad = get_nquad(n_symbols_pdcch,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k,a;
#ifdef RM_DEBUG
  int32_t nulled=0;
#endif

  //  printf("[PHY] PDCCH Interleaving Mquad %d (Nsymb %d)\n",Mquad,n_symbols_pdcch);
  if ((Mquad&0x1f) > 0)
    RCC++;

  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;

  for (col=0; col<32; col++) {
    index = bitrev_cc_dci[col];

    for (row=0; row<RCC; row++) {
      //printf("col %d, index %d, row %d\n",col,index,row);
      if (index>=ND) {
        for (a=0; a<frame_parms->nb_antenna_ports_eNB; a++) {
          //printf("a %d k %d\n",a,k);

          wptr = &wtemp[a][k<<2];
          zptr = &z[a][(index-ND)<<2];

          //printf("wptr=%p, zptr=%p\n",wptr,zptr);

          wptr[0] = zptr[0];
          wptr[1] = zptr[1];
          wptr[2] = zptr[2];
          wptr[3] = zptr[3];
        }

        k++;
      }

      index+=32;
    }
  }

  // permutation
  for (i=0; i<Mquad; i++) {

    for (a=0; a<frame_parms->nb_antenna_ports_eNB; a++) {

      //wptr  = &wtemp[a][i<<2];
      //wptr2 = &wbar[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr = &wtemp[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr2 = &wbar[a][i<<2];
      wptr2[0] = wptr[0];
      wptr2[1] = wptr[1];
      wptr2[2] = wptr[2];
      wptr2[3] = wptr[3];
    }
  }
}

void pdcch_demapping(uint16_t *llr,uint16_t *wbar,LTE_DL_FRAME_PARMS *frame_parms,uint8_t num_pdcch_symbols,uint8_t mi)
{

  uint32_t i, lprime;
  uint16_t kprime,kprime_mod12,mprime,symbol_offset,tti_offset,tti_offset0;
  int16_t re_offset,re_offset0;

  // This is the REG allocation algorithm from 36-211, second part of Section 6.8.5

  int Msymb2;

  switch (frame_parms->N_RB_DL) {
  case 100:
    Msymb2 = Msymb;
    break;

  case 75:
    Msymb2 = 3*Msymb/4;
    break;

  case 50:
    Msymb2 = Msymb>>1;
    break;

  case 25:
    Msymb2 = Msymb>>2;
    break;

  case 15:
    Msymb2 = Msymb*15/100;
    break;

  case 6:
    Msymb2 = Msymb*6/100;
    break;

  default:
    Msymb2 = Msymb>>2;
    break;
  }

  mprime=0;


  re_offset = 0;
  re_offset0 = 0; // counter for symbol with pilots (extracted outside!)

  for (kprime=0; kprime<frame_parms->N_RB_DL*12; kprime++) {
    for (lprime=0; lprime<num_pdcch_symbols; lprime++) {

      symbol_offset = (uint32_t)frame_parms->N_RB_DL*12*lprime;

      tti_offset = symbol_offset + re_offset;
      tti_offset0 = symbol_offset + re_offset0;

      // if REG is allocated to PHICH, skip it
      if (check_phich_reg(frame_parms,kprime,lprime,mi) == 1) {
	//        printf("dci_demapping : skipping REG %d (RE %d)\n",(lprime==0)?kprime/6 : kprime>>2,kprime);
	if ((lprime == 0)&&((kprime%6)==0))
	  re_offset0+=4;
      } else { // not allocated to PHICH/PCFICH
	//        printf("dci_demapping: REG %d\n",(lprime==0)?kprime/6 : kprime>>2);
        if (lprime == 0) {
          // first symbol, or second symbol+4 TX antennas skip pilots
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 6)) {
            // kprime represents REG

            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset0+i];
#ifdef DEBUG_DCI_DECODING
//              LOG_I(PHY,"PDCCH demapping mprime %d.%d <= llr %d (symbol %d re %d) -> (%d,%d)\n",mprime/4,i,tti_offset0+i,symbol_offset,re_offset0,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
#endif
              mprime++;
              re_offset0++;
            }
          }
        } else if ((lprime==1)&&(frame_parms->nb_antenna_ports_eNB == 4)) {
          // LATER!!!!
        } else { // no pilots in this symbol
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 4) || (kprime_mod12 == 8)) {
            // kprime represents REG
            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset+i];
#ifdef DEBUG_DCI_DECODING
//              LOG_I(PHY,"PDCCH demapping mprime %d.%d <= llr %d (symbol %d re %d) -> (%d,%d)\n",mprime/4,i,tti_offset+i,symbol_offset,re_offset+i,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
#endif
              mprime++;
            }
          }  // is representative
        } // no pilots case
      } // not allocated to PHICH/PCFICH

      // Stop when all REGs are copied in
      if (mprime>=Msymb2)
        break;
    } //lprime loop

    re_offset++;

  } // kprime loop
}

static uint16_t wtemp_rx[Msymb];
void pdcch_deinterleaving(LTE_DL_FRAME_PARMS *frame_parms,uint16_t *z, uint16_t *wbar,uint8_t number_pdcch_symbols,uint8_t mi)
{

  uint16_t *wptr,*zptr,*wptr2;

  uint16_t Mquad=get_nquad(number_pdcch_symbols,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k;


  //  printf("Mquad %d, RCC %d\n",Mquad,RCC);

  AssertFatal(z!=NULL,"dci.c: pdcch_deinterleaving: FATAL z is Null\n");

  // undo permutation
  for (i=0; i<Mquad; i++) {
    wptr = &wtemp_rx[((i+frame_parms->Nid_cell)%Mquad)<<2];
    wptr2 = &wbar[i<<2];

    wptr[0] = wptr2[0];
    wptr[1] = wptr2[1];
    wptr[2] = wptr2[2];
    wptr[3] = wptr2[3];
    /*    
    printf("pdcch_deinterleaving (%p,%p): quad %d (%d) -> (%d,%d %d,%d %d,%d %d,%d)\n",wptr,wptr2,i,(i+frame_parms->Nid_cell)%Mquad,
	   ((char*)wptr2)[0],
	   ((char*)wptr2)[1],
	   ((char*)wptr2)[2],
	   ((char*)wptr2)[3],
	   ((char*)wptr2)[4],
	   ((char*)wptr2)[5],
	   ((char*)wptr2)[6],
	   ((char*)wptr2)[7]);
    */

  }

  if ((Mquad&0x1f) > 0)
    RCC++;

  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;

  for (col=0; col<32; col++) {
    index = bitrev_cc_dci[col];

    for (row=0; row<RCC; row++) {
      //      printf("row %d, index %d, Nd %d\n",row,index,ND);
      if (index>=ND) {



        wptr = &wtemp_rx[k<<2];
        zptr = &z[(index-ND)<<2];

        zptr[0] = wptr[0];
        zptr[1] = wptr[1];
        zptr[2] = wptr[2];
        zptr[3] = wptr[3];

	/*        
        printf("deinterleaving ; k %d, index-Nd %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",k,(index-ND),
               ((int8_t *)wptr)[0],
               ((int8_t *)wptr)[1],
               ((int8_t *)wptr)[2],
               ((int8_t *)wptr)[3],
               ((int8_t *)wptr)[4],
               ((int8_t *)wptr)[5],
               ((int8_t *)wptr)[6],
               ((int8_t *)wptr)[7]);
	*/
        k++;
      }

      index+=32;

    }
  }

  for (i=0; i<Mquad; i++) {
    zptr = &z[i<<2];
    /*    
    printf("deinterleaving ; quad %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",i,
     ((int8_t *)zptr)[0],
     ((int8_t *)zptr)[1],
     ((int8_t *)zptr)[2],
     ((int8_t *)zptr)[3],
     ((int8_t *)zptr)[4],
     ((int8_t *)zptr)[5],
     ((int8_t *)zptr)[6],
     ((int8_t *)zptr)[7]);
    */  
  }

}


int32_t pdcch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                            int32_t **rxdataF_comp,
                            int32_t **rxdataF_comp_i,
                            int32_t **rho_i,
                            int16_t *pdcch_llr16,
                            int16_t *pdcch_llr8in,
                            uint8_t symbol)
{

  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr128;
  int32_t i;
  char *pdcch_llr8;
  int16_t *pdcch_llr;
  pdcch_llr8 = (char *)&pdcch_llr8in[symbol*frame_parms->N_RB_DL*12];
  pdcch_llr = &pdcch_llr16[symbol*frame_parms->N_RB_DL*12];

  //  printf("dlsch_qpsk_qpsk: symbol %d\n",symbol);

  llr128 = (int16_t*)pdcch_llr;

  if (!llr128) {
    printf("dlsch_qpsk_qpsk_llr: llr is null, symbol %d\n",symbol);
    return -1;
  }

  qpsk_qpsk(rxF,
            rxF_i,
            llr128,
            rho,
            frame_parms->N_RB_DL*12);

  //prepare for Viterbi which accepts 8 bit, but prefers 4 bit, soft input.
  for (i=0; i<(frame_parms->N_RB_DL*24); i++) {
    if (*pdcch_llr>7)
      *pdcch_llr8=7;
    else if (*pdcch_llr<-8)
      *pdcch_llr8=-8;
    else
      *pdcch_llr8 = (char)(*pdcch_llr);

    pdcch_llr++;
    pdcch_llr8++;
  }

  return(0);
}


int32_t pdcch_llr(LTE_DL_FRAME_PARMS *frame_parms,
                  int32_t **rxdataF_comp,
                  char *pdcch_llr,
                  uint8_t symbol)
{

  int16_t *rxF= (int16_t*) &rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int32_t i;
  char *pdcch_llr8;

  pdcch_llr8 = &pdcch_llr[2*symbol*frame_parms->N_RB_DL*12];

  if (!pdcch_llr8) {
    printf("pdcch_qpsk_llr: llr is null, symbol %d\n",symbol);
    return(-1);
  }

  //    printf("pdcch qpsk llr for symbol %d (pos %d), llr offset %d\n",symbol,(symbol*frame_parms->N_RB_DL*12),pdcch_llr8-pdcch_llr);

  for (i=0; i<(frame_parms->N_RB_DL*((symbol==0) ? 16 : 24)); i++) {

    if (*rxF>31)
      *pdcch_llr8=31;
    else if (*rxF<-32)
      *pdcch_llr8=-32;
    else
      *pdcch_llr8 = (char)(*rxF);

    //    printf("%d %d => %d\n",i,*rxF,*pdcch_llr8);
    rxF++;
    pdcch_llr8++;
  }

  return(0);

}

//__m128i avg128P;

//compute average channel_level on each (TX,RX) antenna pair
void pdcch_channel_level(int32_t **dl_ch_estimates_ext,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t *avg,
                         uint8_t nb_rb)
{

  int16_t rb;
  uint8_t aatx,aarx;
#if defined(__x86_64__) || defined(__i386__)
  __m128i *dl_ch128;
  __m128i avg128P;
#elif defined(__arm__)
  int16x8_t *dl_ch128;
  int32x4_t *avg128P;
#endif
  for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      //clear average level
#if defined(__x86_64__) || defined(__i386__)
      avg128P = _mm_setzero_si128();
      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][0];
#elif defined(__arm__)

#endif
      for (rb=0; rb<nb_rb; rb++) {

#if defined(__x86_64__) || defined(__i386__)
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[0],dl_ch128[0]));
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[1],dl_ch128[1]));
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[2],dl_ch128[2]));
#elif defined(__arm__)

#endif
        dl_ch128+=3;
        /*
          if (rb==0) {
          print_shorts("dl_ch128",&dl_ch128[0]);
          print_shorts("dl_ch128",&dl_ch128[1]);
          print_shorts("dl_ch128",&dl_ch128[2]);
          }
        */
      }

      DevAssert( nb_rb );
      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128P)[0] +
                             ((int32_t*)&avg128P)[1] +
                             ((int32_t*)&avg128P)[2] +
                             ((int32_t*)&avg128P)[3])/(nb_rb*12);

      //            printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
    }

#if defined(__x86_64__) || defined(__i386__)
  _mm_empty();
  _m_empty();
#endif

}

#if defined(__x86_64) || defined(__i386__)
__m128i mmtmpPD0,mmtmpPD1,mmtmpPD2,mmtmpPD3;
#elif defined(__arm__)

#endif
void pdcch_dual_stream_correlation(LTE_DL_FRAME_PARMS *frame_parms,
                                   uint8_t symbol,
                                   int32_t **dl_ch_estimates_ext,
                                   int32_t **dl_ch_estimates_ext_i,
                                   int32_t **dl_ch_rho_ext,
                                   uint8_t output_shift)
{

  uint16_t rb;
#if defined(__x86_64__) || defined(__i386__)
  __m128i *dl_ch128,*dl_ch128i,*dl_ch_rho128;
#elif defined(__arm__)

#endif
  uint8_t aarx;

  //  printf("dlsch_dual_stream_correlation: symbol %d\n",symbol);


  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

#if defined(__x86_64__) || defined(__i386__)
    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch128i         = (__m128i *)&dl_ch_estimates_ext_i[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_rho128      = (__m128i *)&dl_ch_rho_ext[aarx][symbol*frame_parms->N_RB_DL*12];

#elif defined(__arm__)

#endif

    for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
      // multiply by conjugated channel
#if defined(__x86_64__) || defined(__i386__)
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128i[0]);
      //  print_ints("re",&mmtmpPD0);

