Added ulsim with the same code of ulschim

cmake_targets/CMakeLists.txt

@@ -2573,6 +2573,12 @@ add_executable(nr_ulschsim
   ${T_SOURCE})
 target_link_libraries(nr_ulschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
 
+add_executable(nr_ulsim
+  ${OPENAIR1_DIR}/SIMULATION/NR_PHY/ulsim.c
+  ${OPENAIR_DIR}/common/utils/backtrace.c
+  ${T_SOURCE})
+target_link_libraries(nr_ulsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+
 
 foreach(myExe dlsim dlsim_tm7 ulsim pbchsim scansim mbmssim pdcchsim pucchsim prachsim syncsim)
   

cmake_targets/build_oai

@@ -684,7 +684,7 @@ function main() {
     echo_info "Compiling unitary tests simulators"
     # TODO: fix: dlsim_tm4 pucchsim prachsim pdcchsim pbchsim mbmssim
     #simlist="dlsim_tm4 dlsim ulsim pucchsim prachsim pdcchsim pbchsim mbmssim"
-    simlist="nr_pucchsim dlsim ulsim polartest ldpctest smallblocktest nr_pbchsim nr_dlschsim nr_dlsim nr_ulschsim"
+    simlist="nr_pucchsim dlsim ulsim polartest ldpctest smallblocktest nr_pbchsim nr_dlschsim nr_dlsim nr_ulschsim nr_ulsim"
     for f in $simlist ; do
       compilations \
       phy_simulators $f \

openair1/SIMULATION/NR_PHY/ulsim.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
+*/
+
+#include <string.h>
+#include <math.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include "common/config/config_userapi.h"
+#include "common/utils/LOG/log.h"
+#include "common/ran_context.h"
+
+#include "SIMULATION/TOOLS/sim.h"
+#include "SIMULATION/RF/rf.h"
+
+#include "PHY/types.h"
+#include "PHY/defs_nr_common.h"
+#include "PHY/defs_nr_UE.h"
+#include "PHY/defs_gNB.h"
+#include "PHY/INIT/phy_init.h"
+#include "PHY/NR_REFSIG/refsig_defs_ue.h"
+#include "PHY/NR_REFSIG/nr_mod_table.h"
+#include "PHY/MODULATION/modulation_eNB.h"
+#include "PHY/MODULATION/modulation_UE.h"
+#include "PHY/NR_TRANSPORT/nr_transport.h"
+#include "PHY/NR_TRANSPORT/nr_dlsch.h"
+#include "PHY/NR_TRANSPORT/nr_ulsch.h"
+#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
+
+#include "SCHED_NR/sched_nr.h"
+
+//#include "PHY/MODULATION/modulation_common.h"
+//#include "common/config/config_load_configmodule.h"
+//#include "UTIL/LISTS/list.h"
+//#include "common/ran_context.h"
+
+//#define DEBUG_ULSCHSIM
+
+PHY_VARS_gNB *gNB;
+PHY_VARS_NR_UE *UE;
+RAN_CONTEXT_t RC;
+
+double cpuf;
+
+// dummy functions
+int nfapi_mode = 0;
+int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req) {
+  return (0);
+}
+int oai_nfapi_tx_req(nfapi_tx_request_t *tx_req) {
+  return (0);
+}
+
+int oai_nfapi_dl_config_req(nfapi_dl_config_request_t *dl_config_req) {
+  return (0);
+}
+
+int oai_nfapi_ul_config_req(nfapi_ul_config_request_t *ul_config_req) {
+  return (0);
+}
+
+int oai_nfapi_nr_dl_config_req(nfapi_nr_dl_config_request_t *dl_config_req) {
+  return (0);
+}
+
+uint32_t from_nrarfcn(int nr_bandP, uint32_t dl_earfcn) {
+  return (0);
+}
+int32_t get_uldl_offset(int eutra_bandP) {
+  return (0);
+}
+
+NR_IF_Module_t *
+NR_IF_Module_init(int Mod_id) {
+  return (NULL);
+}
+
+void exit_function(const char *file, const char *function, const int line, const char *s) {
+  const char *msg = s == NULL ? "no comment" : s;
