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/*
* 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
*/
#include "refsig_defs_ue.h"
void nr_gold_pbch(PHY_VARS_NR_UE* ue)
{
unsigned int n, x1, x2;
unsigned int Nid, i_ssb, i_ssb2;
unsigned char Lmax, l, n_hf, N_hf;
Nid = ue->frame_parms.Nid_cell;
Lmax = 8; //(fp->dl_CarrierFreq < 3e9)? 4:8;
N_hf = (Lmax == 4)? 2:1;
for (n_hf = 0; n_hf < N_hf; n_hf++) {
for (l = 0; l < Lmax ; l++) {
i_ssb = l & (Lmax-1);
i_ssb2 = (i_ssb<<2) + n_hf;
x1 = 1 + (1<<31);
x2 = (1<<11) * (i_ssb2 + 1) * ((Nid>>2) + 1) + (1<<6) * (i_ssb2 + 1) + (Nid&3);
x2 = x2 ^ ((x2 ^ (x2>>1) ^ (x2>>2) ^ (x2>>3))<<31);
// skip first 50 double words (1600 bits)
for (n = 1; n < 50; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
}
for (n=0; n<NR_PBCH_DMRS_LENGTH_DWORD; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
ue->nr_gold_pbch[n_hf][l][n] = x1 ^ x2;
}
}
}
}
void nr_gold_pdcch(PHY_VARS_NR_UE* ue,unsigned short n_idDMRS, unsigned short length_dmrs)
{
unsigned char ns,l;
unsigned int n,x1,x2,x2tmp0;
unsigned int nid;
if (n_idDMRS)
nid = n_idDMRS;
else
nid = ue->frame_parms.Nid_cell;
for (ns=0; ns<20; ns++) {
for (l=0; l<length_dmrs; l++) {
x2tmp0 = ((14*ns+l+1)*((nid<<1)+1))<<17;
x2 = (x2tmp0+(nid<<1))%(1<<31); //cinit
x1 = 1+ (1<<31);
x2=x2 ^ ((x2 ^ (x2>>1) ^ (x2>>2) ^ (x2>>3))<<31);
// skip first 50 double words (1600 bits)
for (n=1; n<50; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
//printf("x1 : %x, x2 : %x\n",x1,x2);
}
for (n=0; n<52; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
ue->nr_gold_pdcch[0][ns][l][n] = x1^x2;
//printf("n=%d : c %x\n",n,x1^x2);
}
}
}
}
void nr_gold_pdsch(PHY_VARS_NR_UE* ue,unsigned short lbar,unsigned short *n_idDMRS, unsigned short length_dmrs)
{
unsigned char ns,l;
unsigned int n,x1,x2,x2tmp0;
int nscid;
unsigned int nid;
/// to be updated from higher layer
//unsigned short lbar = 0;
for (nscid=0; nscid<2; nscid++) {
if (n_idDMRS)
nid = n_idDMRS[nscid];
else
nid = ue->frame_parms.Nid_cell;
//printf("gold pdsch nid %d lbar %d\n",nid,lbar);
for (ns=0; ns<20; ns++) {
for (l=0; l<length_dmrs; l++) {
x2tmp0 = ((14*ns+(lbar+l)+1)*((nid<<1)+1))<<17;
x2 = (x2tmp0+(nid<<1)+nscid)%(1<<31); //cinit
//printf("ns %d gold pdsch x2 %d\n",ns,x2);
x1 = 1+ (1<<31);
x2=x2 ^ ((x2 ^ (x2>>1) ^ (x2>>2) ^ (x2>>3))<<31);
// skip first 50 double words (1600 bits)
for (n=1; n<50; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
//printf("x1 : %x, x2 : %x\n",x1,x2);
}
for (n=0; n<52; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
ue->nr_gold_pdsch[nscid][ns][l][n] = x1^x2;
// if ((ns==2)&&(l==0))
//printf("n=%d : c %x\n",n,x1^x2);
}
}
}
}
}