      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)&conjugate[0]);
      //  print_ints("im",&mmtmpPD1);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[0]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      //  print_ints("re(shift)",&mmtmpPD0);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      //  print_ints("im(shift)",&mmtmpPD1);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
      //        print_ints("c0",&mmtmpPD2);
      //  print_ints("c1",&mmtmpPD3);
      dl_ch_rho128[0] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);

      //print_shorts("rx:",dl_ch128_2);
      //print_shorts("ch:",dl_ch128);
      //print_shorts("pack:",rho128);

      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128i[1]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[1]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);


      dl_ch_rho128[1] =_mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+1);
      //print_shorts("ch:",dl_ch128+1);
      //print_shorts("pack:",rho128+1);
      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128i[2]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[2]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);

      dl_ch_rho128[2] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+2);
      //print_shorts("ch:",dl_ch128+2);
      //print_shorts("pack:",rho128+2);

      dl_ch128+=3;
      dl_ch128i+=3;
      dl_ch_rho128+=3;


#elif defined(__arm__)

#endif
     }
  }
#if defined(__x86_64__) || defined(__i386__)
  _mm_empty();
  _m_empty();
#endif

}


void pdcch_detection_mrc_i(LTE_DL_FRAME_PARMS *frame_parms,
                           int32_t **rxdataF_comp,
                           int32_t **rxdataF_comp_i,
                           int32_t **rho,
                           int32_t **rho_i,
                           uint8_t symbol)
{

  uint8_t aatx;

#if defined(__x86_64__) || defined(__i386__)
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
#elif defined(__arm__)
  int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
#endif
  int32_t i;

  if (frame_parms->nb_antennas_rx>1) {
    for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++) {
      //if (frame_parms->mode1_flag && (aatx>0)) break;

#if defined(__x86_64__) || defined(__i386__)
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#elif defined(__arm__)
      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#endif
      // MRC on each re of rb on MF output
      for (i=0; i<frame_parms->N_RB_DL*3; i++) {
#if defined(__x86_64__) || defined(__i386__)
        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
#elif defined(__arm__)
        rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
#endif
      }
    }

#if defined(__x86_64__) || defined(__i386__)
    rho128_0 = (__m128i *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (__m128i *) &rho[1][symbol*frame_parms->N_RB_DL*12];
#elif defined(__arm__)
    rho128_0 = (int16x8_t *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (int16x8_t *) &rho[1][symbol*frame_parms->N_RB_DL*12];
#endif
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
#if defined(__x86_64__) || defined(__i386__)
      rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
#elif defined(__arm__)
      rho128_0[i] = vhaddq_s16(rho128_0[i],rho128_1[i]);
#endif
    }

#if defined(__x86_64__) || defined(__i386__)
    rho128_i0 = (__m128i *) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (__m128i *) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i0   = (__m128i *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i1   = (__m128i *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
#elif defined(__arm__)
    rho128_i0 = (int16x8_t*) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (int16x8_t*) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i0   = (int16x8_t *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i1   = (int16x8_t *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];

#endif
    // MRC on each re of rb on MF and rho
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
#if defined(__x86_64__) || defined(__i386__)
      rxdataF_comp128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_i0[i],1),_mm_srai_epi16(rxdataF_comp128_i1[i],1));
      rho128_i0[i]          = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
#elif defined(__arm__)
      rxdataF_comp128_i0[i] = vhaddq_s16(rxdataF_comp128_i0[i],rxdataF_comp128_i1[i]);
      rho128_i0[i]          = vhaddq_s16(rho128_i0[i],rho128_i1[i]);

#endif
    }
  }

#if defined(__x86_64__) || defined(__i386__)
  _mm_empty();
  _m_empty();
#endif
}


void pdcch_extract_rbs_single(int32_t **rxdataF,
                              int32_t **dl_ch_estimates,
                              int32_t **rxdataF_ext,
                              int32_t **dl_ch_estimates_ext,
                              uint8_t symbol,
                              uint32_t high_speed_flag,
                              LTE_DL_FRAME_PARMS *frame_parms)
{


  uint16_t rb,nb_rb=0;
  uint8_t i,j,aarx;
  int32_t *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;


  int nushiftmod3 = frame_parms->nushift%3;
  uint8_t symbol_mod;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY, "extract_rbs_single: symbol_mod %d\n",symbol_mod);
#endif

  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

    if (high_speed_flag == 1)
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
    else
      dl_ch0     = &dl_ch_estimates[aarx][5];

    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];

    if ((frame_parms->N_RB_DL&1) == 0)  { // even number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];

          //dl_ch0++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++) {

            rxF_ext[i]=rxF[i];

          }

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
      }
    } else { // Odd number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
      }

      // Do middle RB (around DC)
      //  printf("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);

      if (symbol_mod==0) {
        j=0;

        for (i=0; i<6; i++) {
          if ((i!=nushiftmod3) &&
              (i!=(nushiftmod3+3))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[i];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          if ((i!=(nushiftmod3+6)) &&
              (i!=(nushiftmod3+9))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[(1+i-6)];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }


        nb_rb++;
        dl_ch0_ext+=8;
        rxF_ext+=8;
        dl_ch0+=12;
        rxF+=7;
        rb++;
      } else {
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          rxF_ext[i]=rxF[i];
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          rxF_ext[i]=rxF[(1+i-6)];
        }


        nb_rb++;
        dl_ch0_ext+=12;
        rxF_ext+=12;
        dl_ch0+=12;
        rxF+=7;
        rb++;
      }

      for (; rb<frame_parms->N_RB_DL; rb++) {
        if (symbol_mod > 0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=(nushiftmod3)) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
      }
    }
  }
}

void pdcch_extract_rbs_dual(int32_t **rxdataF,
                            int32_t **dl_ch_estimates,
                            int32_t **rxdataF_ext,
                            int32_t **dl_ch_estimates_ext,
                            uint8_t symbol,
                            uint32_t high_speed_flag,
                            LTE_DL_FRAME_PARMS *frame_parms)
{


  uint16_t rb,nb_rb=0;
  uint8_t i,aarx,j;
  int32_t *dl_ch0,*dl_ch0_ext,*dl_ch1,*dl_ch1_ext,*rxF,*rxF_ext;
  uint8_t symbol_mod;
  int nushiftmod3 = frame_parms->nushift%3;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY, "extract_rbs_dual: symbol_mod %d\n",symbol_mod);
#endif

  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

    if (high_speed_flag==1) {
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
      dl_ch1     = &dl_ch_estimates[2+aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
    } else {
      dl_ch0     = &dl_ch_estimates[aarx][5];
      dl_ch1     = &dl_ch_estimates[2+aarx][5];
    }

    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
    dl_ch1_ext = &dl_ch_estimates_ext[2+aarx][symbol*(frame_parms->N_RB_DL*12)];

    //    printf("pdcch extract_rbs: rxF_ext pos %d\n",symbol*(frame_parms->N_RB_DL*12));
    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];

    if ((frame_parms->N_RB_DL&1) == 0)  // even number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];
          //    dl_ch0++;
          //dl_ch1++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          /*
            printf("rb %d\n",rb);
            for (i=0;i<12;i++)
            printf("(%d %d)",((int16_t *)dl_ch0)[i<<1],((int16_t*)dl_ch0)[1+(i<<1)]);
            printf("\n");
          */
          for (i=0; i<12; i++) {
            rxF_ext[i]=rxF[i];
            //      printf("%d : (%d,%d)\n",(rxF+(2*i)-&rxdataF[aarx][( (symbol*(frame_parms->ofdm_symbol_size)))*2])/2,
            //  ((int16_t*)&rxF[i<<1])[0],((int16_t*)&rxF[i<<1])[0]);
          }

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                            printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]  =dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;
        }

        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=12;
      }

    else {  // Odd number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

        //  printf("rb %d: %d\n",rb,rxF-&rxdataF[aarx][(symbol*(frame_parms->ofdm_symbol_size))*2]);

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;

        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]=dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;


          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        }
      }

      // Do middle RB (around DC)

      if (symbol_mod > 0) {
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          dl_ch1_ext[i]=dl_ch1[i];
          rxF_ext[i]=rxF[i];
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          dl_ch1_ext[i]=dl_ch1[i];
          rxF_ext[i]=rxF[(1+i)];
        }

        nb_rb++;
        dl_ch0_ext+=12;
        dl_ch1_ext+=12;
        rxF_ext+=12;

        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=7;
        rb++;
      } else {
        j=0;

        for (i=0; i<6; i++) {
          if ((i!=nushiftmod3) &&
              (i!=nushiftmod3+3)) {
            dl_ch0_ext[j]=dl_ch0[i];
            dl_ch1_ext[j]=dl_ch1[i];
            rxF_ext[j++]=rxF[i];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          if ((i!=nushiftmod3+6) &&
              (i!=nushiftmod3+9)) {
            dl_ch0_ext[j]=dl_ch0[i];
            dl_ch1_ext[j]=dl_ch1[i];
            rxF_ext[j++]=rxF[(1+i-6)];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }


        nb_rb++;
        dl_ch0_ext+=8;
        dl_ch1_ext+=8;
        rxF_ext+=8;
        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=7;
        rb++;
      }

      for (; rb<frame_parms->N_RB_DL; rb++) {

        if (symbol_mod>0) {
          //  printf("rb %d: %d\n",rb,rxF-&rxdataF[aarx][(symbol*(frame_parms->ofdm_symbol_size))*2]);
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]=dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        }
      }
    }
  }
}


void pdcch_channel_compensation(int32_t **rxdataF_ext,
                                int32_t **dl_ch_estimates_ext,
                                int32_t **rxdataF_comp,
                                int32_t **rho,
                                LTE_DL_FRAME_PARMS *frame_parms,
                                uint8_t symbol,
                                uint8_t output_shift)
{

  uint16_t rb;
#if defined(__x86_64__) || defined(__i386__)
  __m128i *dl_ch128,*rxdataF128,*rxdataF_comp128;
  __m128i *dl_ch128_2, *rho128;
#elif defined(__arm__)

#endif
  uint8_t aatx,aarx,pilots=0;




#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY, "PDCCH comp: symbol %d\n",symbol);
#endif

  if (symbol==0)
    pilots=1;

  for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++) {
    //if (frame_parms->mode1_flag && aatx>0) break; //if mode1_flag is set then there is only one stream to extract, independent of nb_antenna_ports_eNB

    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

#if defined(__x86_64__) || defined(__i386__)
      dl_ch128          = (__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128   = (__m128i *)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];

#elif defined(__arm__)

#endif

      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

#if defined(__x86_64__) || defined(__i386__)
        // multiply by conjugated channel
        mmtmpPD0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
        //  print_ints("re",&mmtmpPD0);

        // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)&conjugate[0]);
        //  print_ints("im",&mmtmpPD1);
        mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,rxdataF128[0]);
        // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
        //  print_ints("re(shift)",&mmtmpPD0);
        mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
        //  print_ints("im(shift)",&mmtmpPD1);
        mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
        mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
        //        print_ints("c0",&mmtmpPD2);
        //  print_ints("c1",&mmtmpPD3);
        rxdataF_comp128[0] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
        //  print_shorts("rx:",rxdataF128);
        //  print_shorts("ch:",dl_ch128);
        //  print_shorts("pack:",rxdataF_comp128);

        // multiply by conjugated channel
        mmtmpPD0 = _mm_madd_epi16(dl_ch128[1],rxdataF128[1]);
        // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
        mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,rxdataF128[1]);
        // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
        mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
        mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
        mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);

        rxdataF_comp128[1] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);

        //  print_shorts("rx:",rxdataF128+1);
        //  print_shorts("ch:",dl_ch128+1);
        //  print_shorts("pack:",rxdataF_comp128+1);
        // multiply by conjugated channel
        if (pilots == 0) {
          mmtmpPD0 = _mm_madd_epi16(dl_ch128[2],rxdataF128[2]);
          // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
          mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
          mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
          mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
          mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,rxdataF128[2]);
          // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
          mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
          mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
          mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
          mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);

          rxdataF_comp128[2] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
        }

        //  print_shorts("rx:",rxdataF128+2);
        //  print_shorts("ch:",dl_ch128+2);
        //        print_shorts("pack:",rxdataF_comp128+2);

        if (pilots==0) {
          dl_ch128+=3;
          rxdataF128+=3;
          rxdataF_comp128+=3;
        } else {
          dl_ch128+=2;
          rxdataF128+=2;
          rxdataF_comp128+=2;
        }
#elif defined(__arm__)

#endif
      }
    }
  }


  if (rho) {

    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

#if defined(__x86_64__) || defined(__i386__)
      rho128        = (__m128i *)&rho[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128      = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128_2    = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];

#elif defined(__arm__)
      
#endif
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
#if defined(__x86_64__) || defined(__i386__)

        // multiply by conjugated channel
        mmtmpPD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128_2[0]);
        //  print_ints("re",&mmtmpD0);

        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)&conjugate[0]);
        //  print_ints("im",&mmtmpPD1);
        mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128_2[0]);
        // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
        //  print_ints("re(shift)",&mmtmpD0);
        mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
        //  print_ints("im(shift)",&mmtmpD1);
        mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
        mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
        //        print_ints("c0",&mmtmpPD2);
        //  print_ints("c1",&mmtmpPD3);
        rho128[0] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);

        //print_shorts("rx:",dl_ch128_2);
        //print_shorts("ch:",dl_ch128);
        //print_shorts("pack:",rho128);