+  printf("Exiting at: %s:%d %s(), %s\n", file, line, function, msg);
+  exit(-1);
+}
+
+// needed for some functions
+PHY_VARS_NR_UE *PHY_vars_UE_g[1][1] = { { NULL } };
+uint16_t n_rnti = 0x1234;
+openair0_config_t openair0_cfg[MAX_CARDS];
+
+char quantize(double D, double x, unsigned char B) {
+  double qxd;
+  short maxlev;
+  qxd = floor(x / D);
+  maxlev = 1 << (B - 1); //(char)(pow(2,B-1));
+
+  //printf("x=%f,qxd=%f,maxlev=%d\n",x,qxd, maxlev);
+
+  if (qxd <= -maxlev)
+    qxd = -maxlev;
+  else if (qxd >= maxlev)
+    qxd = maxlev - 1;
+
+  return ((char) qxd);
+}
+
+int main(int argc, char **argv) {
+
+  char c;
+  int i,sf; //,j,l,aa;
+  double SNR, SNR_lin, snr0 = -2.0, snr1 = 2.0;
+  double snr_step = 0.1;
+  uint8_t snr1set = 0;
+  int **txdata;
+  double **s_re, **s_im, **r_re, **r_im;
+  //  int sync_pos, sync_pos_slot;
+  //  FILE *rx_frame_file;
+  FILE *output_fd = NULL;
+  //uint8_t write_output_file = 0;
+  //  int subframe_offset;
+  //  char fname[40], vname[40];
+  int trial, n_trials = 1, n_errors = 0, n_false_positive = 0;
+  uint8_t n_tx = 1, n_rx = 1;
+  //uint8_t transmission_mode = 1;
+  uint16_t Nid_cell = 0;
+  channel_desc_t *gNB2UE;
+  uint8_t extended_prefix_flag = 0;
+  //int8_t interf1 = -21, interf2 = -21;
+  FILE *input_fd = NULL, *pbch_file_fd = NULL;
+  //char input_val_str[50],input_val_str2[50];
+  //uint16_t NB_RB=25;
+  SCM_t channel_model = AWGN;  //Rayleigh1_anticorr;
+  uint16_t N_RB_DL = 106, N_RB_UL = 106, mu = 1;
+  //unsigned char frame_type = 0;
+  unsigned char pbch_phase = 0;
+  int frame = 0, subframe = 0;
+  int frame_length_complex_samples;
+  //int frame_length_complex_samples_no_prefix;
+  NR_DL_FRAME_PARMS *frame_parms;
+  //nfapi_nr_config_request_t *gNB_config;
+  // uint8_t Kmimo = 0;
+  uint32_t Nsoft = 0;
+  double sigma;
+  unsigned char qbits = 8;
+  int ret;
+  //int run_initial_sync=0;
+  int loglvl = OAILOG_WARNING;
+  float target_error_rate = 0.01;
+  uint64_t SSB_positions=0x01;
+  uint16_t nb_symb_sch = 12;
+  uint16_t nb_rb = 50;
+  uint8_t Imcs = 9;
+
+  cpuf = get_cpu_freq_GHz();
+
+  if (load_configmodule(argc, argv) == 0) {
+    exit_fun("[SOFTMODEM] Error, configuration module init failed\n");
+  }
+
+  //logInit();
+  randominit(0);
+
+  while ((c = getopt(argc, argv, "df:hpg:i:j:n:l:m:r:s:S:y:z:M:N:F:R:P:")) != -1) {
+    switch (c) {
+      /*case 'f':
+         write_output_file = 1;
+         output_fd = fopen(optarg, "w");
+
+         if (output_fd == NULL) {
+             printf("Error opening %s\n", optarg);
+             exit(-1);
+         }
+
+         break;*/
+
+      /*case 'd':
+        frame_type = 1;
+        break;*/
+
+      case 'g':
+        switch ((char) *optarg) {
+          case 'A':
+            channel_model = SCM_A;
+            break;
+
+          case 'B':
+            channel_model = SCM_B;
+            break;
+
+          case 'C':
+            channel_model = SCM_C;
+            break;
+
+          case 'D':
+            channel_model = SCM_D;
+            break;
+
+          case 'E':
+            channel_model = EPA;
+            break;
+
+          case 'F':
+            channel_model = EVA;
+            break;
+
+          case 'G':
+            channel_model = ETU;
+            break;
+
+          default:
+            msg("Unsupported channel model!\n");
+            exit(-1);
+        }
+
+        break;
+
+      /*case 'i':
+        interf1 = atoi(optarg);
+        break;
+
+      case 'j':
+        interf2 = atoi(optarg);
+        break;*/
+
+      case 'n':
+        n_trials = atoi(optarg);
+        break;
+
+      case 's':
+        snr0 = atof(optarg);
+        msg("Setting SNR0 to %f\n", snr0);
+        break;
+
+      case 'S':
+        snr1 = atof(optarg);
+        snr1set = 1;
+        msg("Setting SNR1 to %f\n", snr1);
+        break;
+
+      case 'p':
+        extended_prefix_flag = 1;
+        break;
+
+      /*
+       case 'r':
+       ricean_factor = pow(10,-.1*atof(optarg));
+       if (ricean_factor>1) {
+       printf("Ricean factor must be between 0 and 1\n");
+       exit(-1);
+       }
+       break;
+       */
+
+      case 'y':
+        n_tx = atoi(optarg);
+
+        if ((n_tx == 0) || (n_tx > 2)) {
+          msg("Unsupported number of tx antennas %d\n", n_tx);
+          exit(-1);
+        }
+
+        break;
+
+      case 'z':
+        n_rx = atoi(optarg);
+
+        if ((n_rx == 0) || (n_rx > 2)) {
+          msg("Unsupported number of rx antennas %d\n", n_rx);
+          exit(-1);
+        }
+
+        break;
+
+      case 'M':
+        SSB_positions = atoi(optarg);
+        break;
+
+      case 'N':
+        Nid_cell = atoi(optarg);
+        break;
+
+      case 'R':
+        N_RB_DL = atoi(optarg);
+        N_RB_UL = N_RB_DL;
+        break;
+
+      case 'F':
+        input_fd = fopen(optarg, "r");
+
+        if (input_fd == NULL) {
+            printf("Problem with filename %s\n", optarg);
+            exit(-1);
+        }
+
+        break;
+
+      case 'P':
+        pbch_phase = atoi(optarg);
+
+        if (pbch_phase > 3)
+          printf("Illegal PBCH phase (0-3) got %d\n", pbch_phase);
+
+        break;
+
+      case 'm':
+        Imcs = atoi(optarg);
+        break;
+
+      case 'l':
+        nb_symb_sch = atoi(optarg);
+        break;
+
+      case 'r':
+        nb_rb = atoi(optarg);
+        break;
+
+      /*case 'x':
+        transmission_mode = atoi(optarg);
+        break;*/
+
+      default:
+        case 'h':
+          printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n", argv[0]);
+          printf("-h This message\n");
+          printf("-p Use extended prefix mode\n");
+          //printf("-d Use TDD\n");
+          printf("-n Number of frames to simulate\n");
+          printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB.  If n_frames is 1 then just SNR is simulated\n");
+          printf("-S Ending SNR, runs from SNR0 to SNR1\n");
+          printf("-t Delay spread for multipath channel\n");
+          printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
+          //printf("-x Transmission mode (1,2,6 for the moment)\n");
+          printf("-y Number of TX antennas used in eNB\n");
+          printf("-z Number of RX antennas used in UE\n");
+          //printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n");