        // multiply by conjugated channel
        mmtmpPD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128_2[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
        mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128_2[1]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
        mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
        mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
        mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);


        rho128[1] =_mm_packs_epi32(mmtmpPD2,mmtmpPD3);
        //print_shorts("rx:",dl_ch128_2+1);
        //print_shorts("ch:",dl_ch128+1);
        //print_shorts("pack:",rho128+1);
        // multiply by conjugated channel
        mmtmpPD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128_2[2]);
        // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
        mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128_2[2]);
        // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
        mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
        mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
        mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);

        rho128[2] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
        //print_shorts("rx:",dl_ch128_2+2);
        //print_shorts("ch:",dl_ch128+2);
        //print_shorts("pack:",rho128+2);

        dl_ch128+=3;
        dl_ch128_2+=3;
        rho128+=3;

#elif defined(__arm_)


#endif
      }
    }

  }

#if defined(__x86_64__) || defined(__i386__)
  _mm_empty();
  _m_empty();
#endif
}

void pdcch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t **rxdataF_comp,
                         uint8_t symbol)
{

  uint8_t aatx;

#if defined(__x86_64__) || defined(__i386__)
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1;
#elif defined(__arm__)
 int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1;
#endif
  int32_t i;

  if (frame_parms->nb_antennas_rx>1) {
    for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++) {
#if defined(__x86_64__) || defined(__i386__)
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#elif defined(__arm__)
      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#endif
      // MRC on each re of rb
      for (i=0; i<frame_parms->N_RB_DL*3; i++) {
#if defined(__x86_64__) || defined(__i386__)
        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
#elif defined(__arm__)
        rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
#endif
      }
    }
  }

#if defined(__x86_64__) || defined(__i386__)
  _mm_empty();
  _m_empty();
#endif

}

void pdcch_siso(LTE_DL_FRAME_PARMS *frame_parms,
                int32_t **rxdataF_comp,
                uint8_t l)
{


  uint8_t rb,re,jj,ii;

  jj=0;
  ii=0;

  for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

    for (re=0; re<12; re++) {

      rxdataF_comp[0][jj++] = rxdataF_comp[0][ii];
      ii++;
    }
  }
}


void pdcch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
                    int32_t **rxdataF_comp,
                    uint8_t symbol)
{


  int16_t *rxF0,*rxF1;
  uint8_t rb,re;
  int32_t jj=(symbol*frame_parms->N_RB_DL*12);

  rxF0     = (int16_t*)&rxdataF_comp[0][jj];  //tx antenna 0  h0*y
  rxF1     = (int16_t*)&rxdataF_comp[2][jj];  //tx antenna 1  h1*y

  for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

    for (re=0; re<12; re+=2) {

      // Alamouti RX combining

      rxF0[0] = rxF0[0] + rxF1[2];
      rxF0[1] = rxF0[1] - rxF1[3];

      rxF0[2] = rxF0[2] - rxF1[0];
      rxF0[3] = rxF0[3] + rxF1[1];

      rxF0+=4;
      rxF1+=4;
    }
  }


}

int32_t avgP[4];

int32_t rx_pdcch(PHY_VARS_UE *ue,
                 uint32_t frame,
                 uint8_t subframe,
                 uint8_t eNB_id,
                 MIMO_mode_t mimo_mode,
                 uint32_t high_speed_flag,
                 uint8_t is_secondary_ue)
{

  LTE_UE_COMMON *common_vars      = &ue->common_vars;
  LTE_DL_FRAME_PARMS *frame_parms = &ue->frame_parms;
  LTE_UE_PDCCH **pdcch_vars       = ue->pdcch_vars[ue->current_thread_id[subframe]];

  uint8_t log2_maxh,aatx,aarx;
#ifdef MU_RECEIVER
  uint8_t eNB_id_i=eNB_id+1;//add 1 to eNB_id to separate from wanted signal, chosen as the B/F'd pilots from the SeNB are shifted by 1
#endif
  int32_t avgs;
  uint8_t n_pdcch_symbols;
  uint8_t mi = get_mi(frame_parms,subframe);

  //printf("In rx_pdcch, subframe %d, eNB_id %d, pdcch_vars %d \n",subframe,eNB_id,pdcch_vars);
  // procress ofdm symbol 0
    if (is_secondary_ue == 1) {
      pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                               common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id+1], //add 1 to eNB_id to compensate for the shifted B/F'd pilots from the SeNB
                               pdcch_vars[eNB_id]->rxdataF_ext,
                               pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                               0,
                               high_speed_flag,
                               frame_parms);
#ifdef MU_RECEIVER
      pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                               common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id_i - 1],//subtract 1 to eNB_id_i to compensate for the non-shifted pilots from the PeNB
                               pdcch_vars[eNB_id_i]->rxdataF_ext,//shift by two to simulate transmission from a second antenna
                               pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,//shift by two to simulate transmission from a second antenna
                               0,
                               high_speed_flag,
                               frame_parms);
#endif //MU_RECEIVER
    } else if (frame_parms->nb_antenna_ports_eNB>1) {
      pdcch_extract_rbs_dual(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                             common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id],
                             pdcch_vars[eNB_id]->rxdataF_ext,
                             pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                             0,
                             high_speed_flag,
                             frame_parms);
    } else {
      pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                               common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id],
                               pdcch_vars[eNB_id]->rxdataF_ext,
                               pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                               0,
                               high_speed_flag,
                               frame_parms);
    }


  // compute channel level based on ofdm symbol 0
  pdcch_channel_level(pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                      frame_parms,
                      avgP,
                      frame_parms->N_RB_DL);

  avgs = 0;

  for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++)
      avgs = cmax(avgs,avgP[(aarx<<1)+aatx]);

  log2_maxh = (log2_approx(avgs)/2) + 5;  //+frame_parms->nb_antennas_rx;
#ifdef UE_DEBUG_TRACE
  LOG_D(PHY,"subframe %d: pdcch log2_maxh = %d (%d,%d)\n",subframe,log2_maxh,avgP[0],avgs);
#endif

  T(T_UE_PHY_PDCCH_ENERGY, T_INT(eNB_id),  T_INT(frame%1024), T_INT(subframe),
                           T_INT(avgP[0]), T_INT(avgP[1]),    T_INT(avgP[2]),  T_INT(avgP[3]));

  // compute LLRs for ofdm symbol 0 only
  pdcch_channel_compensation(pdcch_vars[eNB_id]->rxdataF_ext,
          pdcch_vars[eNB_id]->dl_ch_estimates_ext,
          pdcch_vars[eNB_id]->rxdataF_comp,
          (aatx>1) ? pdcch_vars[eNB_id]->rho : NULL,
                  frame_parms,
                  0,
                  log2_maxh); // log2_maxh+I0_shift


#ifdef DEBUG_PHY

  if (subframe==5)
      write_output("rxF_comp_d.m","rxF_c_d",&pdcch_vars[eNB_id]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);

#endif

#ifdef MU_RECEIVER

  if (is_secondary_ue) {
      //get MF output for interfering stream
      pdcch_channel_compensation(pdcch_vars[eNB_id_i]->rxdataF_ext,
              pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,
              pdcch_vars[eNB_id_i]->rxdataF_comp,
              (aatx>1) ? pdcch_vars[eNB_id_i]->rho : NULL,
                      frame_parms,
                      0,
                      log2_maxh); // log2_maxh+I0_shift
#ifdef DEBUG_PHY
      write_output("rxF_comp_i.m","rxF_c_i",&pdcch_vars[eNB_id_i]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
#endif
      pdcch_dual_stream_correlation(frame_parms,
              0,
              pdcch_vars[eNB_id]->dl_ch_estimates_ext,
              pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,
              pdcch_vars[eNB_id]->dl_ch_rho_ext,
              log2_maxh);
  }

#endif //MU_RECEIVER


  if (frame_parms->nb_antennas_rx > 1) {
#ifdef MU_RECEIVER

      if (is_secondary_ue) {
          pdcch_detection_mrc_i(frame_parms,
                  pdcch_vars[eNB_id]->rxdataF_comp,
                  pdcch_vars[eNB_id_i]->rxdataF_comp,
                  pdcch_vars[eNB_id]->rho,
                  pdcch_vars[eNB_id]->dl_ch_rho_ext,
                  0);
#ifdef DEBUG_PHY
          write_output("rxF_comp_d.m","rxF_c_d",&pdcch_vars[eNB_id]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
          write_output("rxF_comp_i.m","rxF_c_i",&pdcch_vars[eNB_id_i]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
#endif
      } else
#endif //MU_RECEIVER
          pdcch_detection_mrc(frame_parms,
                  pdcch_vars[eNB_id]->rxdataF_comp,
                  0);
  }

  if (mimo_mode == SISO)
      pdcch_siso(frame_parms,pdcch_vars[eNB_id]->rxdataF_comp,0);
  else
      pdcch_alamouti(frame_parms,pdcch_vars[eNB_id]->rxdataF_comp,0);


#ifdef MU_RECEIVER

  if (is_secondary_ue) {
      pdcch_qpsk_qpsk_llr(frame_parms,
              pdcch_vars[eNB_id]->rxdataF_comp,
              pdcch_vars[eNB_id_i]->rxdataF_comp,
              pdcch_vars[eNB_id]->dl_ch_rho_ext,
              pdcch_vars[eNB_id]->llr16, //subsequent function require 16 bit llr, but output must be 8 bit (actually clipped to 4, because of the Viterbi decoder)
              pdcch_vars[eNB_id]->llr,
              0);
      /*
      #ifdef DEBUG_PHY
      if (subframe==5) {
      write_output("llr8_seq.m","llr8",&pdcch_vars[eNB_id]->llr[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
      write_output("llr16_seq.m","llr16",&pdcch_vars[eNB_id]->llr16[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
      }
      #endif*/
  } else {
#endif //MU_RECEIVER
      pdcch_llr(frame_parms,
              pdcch_vars[eNB_id]->rxdataF_comp,
              (char *)pdcch_vars[eNB_id]->llr,
              0);
      /*#ifdef DEBUG_PHY
      write_output("llr8_seq.m","llr8",&pdcch_vars[eNB_id]->llr[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
      #endif*/

#ifdef MU_RECEIVER
  }

#endif //MU_RECEIVER


#if T_TRACER
  T(T_UE_PHY_PDCCH_IQ, T_INT(frame_parms->N_RB_DL), T_INT(frame_parms->N_RB_DL),
    T_INT(n_pdcch_symbols),
    T_BUFFER(pdcch_vars[eNB_id]->rxdataF_comp, frame_parms->N_RB_DL*12*n_pdcch_symbols* 4));
#endif

  // decode pcfich here and find out pdcch ofdm symbol number
  n_pdcch_symbols = rx_pcfich(frame_parms,
                              subframe,
                              pdcch_vars[eNB_id],
                              mimo_mode);


  if (n_pdcch_symbols>3)
    n_pdcch_symbols=1;


#ifdef DEBUG_DCI_DECODING

  LOG_I(PHY,"demapping: subframe %d, mi %d, tdd_config %d\n",subframe,get_mi(frame_parms,subframe),frame_parms->tdd_config);
#endif

  // process pdcch ofdm symbol 1 and 2 if necessary
  for (int s=1; s<n_pdcch_symbols; s++){
      if (is_secondary_ue == 1) {
          pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                  common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id+1], //add 1 to eNB_id to compensate for the shifted B/F'd pilots from the SeNB
                  pdcch_vars[eNB_id]->rxdataF_ext,
                  pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                  s,
                  high_speed_flag,
                  frame_parms);
#ifdef MU_RECEIVER
pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
        common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id_i - 1],//subtract 1 to eNB_id_i to compensate for the non-shifted pilots from the PeNB
        pdcch_vars[eNB_id_i]->rxdataF_ext,//shift by two to simulate transmission from a second antenna
        pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,//shift by two to simulate transmission from a second antenna
        s,
        high_speed_flag,
        frame_parms);
#endif //MU_RECEIVER
      } else if (frame_parms->nb_antenna_ports_eNB>1) {
          pdcch_extract_rbs_dual(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                  common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id],
                  pdcch_vars[eNB_id]->rxdataF_ext,
                  pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                  s,
                  high_speed_flag,
                  frame_parms);
      } else {
          pdcch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF,
                  common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_id],
                  pdcch_vars[eNB_id]->rxdataF_ext,
                  pdcch_vars[eNB_id]->dl_ch_estimates_ext,
                  s,
                  high_speed_flag,
                  frame_parms);
      }


      pdcch_channel_compensation(pdcch_vars[eNB_id]->rxdataF_ext,
              pdcch_vars[eNB_id]->dl_ch_estimates_ext,
              pdcch_vars[eNB_id]->rxdataF_comp,
              (aatx>1) ? pdcch_vars[eNB_id]->rho : NULL,
                      frame_parms,
                      s,
                      log2_maxh); // log2_maxh+I0_shift


#ifdef DEBUG_PHY

if (subframe==5)
    write_output("rxF_comp_d.m","rxF_c_d",&pdcch_vars[eNB_id]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);

#endif

#ifdef MU_RECEIVER

if (is_secondary_ue) {
    //get MF output for interfering stream
    pdcch_channel_compensation(pdcch_vars[eNB_id_i]->rxdataF_ext,
            pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,
            pdcch_vars[eNB_id_i]->rxdataF_comp,
            (aatx>1) ? pdcch_vars[eNB_id_i]->rho : NULL,
                    frame_parms,
                    s,
                    log2_maxh); // log2_maxh+I0_shift
#ifdef DEBUG_PHY
write_output("rxF_comp_i.m","rxF_c_i",&pdcch_vars[eNB_id_i]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
#endif
pdcch_dual_stream_correlation(frame_parms,
        s,
        pdcch_vars[eNB_id]->dl_ch_estimates_ext,
        pdcch_vars[eNB_id_i]->dl_ch_estimates_ext,
        pdcch_vars[eNB_id]->dl_ch_rho_ext,
        log2_maxh);
}

#endif //MU_RECEIVER


if (frame_parms->nb_antennas_rx > 1) {
#ifdef MU_RECEIVER

    if (is_secondary_ue) {
        pdcch_detection_mrc_i(frame_parms,
                pdcch_vars[eNB_id]->rxdataF_comp,
                pdcch_vars[eNB_id_i]->rxdataF_comp,
                pdcch_vars[eNB_id]->rho,
                pdcch_vars[eNB_id]->dl_ch_rho_ext,
                s);
#ifdef DEBUG_PHY
write_output("rxF_comp_d.m","rxF_c_d",&pdcch_vars[eNB_id]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
write_output("rxF_comp_i.m","rxF_c_i",&pdcch_vars[eNB_id_i]->rxdataF_comp[0][s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
#endif
    } else
#endif //MU_RECEIVER
        pdcch_detection_mrc(frame_parms,
                pdcch_vars[eNB_id]->rxdataF_comp,
                s);

}

if (mimo_mode == SISO)
    pdcch_siso(frame_parms,pdcch_vars[eNB_id]->rxdataF_comp,s);
else
    pdcch_alamouti(frame_parms,pdcch_vars[eNB_id]->rxdataF_comp,s);


#ifdef MU_RECEIVER

if (is_secondary_ue) {
    pdcch_qpsk_qpsk_llr(frame_parms,
            pdcch_vars[eNB_id]->rxdataF_comp,
            pdcch_vars[eNB_id_i]->rxdataF_comp,
            pdcch_vars[eNB_id]->dl_ch_rho_ext,
            pdcch_vars[eNB_id]->llr16, //subsequent function require 16 bit llr, but output must be 8 bit (actually clipped to 4, because of the Viterbi decoder)
            pdcch_vars[eNB_id]->llr,
            s);
    /*
        #ifdef DEBUG_PHY
        if (subframe==5) {
        write_output("llr8_seq.m","llr8",&pdcch_vars[eNB_id]->llr[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
        write_output("llr16_seq.m","llr16",&pdcch_vars[eNB_id]->llr16[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
        }
        #endif*/
} else {
#endif //MU_RECEIVER
    pdcch_llr(frame_parms,
            pdcch_vars[eNB_id]->rxdataF_comp,
            (char *)pdcch_vars[eNB_id]->llr,
            s);
    /*#ifdef DEBUG_PHY
        write_output("llr8_seq.m","llr8",&pdcch_vars[eNB_id]->llr[s*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,4);
        #endif*/

#ifdef MU_RECEIVER
}

#endif //MU_RECEIVER

  }

  pdcch_demapping(pdcch_vars[eNB_id]->llr,
                  pdcch_vars[eNB_id]->wbar,
                  frame_parms,
                  n_pdcch_symbols,
                  get_mi(frame_parms,subframe));

  pdcch_deinterleaving(frame_parms,
                       (uint16_t*)pdcch_vars[eNB_id]->e_rx,
                       pdcch_vars[eNB_id]->wbar,
                       n_pdcch_symbols,
                       mi);

  pdcch_unscrambling(frame_parms,
                     subframe,
                     pdcch_vars[eNB_id]->e_rx,
                     get_nCCE(n_pdcch_symbols,frame_parms,mi)*72);

  pdcch_vars[eNB_id]->num_pdcch_symbols = n_pdcch_symbols;

  return(0);
}


void pdcch_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
                      uint8_t subframe,
                      uint8_t *e,
                      uint32_t length)
{
  int i;
  uint8_t reset;
  uint32_t x1, x2, s=0;

  reset = 1;
  // x1 is set in lte_gold_generic

  x2 = (subframe<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.8.2

  for (i=0; i<length; i++) {
    if ((i&0x1f)==0) {
      s = lte_gold_generic(&x1, &x2, reset);
      //printf("lte_gold[%d]=%x\n",i,s);
      reset = 0;
    }

    //    printf("scrambling %d : e %d, c %d\n",i,e[i],((s>>(i&0x1f))&1));
    if (e[i] != 2) // <NIL> element is 2
      e[i] = (e[i]&1) ^ ((s>>(i&0x1f))&1);
  }
}

void pdcch_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
                        uint8_t subframe,
                        int8_t* llr,
                        uint32_t length)
{

  int i;
  uint8_t reset;
  uint32_t x1, x2, s=0;

  reset = 1;
  // x1 is set in first call to lte_gold_generic

  x2 = (subframe<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.8.2

  for (i=0; i<length; i++) {
    if ((i&0x1f)==0) {
      s = lte_gold_generic(&x1, &x2, reset);
      //      printf("lte_gold[%d]=%x\n",i,s);
      reset = 0;
    }

    
    //    printf("unscrambling %d : e %d, c %d => ",i,llr[i],((s>>(i&0x1f))&1));
    if (((s>>(i%32))&1)==0)
      llr[i] = -llr[i];
    //    printf("%d\n",llr[i]);

  }
}

/*
uint8_t get_num_pdcch_symbols(uint8_t num_dci,
                              DCI_ALLOC_t *dci_alloc,
                              LTE_DL_FRAME_PARMS *frame_parms,
                              uint8_t subframe)
{

  uint16_t numCCE = 0;
  uint8_t i;
  uint8_t nCCEmin = 0;
  uint16_t CCE_max_used_index = 0;
  uint16_t firstCCE_max = dci_alloc[0].firstCCE;
  uint8_t  L = dci_alloc[0].L;

  // check pdcch duration imposed by PHICH duration (Section 6.9 of 36-211)
  if (frame_parms->Ncp==1) { // extended prefix
    if ((frame_parms->frame_type == TDD) &&
        ((frame_parms->tdd_config<3)||(frame_parms->tdd_config==6)) &&
        ((subframe==1) || (subframe==6))) // subframes 1 and 6 (S-subframes) for 5ms switching periodicity are 2 symbols
      nCCEmin = 2;
    else {   // 10ms switching periodicity is always 3 symbols, any DL-only subframe is 3 symbols
      nCCEmin = 3;
    }
  }

  // compute numCCE
  for (i=0; i<num_dci; i++) {
    //     printf("dci %d => %d\n",i,dci_alloc[i].L);
    numCCE += (1<<(dci_alloc[i].L));

    if(firstCCE_max < dci_alloc[i].firstCCE) {
      firstCCE_max = dci_alloc[i].firstCCE;
      L            = dci_alloc[i].L;
    }
  }
  CCE_max_used_index = firstCCE_max + (1<<L) - 1;

  //if ((9*numCCE) <= (frame_parms->N_RB_DL*2))
  if (CCE_max_used_index < get_nCCE(1, frame_parms, get_mi(frame_parms, subframe)))
    return(cmax(1,nCCEmin));
  //else if ((9*numCCE) <= (frame_parms->N_RB_DL*((frame_parms->nb_antenna_ports_eNB==4) ? 4 : 5)))
  else if (CCE_max_used_index < get_nCCE(2, frame_parms, get_mi(frame_parms, subframe)))
    return(cmax(2,nCCEmin));
  //else if ((9*numCCE) <= (frame_parms->N_RB_DL*((frame_parms->nb_antenna_ports_eNB==4) ? 7 : 8)))
  else if (CCE_max_used_index < get_nCCE(3, frame_parms, get_mi(frame_parms, subframe)))
    return(cmax(3,nCCEmin));
  else if (frame_parms->N_RB_DL<=10) {
    if (frame_parms->Ncp == 0) { // normal CP
      printf("numCCE %d, N_RB_DL = %d : should be returning 4 PDCCH symbols (%d,%d,%d)\n",numCCE,frame_parms->N_RB_DL,
             get_nCCE(1, frame_parms, get_mi(frame_parms, subframe)),
             get_nCCE(2, frame_parms, get_mi(frame_parms, subframe)),
             get_nCCE(3, frame_parms, get_mi(frame_parms, subframe)));

      if ((9*numCCE) <= (frame_parms->N_RB_DL*((frame_parms->nb_antenna_ports_eNB==4) ? 10 : 11)))
        return(4);
    } else { // extended CP
      if ((9*numCCE) <= (frame_parms->N_RB_DL*((frame_parms->nb_antenna_ports_eNB==4) ? 9 : 10)))
        return(4);
    }
  }



  //  LOG_I(PHY," dci.c: get_num_pdcch_symbols subframe %d FATAL, illegal numCCE %d (num_dci %d)\n",subframe,numCCE,num_dci);
  //for (i=0;i<num_dci;i++) {
  //  printf("dci_alloc[%d].L = %d\n",i,dci_alloc[i].L);
  //}
  //exit(-1);
exit(1);
  return(0);
}
*/


uint8_t generate_dci_top(uint8_t num_pdcch_symbols,
			 uint8_t num_dci,
                         DCI_ALLOC_t *dci_alloc,
                         uint32_t n_rnti,
                         int16_t amp,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t **txdataF,
                         uint32_t subframe)
{


  uint8_t *e_ptr;
  int8_t L;
  uint32_t i, lprime;
  uint32_t gain_lin_QPSK,kprime,kprime_mod12,mprime,nsymb,symbol_offset,tti_offset;
  int16_t re_offset;
  uint8_t mi = get_mi(frame_parms,subframe);
  static uint8_t e[DCI_BITS_MAX];
  static int32_t yseq0[Msymb],yseq1[Msymb],wbar0[Msymb],wbar1[Msymb];

  int32_t *y[2];
  int32_t *wbar[2];

  int nushiftmod3 = frame_parms->nushift%3;

  int Msymb2;
  int split_flag=0;

  switch (frame_parms->N_RB_DL) {
  case 100:
    Msymb2 = Msymb;
    break;

  case 75:
    Msymb2 = 3*Msymb/4;
    break;

  case 50:
    Msymb2 = Msymb>>1;
    break;

  case 25:
    Msymb2 = Msymb>>2;
    break;

  case 15:
    Msymb2 = Msymb*15/100;
    break;

  case 6:
    Msymb2 = Msymb*6/100;
    break;

  default:
    Msymb2 = Msymb>>2;
    break;
  }


  generate_pcfich(num_pdcch_symbols,
                  amp,
                  frame_parms,
                  txdataF,
                  subframe);
  wbar[0] = &wbar0[0];
  wbar[1] = &wbar1[0];
  y[0] = &yseq0[0];
  y[1] = &yseq1[0];

#if 0
  // reset all bits to <NIL>, here we set <NIL> elements as 2
  // memset(e, 2, DCI_BITS_MAX);
  // here we interpret NIL as a random QPSK sequence. That makes power estimation easier.
  for (i=0; i<DCI_BITS_MAX; i++)
    e[i]=taus()&1;
#endif

  /* clear all bits, the above code may generate too much false detections
   * (not sure about this, to be checked somehow)
   */
  memset(e, 0, DCI_BITS_MAX);

  e_ptr = e;


  // generate DCIs in order of decreasing aggregation level, then common/ue spec
  // MAC is assumed to have ordered the UE spec DCI according to the RNTI-based randomization
  for (L=8; L>=1; L>>=1) {
    for (i=0; i<num_dci; i++) {

      if (dci_alloc[i].L == (uint8_t)L) {

	#ifdef DEBUG_DCI_ENCODING
	if (dci_alloc[i].rnti==0x02)
	  LOG_I(PHY,"Generating DCI %d/%d (nCCE %d) of length %d, aggregation %d (%x), rnti %x\n",i,num_dci,dci_alloc[i].firstCCE,dci_alloc[i].dci_length,dci_alloc[i].L,
		*(unsigned int*)dci_alloc[i].dci_pdu,
		dci_alloc[i].rnti);
       //dump_dci(frame_parms,&dci_alloc[i]);
	#endif

        if (dci_alloc[i].firstCCE>=0) {
          e_ptr = generate_dci0(dci_alloc[i].dci_pdu,
                                e+(72*dci_alloc[i].firstCCE),
                                dci_alloc[i].dci_length,
                                dci_alloc[i].L,
				72,
                                dci_alloc[i].rnti);
        }
      }
    }
  }

  // Scrambling
  //  printf("pdcch scrambling\n");
  pdcch_scrambling(frame_parms,
                   subframe,
                   e,
                   8*get_nquad(num_pdcch_symbols, frame_parms, mi));
  //72*get_nCCE(num_pdcch_symbols,frame_parms,mi));




  // Now do modulation
  if (frame_parms->nb_antenna_ports_eNB==1)
    gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
  else
    gain_lin_QPSK = amp/2;

  e_ptr = e;