+          //printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
+          printf("-M Multiple SSB positions in burst\n");
+          printf("-N Nid_cell\n");
+          printf("-R N_RB_DL\n");
+          printf("-O oversampling factor (1,2,4,8,16)\n");
+          printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
+          //printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
+          //printf("-f Output filename (.txt format) for Pe/SNR results\n");
+          printf("-F Input filename (.txt format) for RX conformance testing\n");
+          exit(-1);
+          break;
+    }
+  }
+
+  logInit();
+  set_glog(loglvl);
+  T_stdout = 1;
+
+  if (snr1set == 0)
+    snr1 = snr0 + 10;
+
+  gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model,
+                                61.44e6, //N_RB2sampling_rate(N_RB_DL),
+                                40e6, //N_RB2channel_bandwidth(N_RB_DL),
+                                0, 0, 0);
+
+  if (gNB2UE == NULL) {
+    msg("Problem generating channel model. Exiting.\n");
+    exit(-1);
+  }
+
+  RC.gNB = (PHY_VARS_gNB ** *) malloc(sizeof(PHY_VARS_gNB **));
+  RC.gNB[0] = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *));
+  RC.gNB[0][0] = malloc(sizeof(PHY_VARS_gNB));
+  gNB = RC.gNB[0][0];
+  //gNB_config = &gNB->gNB_config;
+
+  frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
+  frame_parms->nb_antennas_tx = n_tx;
+  frame_parms->nb_antennas_rx = n_rx;
+  frame_parms->N_RB_DL = N_RB_DL;
+  frame_parms->N_RB_UL = N_RB_UL;
+  frame_parms->Ncp = extended_prefix_flag ? EXTENDED : NORMAL;
+
+  crcTableInit();
+
+  nr_phy_config_request_sim(gNB, N_RB_DL, N_RB_DL, mu, Nid_cell, SSB_positions);
+
+  phy_init_nr_gNB(gNB, 0, 0);
+  //init_eNB_afterRU();
+
+  frame_length_complex_samples = frame_parms->samples_per_subframe;
+  //frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP;
+  s_re   = malloc(2 * sizeof(double *));
+  s_im   = malloc(2 * sizeof(double *));
+  r_re   = malloc(2 * sizeof(double *));
+  r_im   = malloc(2 * sizeof(double *));
+  txdata = malloc(2 * sizeof(int *   ));
+
+  for (i = 0; i < 2; i++) {
+    s_re[i] = malloc(frame_length_complex_samples * sizeof(double));
+    bzero(s_re[i], frame_length_complex_samples * sizeof(double));
+    s_im[i] = malloc(frame_length_complex_samples * sizeof(double));
+    bzero(s_im[i], frame_length_complex_samples * sizeof(double));
+    r_re[i] = malloc(frame_length_complex_samples * sizeof(double));
+    bzero(r_re[i], frame_length_complex_samples * sizeof(double));
+    r_im[i] = malloc(frame_length_complex_samples * sizeof(double));
+    bzero(r_im[i], frame_length_complex_samples * sizeof(double));
+    txdata[i] = malloc(frame_length_complex_samples * sizeof(int));
+    bzero(r_re[i], frame_length_complex_samples * sizeof(int)); // [hna] r_re should be txdata
+  }
+
+  if (pbch_file_fd != NULL) {
+    load_pbch_desc(pbch_file_fd);
+  }
+
+  /*  for (int k=0; k<2; k++) {
+   // Create transport channel structures for 2 transport blocks (MIMO)
+   for (i=0; i<2; i++) {
+   gNB->dlsch[k][i] = new_gNB_dlsch(Kmimo,8,Nsoft,0,frame_parms,gNB_config);
+
+   if (!gNB->dlsch[k][i]) {