#ifdef DEBUG_DCI_ENCODING
  printf(" PDCCH Modulation, Msymb %d, Msymb2 %d,gain_lin_QPSK %d\n",Msymb,Msymb2,gain_lin_QPSK);
#endif


  if (frame_parms->nb_antenna_ports_eNB==1) { //SISO


    for (i=0; i<Msymb2; i++) {
      
      //((int16_t*)(&(y[0][i])))[0] = (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      //((int16_t*)(&(y[1][i])))[0] = (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      ((int16_t*)(&(y[0][i])))[0] = (*e_ptr == 2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      ((int16_t*)(&(y[1][i])))[0] = (*e_ptr == 2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      e_ptr++;
      //((int16_t*)(&(y[0][i])))[1] = (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      //((int16_t*)(&(y[1][i])))[1] = (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      ((int16_t*)(&(y[0][i])))[1] = (*e_ptr == 2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      ((int16_t*)(&(y[1][i])))[1] = (*e_ptr == 2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;

      e_ptr++;
    }
  } else { //ALAMOUTI


    for (i=0; i<Msymb2; i+=2) {

#ifdef DEBUG_DCI_ENCODING
      printf(" PDCCH Modulation (TX diversity): REG %d\n",i>>2);
#endif
      // first antenna position n -> x0
      ((int16_t*)&y[0][i])[0] = (*e_ptr==2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      e_ptr++;
      ((int16_t*)&y[0][i])[1] = (*e_ptr==2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      e_ptr++;

      // second antenna position n -> -x1*
      ((int16_t*)&y[1][i])[0] = (*e_ptr==2) ? 0 : (*e_ptr == 1) ? gain_lin_QPSK : -gain_lin_QPSK;
      e_ptr++;
      ((int16_t*)&y[1][i])[1] = (*e_ptr==2) ? 0 : (*e_ptr == 1) ? -gain_lin_QPSK : gain_lin_QPSK;
      e_ptr++;

      // fill in the rest of the ALAMOUTI precoding
      ((int16_t*)&y[0][i+1])[0] = -((int16_t*)&y[1][i])[0];
      ((int16_t*)&y[0][i+1])[1] = ((int16_t*)&y[1][i])[1];
      ((int16_t*)&y[1][i+1])[0] = ((int16_t*)&y[0][i])[0];
      ((int16_t*)&y[1][i+1])[1] = -((int16_t*)&y[0][i])[1];

    }
  }


#ifdef DEBUG_DCI_ENCODING
  printf(" PDCCH Interleaving\n");
#endif

  //  printf("y %p (%p,%p), wbar %p (%p,%p)\n",y,y[0],y[1],wbar,wbar[0],wbar[1]);
  // This is the interleaving procedure defined in 36-211, first part of Section 6.8.5
  pdcch_interleaving(frame_parms,&y[0],&wbar[0],num_pdcch_symbols,mi);

  mprime=0;
  nsymb = (frame_parms->Ncp==0) ? 14:12;
  re_offset = frame_parms->first_carrier_offset;

  // This is the REG allocation algorithm from 36-211, second part of Section 6.8.5
  //  printf("DCI (SF %d) : txdataF %p (0 %p)\n",subframe,&txdataF[0][512*14*subframe],&txdataF[0][0]);
  for (kprime=0; kprime<frame_parms->N_RB_DL*12; kprime++) {
    for (lprime=0; lprime<num_pdcch_symbols; lprime++) {

      symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(lprime+(subframe*nsymb));



      tti_offset = symbol_offset + re_offset;

      (re_offset==(frame_parms->ofdm_symbol_size-2)) ? (split_flag=1) : (split_flag=0);

      //            printf("kprime %d, lprime %d => REG %d (symbol %d)\n",kprime,lprime,(lprime==0)?(kprime/6) : (kprime>>2),symbol_offset);
      // if REG is allocated to PHICH, skip it
      if (check_phich_reg(frame_parms,kprime,lprime,mi) == 1) {
#ifdef DEBUG_DCI_ENCODING
        printf("generate_dci: skipping REG %d (kprime %d, lprime %d)\n",(lprime==0)?(kprime/6) : (kprime>>2),kprime,lprime);
#endif
      } else {
        // Copy REG to TX buffer

        if ((lprime == 0)||
            ((lprime==1)&&(frame_parms->nb_antenna_ports_eNB == 4))) {
          // first symbol, or second symbol+4 TX antennas skip pilots

          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 6)) {
            // kprime represents REG

            for (i=0; i<6; i++) {
              if ((i!=(nushiftmod3))&&(i!=(nushiftmod3+3))) {
                txdataF[0][tti_offset+i] = wbar[0][mprime];

                if (frame_parms->nb_antenna_ports_eNB > 1)
                  txdataF[1][tti_offset+i] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
                printf(" PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset+i,*(short*)&wbar[0][mprime],*(1+(short*)&wbar[0][mprime]));
#endif

                mprime++;
              }
            }
          }
        } else { // no pilots in this symbol
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 4) || (kprime_mod12 == 8)) {
            // kprime represents REG
            if (split_flag==0) {
              for (i=0; i<4; i++) {
                txdataF[0][tti_offset+i] = wbar[0][mprime];

                if (frame_parms->nb_antenna_ports_eNB > 1)
                  txdataF[1][tti_offset+i] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
                LOG_I(PHY," PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset+i,*(short*)&wbar[0][mprime],*(1+(short*)&wbar[0][mprime]));
#endif
                mprime++;
              }
            } else {
              txdataF[0][tti_offset+0] = wbar[0][mprime];

              if (frame_parms->nb_antenna_ports_eNB > 1)
                txdataF[1][tti_offset+0] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
              printf(" PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset,*(short*)&wbar[0][mprime],*(1+(short*)&wbar[0][mprime]));
#endif
              mprime++;
              txdataF[0][tti_offset+1] = wbar[0][mprime];

              if (frame_parms->nb_antenna_ports_eNB > 1)
                txdataF[1][tti_offset+1] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
              printf("PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset+1,*(short*)&wbar[0][mprime],*(1+(short*)&wbar[0][mprime]));
#endif
              mprime++;
              txdataF[0][tti_offset-frame_parms->ofdm_symbol_size+3] = wbar[0][mprime];

              if (frame_parms->nb_antenna_ports_eNB > 1)
                txdataF[1][tti_offset-frame_parms->ofdm_symbol_size+3] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
              printf(" PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset-frame_parms->ofdm_symbol_size+3,*(short*)&wbar[0][mprime],
                    *(1+(short*)&wbar[0][mprime]));
#endif
              mprime++;
              txdataF[0][tti_offset-frame_parms->ofdm_symbol_size+4] = wbar[0][mprime];

              if (frame_parms->nb_antenna_ports_eNB > 1)
                txdataF[1][tti_offset-frame_parms->ofdm_symbol_size+4] = wbar[1][mprime];

#ifdef DEBUG_DCI_ENCODING
              printf(" PDCCH mapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset-frame_parms->ofdm_symbol_size+4,*(short*)&wbar[0][mprime],
                    *(1+(short*)&wbar[0][mprime]));
#endif
              mprime++;

            }
          }
        }

        if (mprime>=Msymb2)
          return(num_pdcch_symbols);
      } // check_phich_reg

    } //lprime loop

    re_offset++;

    if (re_offset == (frame_parms->ofdm_symbol_size))
      re_offset = 1;
  } // kprime loop

  return(num_pdcch_symbols);
}



void dci_decoding(uint8_t DCI_LENGTH,
                  uint8_t aggregation_level,
                  int8_t *e,
                  uint8_t *decoded_output)
{

  uint8_t dummy_w_rx[3*(MAX_DCI_SIZE_BITS+16+64)];
  int8_t w_rx[3*(MAX_DCI_SIZE_BITS+16+32)],d_rx[96+(3*(MAX_DCI_SIZE_BITS+16))];

  uint16_t RCC;

  uint16_t D=(DCI_LENGTH+16+64);
  uint16_t coded_bits;
#ifdef DEBUG_DCI_DECODING
  int32_t i;
#endif

  AssertFatal(aggregation_level<4,
	      "dci_decoding FATAL, illegal aggregation_level %d\n",aggregation_level);

  coded_bits = 72 * (1<<aggregation_level);

#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY," Doing DCI decoding for %d bits, DCI_LENGTH %d,coded_bits %d, e %p\n",3*(DCI_LENGTH+16),DCI_LENGTH,coded_bits,e);
#endif

  // now do decoding
  memset((void*)dummy_w_rx,0,3*D);
  RCC = generate_dummy_w_cc(DCI_LENGTH+16,
                            dummy_w_rx);



#ifdef DEBUG_DCI_DECODING
  LOG_I(PHY," Doing DCI Rate Matching RCC %d, w %p\n",RCC,w);
#endif

  lte_rate_matching_cc_rx(RCC,coded_bits,w_rx,dummy_w_rx,e);

  sub_block_deinterleaving_cc((uint32_t)(DCI_LENGTH+16),
                              &d_rx[96],
                              &w_rx[0]);

#ifdef DEBUG_DCI_DECODING

  for (i=0; i<16+DCI_LENGTH; i++)
    LOG_I(PHY," DCI %d : (%d,%d,%d)\n",i,*(d_rx+96+(3*i)),*(d_rx+97+(3*i)),*(d_rx+98+(3*i)));

#endif
  memset(decoded_output,0,2+((16+DCI_LENGTH)>>3));

#ifdef DEBUG_DCI_DECODING
  printf("Before Viterbi\n");

  for (i=0; i<16+DCI_LENGTH; i++)
    printf("%d : (%d,%d,%d)\n",i,*(d_rx+96+(3*i)),*(d_rx+97+(3*i)),*(d_rx+98+(3*i)));

#endif
  //debug_printf("Doing DCI Viterbi \n");
  phy_viterbi_lte_sse2(d_rx+96,decoded_output,16+DCI_LENGTH);
  //debug_printf("Done DCI Viterbi \n");
}


static uint8_t dci_decoded_output[RX_NB_TH][(MAX_DCI_SIZE_BITS+64)/8];

uint16_t get_nCCE(uint8_t num_pdcch_symbols,LTE_DL_FRAME_PARMS *frame_parms,uint8_t mi)
{
  return(get_nquad(num_pdcch_symbols,frame_parms,mi)/9);
}

uint16_t get_nquad(uint8_t num_pdcch_symbols,LTE_DL_FRAME_PARMS *frame_parms,uint8_t mi)
{

  uint16_t Nreg=0;
  uint8_t Ngroup_PHICH = (frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)/48;

  if (((frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)%48) > 0)
    Ngroup_PHICH++;

  if (frame_parms->Ncp == 1) {
    Ngroup_PHICH<<=1;
  }

  Ngroup_PHICH*=mi;

  if ((num_pdcch_symbols>0) && (num_pdcch_symbols<4))
    switch (frame_parms->N_RB_DL) {
    case 6:
      Nreg=12+(num_pdcch_symbols-1)*18;
      break;

    case 25:
      Nreg=50+(num_pdcch_symbols-1)*75;
      break;

    case 50:
      Nreg=100+(num_pdcch_symbols-1)*150;
      break;

    case 100:
      Nreg=200+(num_pdcch_symbols-1)*300;
      break;

    default:
      return(0);
    }

  //   printf("Nreg %d (%d)\n",Nreg,Nreg - 4 - (3*Ngroup_PHICH));
  return(Nreg - 4 - (3*Ngroup_PHICH));
}

uint16_t get_nCCE_mac(uint8_t Mod_id,uint8_t CC_id,int num_pdcch_symbols,int subframe)
{

  // check for eNB only !
  return(get_nCCE(num_pdcch_symbols,
		  &RC.eNB[Mod_id][CC_id]->frame_parms,
		  get_mi(&RC.eNB[Mod_id][CC_id]->frame_parms,subframe))); 
}


int get_nCCE_offset_l1(int *CCE_table,
		       const unsigned char L, 
		       const int nCCE, 
		       const int common_dci, 
		       const unsigned short rnti, 
		       const unsigned char subframe)
{

  int search_space_free,m,nb_candidates = 0,l,i;
  unsigned int Yk;
   /*
    printf("CCE Allocation: ");
    for (i=0;i<nCCE;i++)
    printf("%d.",CCE_table[i]);
    printf("\n");
  */
  if (common_dci == 1) {
    // check CCE(0 ... L-1)
    nb_candidates = (L==4) ? 4 : 2;
    nb_candidates = min(nb_candidates,nCCE/L);

    //    printf("Common DCI nb_candidates %d, L %d\n",nb_candidates,L);

    for (m = nb_candidates-1 ; m >=0 ; m--) {

      search_space_free = 1;
      for (l=0; l<L; l++) {

	//	printf("CCE_table[%d] %d\n",(m*L)+l,CCE_table[(m*L)+l]);
        if (CCE_table[(m*L) + l] == 1) {
          search_space_free = 0;
          break;
        }
      }
     
      if (search_space_free == 1) {

	//	printf("returning %d\n",m*L);

        for (l=0; l<L; l++)
          CCE_table[(m*L)+l]=1;
        return(m*L);
      }
    }

    return(-1);

  } else { // Find first available in ue specific search space
    // according to procedure in Section 9.1.1 of 36.213 (v. 8.6)
    // compute Yk
    Yk = (unsigned int)rnti;

    for (i=0; i<=subframe; i++)
      Yk = (Yk*39827)%65537;