+   printf("Can't get eNB dlsch structures\n");
+   exit(-1);
+   }
+   gNB->dlsch[k][i]->Nsoft = 10;
+   gNB->dlsch[k][i]->rnti = n_rnti+k;
+   }
+   }*/
+  //configure UE
+  UE = malloc(sizeof(PHY_VARS_NR_UE));
+  memcpy(&UE->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS));
+
+  //phy_init_nr_top(frame_parms);
+  if (init_nr_ue_signal(UE, 1, 0) != 0) {
+    printf("Error at UE NR initialisation\n");
+    exit(-1);
+  }
+
+  //nr_init_frame_parms_ue(&UE->frame_parms);
+  //init_nr_ue_transport(UE, 0);
+  for (sf = 0; sf < 2; sf++) {
+    for (i = 0; i < 2; i++) {
+
+        UE->ulsch[sf][0][i] = new_nr_ue_ulsch(N_RB_UL, 8, 0);
+
+        if (!UE->ulsch[sf][0][i]) {
+          printf("Can't get ue ulsch structures\n");
+          exit(-1);
+        }
+
+    }
+  }
+
+  UE->dlsch_SI[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0);
+  UE->dlsch_ra[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0);
+
+  unsigned char harq_pid = 0; //dlsch->harq_ids[subframe];
+  //time_stats_t *rm_stats, *te_stats, *i_stats;
+  uint8_t is_crnti = 0, llr8_flag = 0;
+  unsigned int TBS = 8424;
+  unsigned int available_bits;
+  uint8_t nb_re_dmrs = 6;
+  uint16_t length_dmrs = 1;
+  unsigned char mod_order;
+  uint8_t Nl = 1;
+  uint8_t rvidx = 0;
+  uint8_t UE_id = 1;
+
+  NR_gNB_ULSCH_t *ulsch_gNB = gNB->ulsch[UE_id][0];
+  nfapi_nr_ul_config_ulsch_pdu_rel15_t *rel15_ul = &ulsch_gNB->harq_processes[harq_pid]->ulsch_pdu.ulsch_pdu_rel15;
+
+  NR_UE_ULSCH_t *ulsch_ue = UE->ulsch[0][0][0];
+
+  ulsch_ue->nb_re_dmrs = nb_re_dmrs; //[adk] A HOT FIX until cearting nfapi_nr_ul_config_ulsch_pdu_rel15_t
+
+  mod_order = nr_get_Qm(Imcs, 1);
+  available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, 1);
+  TBS = nr_compute_tbs(Imcs, nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, Nl);
+  printf("available bits %d TBS %d mod_order %d\n", available_bits, TBS, mod_order);
+
+  /////////// setting rel15_ul parameters ///////////
+  rel15_ul->number_rbs     = nb_rb;
+  rel15_ul->number_symbols = nb_symb_sch;
+  rel15_ul->Qm             = mod_order;
+  rel15_ul->mcs            = Imcs;
+  rel15_ul->rv             = rvidx;
+  rel15_ul->n_layers       = Nl;
+  ///////////////////////////////////////////////////
+
+  double *modulated_input = malloc16(sizeof(double) * 16 * 68 * 384); // [hna] 16 segments, 68*Zc
+  short *channel_output_fixed = malloc16(sizeof(short) * 16 * 68 * 384);
+  short *channel_output_uncoded = malloc16(sizeof(unsigned short) * 16 * 68 * 384);
+  unsigned int errors_bit_uncoded = 0;
+  // unsigned char *estimated_output;
+  unsigned char *estimated_output_bit;
+  unsigned char *test_input_bit;
+  unsigned int errors_bit = 0;
+
+  test_input_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+  // estimated_output = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+  estimated_output_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+
+  unsigned char *test_input;
+  test_input = (unsigned char *) malloc16(sizeof(unsigned char) * TBS / 8);
+
+  for (i = 0; i < TBS / 8; i++)
+    test_input[i] = (unsigned char) rand();
+
+  // estimated_output = ulsch_gNB->harq_processes[harq_pid]->b;