    Yk = Yk % (nCCE/L);


    switch (L) {
    case 1:
    case 2:
      nb_candidates = 6;
      break;

    case 4:
    case 8:
      nb_candidates = 2;
      break;

    default:
      DevParam(L, nCCE, rnti);
      break;
    }


    LOG_D(MAC,"rnti %x, Yk = %d, nCCE %d (nCCE/L %d),nb_cand %d\n",rnti,Yk,nCCE,nCCE/L,nb_candidates);

    for (m = 0 ; m < nb_candidates ; m++) {
      search_space_free = 1;

      for (l=0; l<L; l++) {
        int cce = (((Yk+m)%(nCCE/L))*L) + l;
        if (cce >= nCCE || CCE_table[cce] == 1) {
          search_space_free = 0;
          break;
        }
      }

      if (search_space_free == 1) {
        for (l=0; l<L; l++)
          CCE_table[(((Yk+m)%(nCCE/L))*L)+l]=1;

        return(((Yk+m)%(nCCE/L))*L);
      }
    }

    return(-1);
  }
}


void dci_decoding_procedure0(LTE_UE_PDCCH **pdcch_vars,
			     int do_common,
			     dci_detect_mode_t mode,
			     uint8_t subframe,
                             DCI_ALLOC_t *dci_alloc,
                             int16_t eNB_id,
                             uint8_t current_thread_id,
                             LTE_DL_FRAME_PARMS *frame_parms,
                             uint8_t mi,
                             uint16_t si_rnti,
                             uint16_t ra_rnti,
                             uint16_t p_rnti,
                             uint8_t L,
                             uint8_t format_si,
                             uint8_t format_p,
                             uint8_t format_ra,
                             uint8_t format_c,
                             uint8_t sizeof_bits,
                             uint8_t sizeof_bytes,
                             uint8_t *dci_cnt,
                             uint8_t *format0_found,
                             uint8_t *format_c_found,
                             uint32_t *CCEmap0,
                             uint32_t *CCEmap1,
                             uint32_t *CCEmap2)
{

  uint16_t crc,CCEind,nCCE;
  uint32_t *CCEmap=NULL,CCEmap_mask=0;
  int L2=(1<<L);
  unsigned int Yk,nb_candidates = 0,i,m;
  unsigned int CCEmap_cand;

  nCCE = get_nCCE(pdcch_vars[eNB_id]->num_pdcch_symbols,frame_parms,mi);

  if (nCCE > get_nCCE(3,frame_parms,1)) {
    LOG_D(PHY,"skip DCI decoding: nCCE=%d > get_nCCE(3,frame_parms,1)=%d\n", nCCE, get_nCCE(3,frame_parms,1));
    return;
  }

  if (nCCE<L2) {
    LOG_D(PHY,"skip DCI decoding: nCCE=%d < L2=%d\n", nCCE, L2);
    return;
  }

  if (mode == NO_DCI) {
    LOG_D(PHY, "skip DCI decoding: expect no DCIs at subframe %d\n", subframe);
    return;
  }

  if (do_common == 1) {
    nb_candidates = (L2==4) ? 4 : 2;
    Yk=0;
  } else {
    // Find first available in ue specific search space
    // according to procedure in Section 9.1.1 of 36.213 (v. 8.6)
    // compute Yk
    Yk = (unsigned int)pdcch_vars[eNB_id]->crnti;

    for (i=0; i<=subframe; i++)
      Yk = (Yk*39827)%65537;

    Yk = Yk % (nCCE/L2);

    switch (L2) {
    case 1:
    case 2:
      nb_candidates = 6;
      break;

    case 4:
    case 8:
      nb_candidates = 2;
      break;

    default:
      DevParam(L2, do_common, eNB_id);
      break;
    }
  }

  /*  for (CCEind=0;
       CCEind<nCCE2;
       CCEind+=(1<<L)) {*/

  if (nb_candidates*L2 > nCCE)
    nb_candidates = nCCE/L2;

  for (m=0; m<nb_candidates; m++) {

    CCEind = (((Yk+m)%(nCCE/L2))*L2);

    if (CCEind<32)
      CCEmap = CCEmap0;
    else if (CCEind<64)
      CCEmap = CCEmap1;
    else if (CCEind<96)
      CCEmap = CCEmap2;
    else {
      AssertFatal(1==0,
		  "Illegal CCEind %d (Yk %d, m %d, nCCE %d, L2 %d\n",CCEind,Yk,m,nCCE,L2);
    }

    switch (L2) {
    case 1:
      CCEmap_mask = (1<<(CCEind&0x1f));
      break;

    case 2:
      CCEmap_mask = (3<<(CCEind&0x1f));
      break;

    case 4:
      CCEmap_mask = (0xf<<(CCEind&0x1f));
      break;

    case 8:
      CCEmap_mask = (0xff<<(CCEind&0x1f));
      break;

    default:
      AssertFatal(1==0,
		  "Illegal L2 value %d\n", L2 );
    }

    CCEmap_cand = (*CCEmap)&CCEmap_mask;

    // CCE is not allocated yet

    if (CCEmap_cand == 0) {

      if (do_common == 1)
        LOG_D(PHY,"[DCI search nPdcch %d - common] Attempting candidate %d Aggregation Level %d DCI length %d at CCE %d/%d (CCEmap %x,CCEmap_cand %x)\n",
                pdcch_vars[eNB_id]->num_pdcch_symbols,m,L2,sizeof_bits,CCEind,nCCE,*CCEmap,CCEmap_mask);
      else
        LOG_D(PHY,"[DCI search nPdcch %d - ue spec] Attempting candidate %d Aggregation Level %d DCI length %d at CCE %d/%d (CCEmap %x,CCEmap_cand %x) format %d\n",
                pdcch_vars[eNB_id]->num_pdcch_symbols,m,L2,sizeof_bits,CCEind,nCCE,*CCEmap,CCEmap_mask,format_c);

       dci_decoding(sizeof_bits,
                   L,
                   &pdcch_vars[eNB_id]->e_rx[CCEind*72],
                   &dci_decoded_output[current_thread_id][0]);
      /*
        for (i=0;i<3+(sizeof_bits>>3);i++)
        printf("dci_decoded_output[%d] => %x\n",i,dci_decoded_output[i]);
      */

      crc = (crc16(&dci_decoded_output[current_thread_id][0],sizeof_bits)>>16) ^ extract_crc(&dci_decoded_output[current_thread_id][0],sizeof_bits);
#ifdef DEBUG_DCI_DECODING
      printf("crc =>%x\n",crc);
#endif

      if (((L>1) && ((crc == si_rnti)||
		     (crc == p_rnti)||
                     (crc == ra_rnti)))||
          (crc == pdcch_vars[eNB_id]->crnti))   {
        dci_alloc[*dci_cnt].dci_length = sizeof_bits;
        dci_alloc[*dci_cnt].rnti       = crc;
        dci_alloc[*dci_cnt].L          = L;
        dci_alloc[*dci_cnt].firstCCE   = CCEind;

        //printf("DCI FOUND !!! crc =>%x,  sizeof_bits %d, sizeof_bytes %d \n",crc, sizeof_bits, sizeof_bytes);
        if (sizeof_bytes<=4) {
          dci_alloc[*dci_cnt].dci_pdu[3] = dci_decoded_output[current_thread_id][0];
          dci_alloc[*dci_cnt].dci_pdu[2] = dci_decoded_output[current_thread_id][1];
          dci_alloc[*dci_cnt].dci_pdu[1] = dci_decoded_output[current_thread_id][2];
          dci_alloc[*dci_cnt].dci_pdu[0] = dci_decoded_output[current_thread_id][3];
#ifdef DEBUG_DCI_DECODING
          printf("DCI => %x,%x,%x,%x\n",dci_decoded_output[current_thread_id][0],
                  dci_decoded_output[current_thread_id][1],
                  dci_decoded_output[current_thread_id][2],
                  dci_decoded_output[current_thread_id][3]);
#endif
        } else {
          dci_alloc[*dci_cnt].dci_pdu[7] = dci_decoded_output[current_thread_id][0];
          dci_alloc[*dci_cnt].dci_pdu[6] = dci_decoded_output[current_thread_id][1];
          dci_alloc[*dci_cnt].dci_pdu[5] = dci_decoded_output[current_thread_id][2];
          dci_alloc[*dci_cnt].dci_pdu[4] = dci_decoded_output[current_thread_id][3];
          dci_alloc[*dci_cnt].dci_pdu[3] = dci_decoded_output[current_thread_id][4];
          dci_alloc[*dci_cnt].dci_pdu[2] = dci_decoded_output[current_thread_id][5];
          dci_alloc[*dci_cnt].dci_pdu[1] = dci_decoded_output[current_thread_id][6];
          dci_alloc[*dci_cnt].dci_pdu[0] = dci_decoded_output[current_thread_id][7];
#ifdef DEBUG_DCI_DECODING
          printf("DCI => %x,%x,%x,%x,%x,%x,%x,%x\n",
              dci_decoded_output[current_thread_id][0],dci_decoded_output[current_thread_id][1],dci_decoded_output[current_thread_id][2],dci_decoded_output[current_thread_id][3],
              dci_decoded_output[current_thread_id][4],dci_decoded_output[current_thread_id][5],dci_decoded_output[current_thread_id][6],dci_decoded_output[current_thread_id][7]);
#endif
        }

        if (crc==si_rnti) {
          dci_alloc[*dci_cnt].format     = format_si;
          *dci_cnt = *dci_cnt+1;
        } else if (crc==p_rnti) {
          dci_alloc[*dci_cnt].format     = format_p;
          *dci_cnt = *dci_cnt+1;
        } else if (crc==ra_rnti) {
          dci_alloc[*dci_cnt].format     = format_ra;
          // store first nCCE of group for PUCCH transmission of ACK/NAK
          pdcch_vars[eNB_id]->nCCE[subframe]=CCEind;
          *dci_cnt = *dci_cnt+1;
        } else if (crc==pdcch_vars[eNB_id]->crnti) {

          if ((mode&UL_DCI)&&(format_c == format0)&&((dci_decoded_output[current_thread_id][0]&0x80)==0)) {// check if pdu is format 0 or 1A
            if (*format0_found == 0) {
              dci_alloc[*dci_cnt].format     = format0;
              *format0_found = 1;
              *dci_cnt = *dci_cnt+1;
              pdcch_vars[eNB_id]->nCCE[subframe]=CCEind;
            }
          } else if (format_c == format0) { // this is a format 1A DCI
            dci_alloc[*dci_cnt].format     = format1A;
            *dci_cnt = *dci_cnt+1;
            pdcch_vars[eNB_id]->nCCE[subframe]=CCEind;
          } else {
            // store first nCCE of group for PUCCH transmission of ACK/NAK
            if (*format_c_found == 0) {
              dci_alloc[*dci_cnt].format     = format_c;
              *dci_cnt = *dci_cnt+1;
              *format_c_found = 1;
              pdcch_vars[eNB_id]->nCCE[subframe]=CCEind;
            }
          }
        }

        //LOG_I(PHY,"DCI decoding CRNTI  [format: %d, nCCE[subframe: %d]: %d ], AggregationLevel %d \n",format_c, subframe, pdcch_vars[eNB_id]->nCCE[subframe],L2);
        //  memcpy(&dci_alloc[*dci_cnt].dci_pdu[0],dci_decoded_output,sizeof_bytes);



        switch (1<<L) {
        case 1:
          *CCEmap|=(1<<(CCEind&0x1f));
          break;

        case 2:
          *CCEmap|=(1<<(CCEind&0x1f));
          break;

        case 4:
          *CCEmap|=(1<<(CCEind&0x1f));
          break;

        case 8:
          *CCEmap|=(1<<(CCEind&0x1f));
          break;
        }

#ifdef DEBUG_DCI_DECODING
        LOG_I(PHY,"[DCI search] Found DCI %d rnti %x Aggregation %d length %d format %s in CCE %d (CCEmap %x) candidate %d / %d \n",
              *dci_cnt,crc,1<<L,sizeof_bits,dci_format_strings[dci_alloc[*dci_cnt-1].format],CCEind,*CCEmap,m,nb_candidates );
        dump_dci(frame_parms,&dci_alloc[*dci_cnt-1]);

#endif
         return;
      } // rnti match
    }  // CCEmap_cand == 0
/*    
	if ( agregationLevel != 0xFF &&
        (format_c == format0 && m==0 && si_rnti != SI_RNTI))
    {
      //Only valid for OAI : Save some processing time when looking for DCI format0. From the log we see the DCI only on candidate 0.
      return;
    }
*/
  } // candidate loop
}

uint16_t dci_CRNTI_decoding_procedure(PHY_VARS_UE *ue,
                                DCI_ALLOC_t *dci_alloc,
                                uint8_t DCIFormat,
                                uint8_t agregationLevel,
                                int16_t eNB_id,
                                uint8_t subframe)
{

  uint8_t  dci_cnt=0,old_dci_cnt=0;
  uint32_t CCEmap0=0,CCEmap1=0,CCEmap2=0;
  LTE_UE_PDCCH **pdcch_vars = ue->pdcch_vars[ue->current_thread_id[subframe]];
  LTE_DL_FRAME_PARMS *frame_parms  = &ue->frame_parms;
  uint8_t mi = get_mi(&ue->frame_parms,subframe);
  uint16_t ra_rnti=99;
  uint8_t format0_found=0,format_c_found=0;
  uint8_t tmode = ue->transmission_mode[eNB_id];
  uint8_t frame_type = frame_parms->frame_type;
  uint8_t format0_size_bits=0,format0_size_bytes=0;
  uint8_t format1_size_bits=0,format1_size_bytes=0;
  dci_detect_mode_t mode = dci_detect_mode_select(&ue->frame_parms,subframe);

  switch (frame_parms->N_RB_DL) {
  case 6:
    if (frame_type == TDD) {
      format0_size_bits  = sizeof_DCI0_1_5MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_1_5MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_1_5MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_1_5MHz_TDD_t);

    } else {
      format0_size_bits  = sizeof_DCI0_1_5MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_1_5MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_1_5MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_1_5MHz_FDD_t);
    }

    break;

  case 25:
  default:
    if (frame_type == TDD) {
      format0_size_bits  = sizeof_DCI0_5MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_5MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_5MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_5MHz_TDD_t);
    } else {
      format0_size_bits  = sizeof_DCI0_5MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_5MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_5MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_5MHz_FDD_t);
    }

    break;

  case 50:
    if (frame_type == TDD) {
      format0_size_bits  = sizeof_DCI0_10MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_10MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_10MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_10MHz_TDD_t);

    } else {
      format0_size_bits  = sizeof_DCI0_10MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_10MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_10MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_10MHz_FDD_t);
    }

    break;

  case 100:
    if (frame_type == TDD) {
      format0_size_bits  = sizeof_DCI0_20MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_20MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_20MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_20MHz_TDD_t);
    } else {
      format0_size_bits  = sizeof_DCI0_20MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_20MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_20MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_20MHz_FDD_t);
    }

    break;
  }

  if (ue->prach_resources[eNB_id])
    ra_rnti = ue->prach_resources[eNB_id]->ra_RNTI;

  // Now check UE_SPEC format0/1A ue_spec search spaces at aggregation 8
  dci_decoding_procedure0(pdcch_vars,0,mode,
                          subframe,
                          dci_alloc,
                          eNB_id,
                          ue->current_thread_id[subframe],
                          frame_parms,
                          mi,
                          ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                          ra_rnti,
              P_RNTI,
              agregationLevel,
                          format1A,
                          format1A,
                          format1A,
                          format0,
                          format0_size_bits,
                          format0_size_bytes,
                          &dci_cnt,
                          &format0_found,
                          &format_c_found,
                          &CCEmap0,
                          &CCEmap1,
                          &CCEmap2);

  if ((CCEmap0==0xffff)||
      ((format0_found==1)&&(format_c_found==1)))
    return(dci_cnt);

  if (DCIFormat == 1)
  {
      if ((tmode < 3) || (tmode == 7)) {
          //printf("Crnti decoding frame param agregation %d DCI %d \n",agregationLevel,DCIFormat);

          // Now check UE_SPEC format 1 search spaces at aggregation 1

           //printf("[DCI search] Format 1/1A aggregation 1\n");

          old_dci_cnt=dci_cnt;
          dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
                                  dci_alloc,
                                  eNB_id,
                                  ue->current_thread_id[subframe],
                                  frame_parms,
                                  mi,
                                  ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                                  ra_rnti,
                                  P_RNTI,
                                  0,
                                  format1A,
                                  format1A,
                                  format1A,
                                  format1,
                                  format1_size_bits,
                                  format1_size_bytes,
                                  &dci_cnt,
                                  &format0_found,
                                  &format_c_found,
                                  &CCEmap0,
                                  &CCEmap1,
                                  &CCEmap2);

          if ((CCEmap0==0xffff) ||
              (format_c_found==1))
            return(dci_cnt);

          if (dci_cnt>old_dci_cnt)
            return(dci_cnt);

          //printf("Crnti 1 decoding frame param agregation %d DCI %d \n",agregationLevel,DCIFormat);

      }
      else
      {
          AssertFatal(0,"Other Transmission mode not yet coded\n");
      }
  }
  else
  {
     AssertFatal(0,"DCI format %d not yet implemented \n",DCIFormat);
  }

  return(dci_cnt);

}

uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
                                DCI_ALLOC_t *dci_alloc,
                                int do_common,
                                int16_t eNB_id,
                                uint8_t subframe)
{

  uint8_t  dci_cnt=0,old_dci_cnt=0;
  uint32_t CCEmap0=0,CCEmap1=0,CCEmap2=0;
  LTE_UE_PDCCH **pdcch_vars = ue->pdcch_vars[ue->current_thread_id[subframe]];
  LTE_DL_FRAME_PARMS *frame_parms  = &ue->frame_parms;
  uint8_t mi = get_mi(&ue->frame_parms,subframe);
  uint16_t ra_rnti=99;
  uint8_t format0_found=0,format_c_found=0;
  uint8_t tmode = ue->transmission_mode[eNB_id];
  uint8_t frame_type = frame_parms->frame_type;
  uint8_t format1A_size_bits=0,format1A_size_bytes=0;
  uint8_t format1C_size_bits=0,format1C_size_bytes=0;
  uint8_t format0_size_bits=0,format0_size_bytes=0;
  uint8_t format1_size_bits=0,format1_size_bytes=0;
  uint8_t format2_size_bits=0,format2_size_bytes=0;
  uint8_t format2A_size_bits=0,format2A_size_bytes=0;
  dci_detect_mode_t mode = dci_detect_mode_select(&ue->frame_parms,subframe);

  switch (frame_parms->N_RB_DL) {
  case 6:
    if (frame_type == TDD) {
      format1A_size_bits  = sizeof_DCI1A_1_5MHz_TDD_1_6_t;
      format1A_size_bytes = sizeof(DCI1A_1_5MHz_TDD_1_6_t);
      format1C_size_bits  = sizeof_DCI1C_1_5MHz_t;
      format1C_size_bytes = sizeof(DCI1C_1_5MHz_t);
      format0_size_bits  = sizeof_DCI0_1_5MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_1_5MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_1_5MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_1_5MHz_TDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_1_5MHz_2A_TDD_t;
        format2_size_bytes = sizeof(DCI2_1_5MHz_2A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_1_5MHz_2A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_1_5MHz_2A_TDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_1_5MHz_4A_TDD_t;
        format2_size_bytes = sizeof(DCI2_1_5MHz_4A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_1_5MHz_4A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_1_5MHz_4A_TDD_t);
      }
    } else {
      format1A_size_bits  = sizeof_DCI1A_1_5MHz_FDD_t;
      format1A_size_bytes = sizeof(DCI1A_1_5MHz_FDD_t);
      format1C_size_bits  = sizeof_DCI1C_1_5MHz_t;
      format1C_size_bytes = sizeof(DCI1C_1_5MHz_t);
      format0_size_bits  = sizeof_DCI0_1_5MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_1_5MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_1_5MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_1_5MHz_FDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_1_5MHz_2A_FDD_t;
        format2_size_bytes = sizeof(DCI2_1_5MHz_2A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_1_5MHz_2A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_1_5MHz_2A_FDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_1_5MHz_4A_FDD_t;
        format2_size_bytes = sizeof(DCI2_1_5MHz_4A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_1_5MHz_4A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_1_5MHz_4A_FDD_t);
      }
    }

    break;

  case 25:
  default:
    if (frame_type == TDD) {
      format1A_size_bits  = sizeof_DCI1A_5MHz_TDD_1_6_t;
      format1A_size_bytes = sizeof(DCI1A_5MHz_TDD_1_6_t);
      format1C_size_bits  = sizeof_DCI1C_5MHz_t;
      format1C_size_bytes = sizeof(DCI1C_5MHz_t);
      format0_size_bits  = sizeof_DCI0_5MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_5MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_5MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_5MHz_TDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_5MHz_2A_TDD_t;
        format2_size_bytes = sizeof(DCI2_5MHz_2A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_5MHz_2A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_5MHz_2A_TDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_5MHz_4A_TDD_t;
        format2_size_bytes = sizeof(DCI2_5MHz_4A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_5MHz_4A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_5MHz_4A_TDD_t);
      }
    } else {
      format1A_size_bits  = sizeof_DCI1A_5MHz_FDD_t;
      format1A_size_bytes = sizeof(DCI1A_5MHz_FDD_t);
      format1C_size_bits  = sizeof_DCI1C_5MHz_t;
      format1C_size_bytes = sizeof(DCI1C_5MHz_t);
      format0_size_bits  = sizeof_DCI0_5MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_5MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_5MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_5MHz_FDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_5MHz_2A_FDD_t;
        format2_size_bytes = sizeof(DCI2_5MHz_2A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_5MHz_2A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_5MHz_2A_FDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_5MHz_4A_FDD_t;
        format2_size_bytes = sizeof(DCI2_5MHz_4A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_5MHz_4A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_5MHz_4A_FDD_t);
      }
    }

    break;

  case 50:
    if (frame_type == TDD) {
      format1A_size_bits  = sizeof_DCI1A_10MHz_TDD_1_6_t;
      format1A_size_bytes = sizeof(DCI1A_10MHz_TDD_1_6_t);
      format1C_size_bits  = sizeof_DCI1C_10MHz_t;
      format1C_size_bytes = sizeof(DCI1C_10MHz_t);
      format0_size_bits  = sizeof_DCI0_10MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_10MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_10MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_10MHz_TDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_10MHz_2A_TDD_t;
        format2_size_bytes = sizeof(DCI2_10MHz_2A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_10MHz_2A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_10MHz_2A_TDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_10MHz_4A_TDD_t;
        format2_size_bytes = sizeof(DCI2_10MHz_4A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_10MHz_4A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_10MHz_4A_TDD_t);
      }
    } else {
      format1A_size_bits  = sizeof_DCI1A_10MHz_FDD_t;
      format1A_size_bytes = sizeof(DCI1A_10MHz_FDD_t);
      format1C_size_bits  = sizeof_DCI1C_10MHz_t;
      format1C_size_bytes = sizeof(DCI1C_10MHz_t);
      format0_size_bits  = sizeof_DCI0_10MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_10MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_10MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_10MHz_FDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_10MHz_2A_FDD_t;
        format2_size_bytes = sizeof(DCI2_10MHz_2A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_10MHz_2A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_10MHz_2A_FDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_10MHz_4A_FDD_t;
        format2_size_bytes = sizeof(DCI2_10MHz_4A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_10MHz_4A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_10MHz_4A_FDD_t);
      }
    }

    break;

  case 100:
    if (frame_type == TDD) {
      format1A_size_bits  = sizeof_DCI1A_20MHz_TDD_1_6_t;
      format1A_size_bytes = sizeof(DCI1A_20MHz_TDD_1_6_t);
      format1C_size_bits  = sizeof_DCI1C_20MHz_t;
      format1C_size_bytes = sizeof(DCI1C_20MHz_t);
      format0_size_bits  = sizeof_DCI0_20MHz_TDD_1_6_t;
      format0_size_bytes = sizeof(DCI0_20MHz_TDD_1_6_t);
      format1_size_bits  = sizeof_DCI1_20MHz_TDD_t;
      format1_size_bytes = sizeof(DCI1_20MHz_TDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_20MHz_2A_TDD_t;
        format2_size_bytes = sizeof(DCI2_20MHz_2A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_20MHz_2A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_20MHz_2A_TDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_20MHz_4A_TDD_t;
        format2_size_bytes = sizeof(DCI2_20MHz_4A_TDD_t);
        format2A_size_bits  = sizeof_DCI2A_20MHz_4A_TDD_t;
        format2A_size_bytes = sizeof(DCI2A_20MHz_4A_TDD_t);
      }
    } else {
      format1A_size_bits  = sizeof_DCI1A_20MHz_FDD_t;
      format1A_size_bytes = sizeof(DCI1A_20MHz_FDD_t);
      format1C_size_bits  = sizeof_DCI1C_20MHz_t;
      format1C_size_bytes = sizeof(DCI1C_20MHz_t);
      format0_size_bits  = sizeof_DCI0_20MHz_FDD_t;
      format0_size_bytes = sizeof(DCI0_20MHz_FDD_t);
      format1_size_bits  = sizeof_DCI1_20MHz_FDD_t;
      format1_size_bytes = sizeof(DCI1_20MHz_FDD_t);

      if (frame_parms->nb_antenna_ports_eNB == 2) {
        format2_size_bits  = sizeof_DCI2_20MHz_2A_FDD_t;
        format2_size_bytes = sizeof(DCI2_20MHz_2A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_20MHz_2A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_20MHz_2A_FDD_t);
      } else if (frame_parms->nb_antenna_ports_eNB == 4) {
        format2_size_bits  = sizeof_DCI2_20MHz_4A_FDD_t;
        format2_size_bytes = sizeof(DCI2_20MHz_4A_FDD_t);
        format2A_size_bits  = sizeof_DCI2A_20MHz_4A_FDD_t;
        format2A_size_bytes = sizeof(DCI2A_20MHz_4A_FDD_t);
      }
    }

    break;
  }

  if (do_common == 1) {
#ifdef DEBUG_DCI_DECODING
    printf("[DCI search] doing common search/format0 aggregation 4\n");
#endif

    if (ue->prach_resources[eNB_id])
      ra_rnti = ue->prach_resources[eNB_id]->ra_RNTI;