+
+  /////////////////////////[adk] preparing UL harq_process parameters/////////////////////////
+  ///////////
+  NR_UL_UE_HARQ_t *harq_process_ul_ue = ulsch_ue->harq_processes[harq_pid];
+
+  if (harq_process_ul_ue) {
+
+    harq_process_ul_ue->mcs = Imcs;
+    harq_process_ul_ue->Nl = Nl;
+    harq_process_ul_ue->nb_rb = nb_rb;
+    harq_process_ul_ue->nb_symbols = nb_symb_sch;
+    harq_process_ul_ue->rvidx = rvidx;
+    harq_process_ul_ue->TBS = TBS;
+    harq_process_ul_ue->a = &test_input[0];
+
+  }
+  ///////////
+  ////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef DEBUG_ULSCHSIM
+  for (i = 0; i < TBS / 8; i++) printf("test_input[i]=%d \n",test_input[i]);
+#endif
+
+  /*for (int i=0; i<TBS/8; i++)
+   printf("test input[%d]=%d \n",i,test_input[i]);*/
+
+  //printf("crc32: [0]->0x%08x\n",crc24c(test_input, 32));
+  // generate signal
+
+  /////////////////////////[adk] ULSCH coding/////////////////////////
+  ///////////
+
+  if (input_fd == NULL) {
+    nr_ulsch_encoding(ulsch_ue, frame_parms, harq_pid);
+  }
+
+  ///////////
+  ////////////////////////////////////////////////////////////////////
+
+
+  for (SNR = snr0; SNR < snr1; SNR += snr_step) {
+    n_errors = 0;
+    n_false_positive = 0;
+
+    for (trial = 0; trial < n_trials; trial++) {
+
+      errors_bit_uncoded = 0;
+
+      for (i = 0; i < available_bits; i++) {
+
+#ifdef DEBUG_CODER
+        if ((i&0xf)==0)
+          printf("\ne %d..%d:    ",i,i+15);
+#endif
+        /*
+            if (i<16){
+               printf("dlsch_encoder output f[%d] = %d\n",i,dlsch->harq_processes[0]->f[i]);
+               printf("ulsch_encoder output f[%d] = %d\n",i,ulsch_ue->harq_processes[0]->f[i]);
+            }
+        */
+
+        if (ulsch_ue->harq_processes[0]->f[i] == 0)
+          modulated_input[i] = 1.0;        ///sqrt(2);  //QPSK
+        else
+          modulated_input[i] = -1.0;        ///sqrt(2);
+  
+        //if (i<16) printf("modulated_input[%d] = %d\n",i,modulated_input[i]);
+        //SNR =10;
+
+        SNR_lin = pow(10, SNR / 10.0);
+        sigma = 1.0 / sqrt(2 * SNR_lin);
+#if 1
+        channel_output_fixed[i] = (short) quantize(sigma / 4.0 / 4.0,
+                                                   modulated_input[i] + sigma * gaussdouble(0.0, 1.0),
+                                                   qbits);
+#else
+        channel_output_fixed[i] = (short) quantize(0.01, modulated_input[i], qbits);
+#endif
+        //channel_output_fixed[i] = (char)quantize8bit(sigma/4.0,(2.0*modulated_input[i]) - 1.0 + sigma*gaussdouble(0.0,1.0));
+        //printf("llr[%d]=%d\n",i,channel_output_fixed[i]);
+        //printf("channel_output_fixed[%d]: %d\n",i,channel_output_fixed[i]);
+
+        //channel_output_fixed[i] = (char)quantize(1,channel_output_fixed[i],qbits);
+
+        //if (i<16)   printf("channel_output_fixed[%d] = %d\n",i,channel_output_fixed[i]);
+
+        //Uncoded BER
+        if (channel_output_fixed[i] < 0)
+          channel_output_uncoded[i] = 1;  //QPSK demod
+        else
+          channel_output_uncoded[i] = 0;
+
+        if (channel_output_uncoded[i] != ulsch_ue->harq_processes[harq_pid]->f[i])