    // First check common search spaces at aggregation 4 (SI_RNTI, P_RNTI and RA_RNTI format 0/1A),
    // and UE_SPEC format0 (PUSCH) too while we're at it
    dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0) ,
                            ra_rnti,
			    P_RNTI,
                            2,
                            format1A,
                            format1A,
                            format1A,
                            format0,
                            format1A_size_bits,
                            format1A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff) ||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    // Now check common search spaces at aggregation 4 (SI_RNTI,P_RNTI and RA_RNTI and C-RNTI format 1C),
    // and UE_SPEC format0 (PUSCH) too while we're at it
    dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            2,
                            format1C,
                            format1C,
                            format1C,
                            format1C,
                            format1C_size_bits,
                            format1C_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff) ||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    // Now check common search spaces at aggregation 8 (SI_RNTI,P_RNTI and RA_RNTI format 1A),
    // and UE_SPEC format0 (PUSCH) too while we're at it
    //  printf("[DCI search] doing common search/format0 aggregation 3\n");
#ifdef DEBUG_DCI_DECODING
    printf("[DCI search] doing common search/format0 aggregation 8\n");
#endif
    dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
			    P_RNTI,
                            ra_rnti,
                            3,
                            format1A,
                            format1A,
                            format1A,
                            format0,
                            format1A_size_bits,
                            format1A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    // Now check common search spaces at aggregation 8 (SI_RNTI and RA_RNTI and C-RNTI format 1C),
    // and UE_SPEC format0 (PUSCH) too while we're at it
    dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
			    3,
                            format1C,
                            format1C,
                            format1C,
                            format1C,
                            format1C_size_bits,
                            format1C_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //#endif

  }

  if (ue->UE_mode[eNB_id] <= PRACH)
    return(dci_cnt);

  if (ue->prach_resources[eNB_id])
    ra_rnti = ue->prach_resources[eNB_id]->ra_RNTI;

  // Now check UE_SPEC format0/1A ue_spec search spaces at aggregation 8
  //  printf("[DCI search] Format 0/1A aggregation 8\n");
  dci_decoding_procedure0(pdcch_vars,0,mode,
                          subframe,
                          dci_alloc,
                          eNB_id,
                          ue->current_thread_id[subframe],
                          frame_parms,
                          mi,
                          ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                          ra_rnti,
			  P_RNTI,
			  0,
                          format1A,
                          format1A,
                          format1A,
                          format0,
                          format0_size_bits,
                          format0_size_bytes,
                          &dci_cnt,
                          &format0_found,
                          &format_c_found,
                          &CCEmap0,
                          &CCEmap1,
                          &CCEmap2);

  if ((CCEmap0==0xffff)||
      ((format0_found==1)&&(format_c_found==1)))
    return(dci_cnt);

  //printf("[DCI search] Format 0 aggregation 1 dci_cnt %d\n",dci_cnt);

  if (dci_cnt == 0)
  {
  // Now check UE_SPEC format 0 search spaces at aggregation 4
  dci_decoding_procedure0(pdcch_vars,0,mode,
                          subframe,
                          dci_alloc,
                          eNB_id,
                          ue->current_thread_id[subframe],
                          frame_parms,
                          mi,
                          ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                          ra_rnti,
			  P_RNTI,
			  1,
                          format1A,
                          format1A,
                          format1A,
                          format0,
                          format0_size_bits,
                          format0_size_bytes,
                          &dci_cnt,
                          &format0_found,
                          &format_c_found,
                          &CCEmap0,
                          &CCEmap1,
                          &CCEmap2);

  if ((CCEmap0==0xffff)||
      ((format0_found==1)&&(format_c_found==1)))
    return(dci_cnt);


  //printf("[DCI search] Format 0 aggregation 2 dci_cnt %d\n",dci_cnt);
  }

  if (dci_cnt == 0)
  {
  // Now check UE_SPEC format 0 search spaces at aggregation 2
  dci_decoding_procedure0(pdcch_vars,0,mode,
                          subframe,
                          dci_alloc,
                          eNB_id,
                          ue->current_thread_id[subframe],
                          frame_parms,
                          mi,
                          ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                          ra_rnti,
			  P_RNTI,
                          2,
                          format1A,
                          format1A,
                          format1A,
                          format0,
                          format0_size_bits,
                          format0_size_bytes,
                          &dci_cnt,
                          &format0_found,
                          &format_c_found,
                          &CCEmap0,
                          &CCEmap1,
                          &CCEmap2);

  if ((CCEmap0==0xffff)||
      ((format0_found==1)&&(format_c_found==1)))
    return(dci_cnt);

  //printf("[DCI search] Format 0 aggregation 4 dci_cnt %d\n",dci_cnt);
  }

  if (dci_cnt == 0)
  {
  // Now check UE_SPEC format 0 search spaces at aggregation 1
  dci_decoding_procedure0(pdcch_vars,0,mode,
                          subframe,
                          dci_alloc,
                          eNB_id,
                          ue->current_thread_id[subframe],
                          frame_parms,
                          mi,
                          ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                          ra_rnti,
			  P_RNTI,
                          3,
                          format1A,
                          format1A,
                          format1A,
                          format0,
                          format0_size_bits,
                          format0_size_bytes,
                          &dci_cnt,
                          &format0_found,
                          &format_c_found,
                          &CCEmap0,
                          &CCEmap1,
                          &CCEmap2);

  if ((CCEmap0==0xffff)||
      ((format0_found==1)&&(format_c_found==1)))
    return(dci_cnt);

  //printf("[DCI search] Format 0 aggregation 8 dci_cnt %d\n",dci_cnt);

  }
  // These are for CRNTI based on transmission mode
  if ((tmode < 3) || (tmode == 7)) {
    // Now check UE_SPEC format 1 search spaces at aggregation 1
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            0,
                            format1A,
                            format1A,
                            format1A,
                            format1,
                            format1_size_bits,
                            format1_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //printf("[DCI search] Format 1 aggregation 1 dci_cnt %d\n",dci_cnt);

    if ((CCEmap0==0xffff) ||
        (format_c_found==1))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 1 search spaces at aggregation 2
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            1,
                            format1A,
                            format1A,
                            format1A,
                            format1,
                            format1_size_bits,
                            format1_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //printf("[DCI search] Format 1 aggregation 2 dci_cnt %d\n",dci_cnt);

    if ((CCEmap0==0xffff)||
        (format_c_found==1))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 1 search spaces at aggregation 4
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
			    2,
                            format1A,
                            format1A,
                            format1A,
                            format1,
                            format1_size_bits,
                            format1_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //printf("[DCI search] Format 1 aggregation 4 dci_cnt %d\n",dci_cnt);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#ifdef ALL_AGGREGATION
    // Now check UE_SPEC format 1 search spaces at aggregation 8
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            3,
                            format1A,
                            format1A,
                            format1A,
                            format1,
                            format1_size_bits,
                            format1_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //printf("[DCI search] Format 1 aggregation 8 dci_cnt %d\n",dci_cnt);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#endif //ALL_AGGREGATION
  } else if (tmode == 3) {


    LOG_D(PHY," Now check UE_SPEC format 2A_2A search aggregation 1 dci length: %d[bits] %d[bytes]\n",format2A_size_bits,format2A_size_bytes);
    // Now check UE_SPEC format 2A_2A search spaces at aggregation 1
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
                            P_RNTI,
                            0,
                            format1A,
                            format1A,
                            format1A,
                            format2A,
                            format2A_size_bits,
                            format2A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    LOG_D(PHY," format 2A_2A search CCEmap0 %x, format0_found %d, format_c_found %d \n", CCEmap0, format0_found, format_c_found);
    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    LOG_D(PHY," format 2A_2A search dci_cnt %d, old_dci_cn t%d \n", dci_cnt, old_dci_cnt);
    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 2 search spaces at aggregation 2
    LOG_D(PHY," Now check UE_SPEC format 2A_2A search aggregation 2 dci length: %d[bits] %d[bytes]\n",format2A_size_bits,format2A_size_bytes);
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            1,
                            format1A,
                            format1A,
                            format1A,
                            format2A,
                            format2A_size_bits,
                            format2A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    LOG_D(PHY," format 2A_2A search dci_cnt %d, old_dci_cn t%d \n", dci_cnt, old_dci_cnt);
    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 2_2A search spaces at aggregation 4
    LOG_D(PHY," Now check UE_SPEC format 2_2A search spaces at aggregation 4 \n");
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
                            P_RNTI,
                            2,
                            format1A,
                            format1A,
                            format1A,
                            format2A,
                            format2A_size_bits,
                            format2A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    LOG_D(PHY," format 2A_2A search dci_cnt %d, old_dci_cn t%d \n", dci_cnt, old_dci_cnt);
    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#ifdef ALL_AGGREGATION
    // Now check UE_SPEC format 2_2A search spaces at aggregation 8
    LOG_D(PHY," Now check UE_SPEC format 2_2A search spaces at aggregation 8 dci length: %d[bits] %d[bytes]\n",format2A_size_bits,format2A_size_bytes);
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            3,
                            format1A,
                            format1A,
                            format1A,
                            format2A,
                            format2A_size_bits,
                            format2A_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //#endif
    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    LOG_D(PHY," format 2A_2A search dci_cnt %d, old_dci_cn t%d \n", dci_cnt, old_dci_cnt);
    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);
  } else if (tmode == 4) {

    // Now check UE_SPEC format 2_2A search spaces at aggregation 1
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            0,
                            format1A,
                            format1A,
                            format1A,
                            format2,
                            format2_size_bits,
                            format2_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 2 search spaces at aggregation 2
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            1,
                            format1A,
                            format1A,
                            format1A,
                            format2,
                            format2_size_bits,
                            format2_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 2_2A search spaces at aggregation 4
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            2,
                            format1A,
                            format1A,
                            format1A,
                            format2,
                            format2_size_bits,
                            format2_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#ifdef ALL_AGGREGATION
    // Now check UE_SPEC format 2_2A search spaces at aggregation 8
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            3,
                            format1A,
                            format1A,
                            format1A,
                            format2,
                            format2_size_bits,
                            format2_size_bytes,
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);
    //#endif
  } else if ((tmode==5) || (tmode==6)) { // This is MU-MIMO

    // Now check UE_SPEC format 1E_2A_M10PRB search spaces aggregation 1
#ifdef DEBUG_DCI_DECODING
    LOG_I(PHY," MU-MIMO check UE_SPEC format 1E_2A_M10PRB\n");
#endif
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            0,
                            format1A,
                            format1A,
                            format1A,
                            format1E_2A_M10PRB,
                            sizeof_DCI1E_5MHz_2A_M10PRB_TDD_t,
                            sizeof(DCI1E_5MHz_2A_M10PRB_TDD_t),
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);


    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 1E_2A_M10PRB search spaces aggregation 2
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            1,
                            format1A,
                            format1A,
                            format1A,
                            format1E_2A_M10PRB,
                            sizeof_DCI1E_5MHz_2A_M10PRB_TDD_t,
                            sizeof(DCI1E_5MHz_2A_M10PRB_TDD_t),
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    // Now check UE_SPEC format 1E_2A_M10PRB search spaces aggregation 4
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            2,
                            format1A,
                            format1A,
                            format1A,
                            format1E_2A_M10PRB,
                            sizeof_DCI1E_5MHz_2A_M10PRB_TDD_t,
                            sizeof(DCI1E_5MHz_2A_M10PRB_TDD_t),
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#ifdef ALL_AGGREGATION

    // Now check UE_SPEC format 1E_2A_M10PRB search spaces at aggregation 8
    old_dci_cnt=dci_cnt;
    dci_decoding_procedure0(pdcch_vars,0,mode,
                            subframe,
                            dci_alloc,
                            eNB_id,
                            ue->current_thread_id[subframe],
                            frame_parms,
                            mi,
                            ((ue->decode_SIB == 1) ? SI_RNTI : 0),
                            ra_rnti,
			    P_RNTI,
                            3,
                            format1A,
                            format1A,
                            format1A,
                            format1E_2A_M10PRB,
                            sizeof_DCI1E_5MHz_2A_M10PRB_TDD_t,
                            sizeof(DCI1E_5MHz_2A_M10PRB_TDD_t),
                            &dci_cnt,
                            &format0_found,
                            &format_c_found,
                            &CCEmap0,
                            &CCEmap1,
                            &CCEmap2);

    if ((CCEmap0==0xffff)||
        ((format0_found==1)&&(format_c_found==1)))
      return(dci_cnt);

    if (dci_cnt>old_dci_cnt)
      return(dci_cnt);

    //#endif  //ALL_AGGREGATION

  }

  return(dci_cnt);
}

#ifdef PHY_ABSTRACTION
uint16_t dci_decoding_procedure_emul(LTE_UE_PDCCH **pdcch_vars,
                                     uint8_t num_ue_spec_dci,
                                     uint8_t num_common_dci,
                                     DCI_ALLOC_t *dci_alloc_tx,
                                     DCI_ALLOC_t *dci_alloc_rx,
                                     int16_t eNB_id)
{

  uint8_t  dci_cnt=0,i;

  memcpy(dci_alloc_rx,dci_alloc_tx,num_common_dci*sizeof(DCI_ALLOC_t));
  dci_cnt = num_common_dci;
  LOG_D(PHY,"[DCI][EMUL] : num_common_dci %d\n",num_common_dci);

  for (i=num_common_dci; i<(num_ue_spec_dci+num_common_dci); i++) {
    LOG_D(PHY,"[DCI][EMUL] Checking dci %d => %x format %d (bit 0 %d)\n",i,pdcch_vars[eNB_id]->crnti,dci_alloc_tx[i].format,
          dci_alloc_tx[i].dci_pdu[0]&0x80);

    if (dci_alloc_tx[i].rnti == pdcch_vars[eNB_id]->crnti) {
      memcpy(dci_alloc_rx+dci_cnt,dci_alloc_tx+i,sizeof(DCI_ALLOC_t));
      dci_cnt++;
    }
  }


  return(dci_cnt);
}
#endif