+          errors_bit_uncoded = errors_bit_uncoded + 1;
+      }
+
+      //if (errors_bit_uncoded>10)
+      printf("errors bits uncoded %u\n", errors_bit_uncoded);
+
+#ifdef DEBUG_CODER
+      printf("\n");
+      exit(-1);
+#endif
+
+      ret = nr_ulsch_decoding(gNB, UE_id, channel_output_fixed, frame_parms,
+                              frame, nb_symb_sch, subframe, harq_pid, is_crnti, llr8_flag);
+
+      if (ret > ulsch_gNB->max_ldpc_iterations)
+        n_errors++;
+
+      //count errors
+      errors_bit = 0;
+
+      for (i = 0; i < TBS; i++) {
+        estimated_output_bit[i] = (ulsch_gNB->harq_processes[harq_pid]->b[i/8] & (1 << (i & 7))) >> (i & 7);
+        test_input_bit[i] = (test_input[i / 8] & (1 << (i & 7))) >> (i & 7); // Further correct for multiple segments
+
+        if (estimated_output_bit[i] != test_input_bit[i]) {
+          errors_bit++;
+          //printf("estimated bits error occurs @%d ",i);
+        }
+      }
+
+      if (errors_bit > 0) {
+        n_false_positive++;
+        if (n_trials == 1)
+          printf("errors_bit %d (trial %d)\n", errors_bit, trial);
+      }
+    }
+    
+    printf("*****************************************\n");
+    printf("SNR %f, BLER %f (false positive %f)\n", SNR,
+           (float) n_errors / (float) n_trials,
+           (float) n_false_positive / (float) n_trials);
+    printf("*****************************************\n");
+
+    if ((float) n_errors / (float) n_trials < target_error_rate) {
+      printf("PUSCH test OK\n");
+      break;
+    }
+  }
+
+  /*LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1);
+   if (gNB->frame_parms.nb_antennas_tx>1)
+   LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1);*/
+
+  //TODO: loop over slots
+  /*for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) {
+   if (gNB_config->subframe_config.dl_cyclic_prefix_type.value == 1) {
+   PHY_ofdm_mod(gNB->common_vars.txdataF[aa],
+   txdata[aa],
+   frame_parms->ofdm_symbol_size,
+   12,
+   frame_parms->nb_prefix_samples,
+   CYCLIC_PREFIX);
+   } else {
+   nr_normal_prefix_mod(gNB->common_vars.txdataF[aa],
+   txdata[aa],
+   14,
+   frame_parms);
+   }
+   }
+
+   LOG_M("txsig0.m","txs0", txdata[0],frame_length_complex_samples,1,1);
+   if (gNB->frame_parms.nb_antennas_tx>1)
+   LOG_M("txsig1.m","txs1", txdata[1],frame_length_complex_samples,1,1);
+
+
+   for (i=0; i<frame_length_complex_samples; i++) {
+   for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
+   r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
+   r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
+   }
+   }*/
+
+  for (i = 0; i < 2; i++) {
+
+    printf("----------------------\n");
+    printf("freeing codeword %d\n", i);
+    printf("----------------------\n");
+
+    printf("gNB ulsch[0][%d]\n", i); // [hna] ulsch[0] is for RA
+
+    free_gNB_ulsch(gNB->ulsch[0][i]);
+
+    printf("gNB ulsch[%d][%d]\n",UE_id, i);
+
+    free_gNB_ulsch(gNB->ulsch[UE_id][i]);
+
+    for (sf = 0; sf < 2; sf++) {
+
+      printf("UE  ulsch[%d][0][%d]\n", sf, i);
+
+      if (UE->ulsch[sf][0][i])
+        free_nr_ue_ulsch(UE->ulsch[sf][0][i]);
+    }
+
+    printf("\n");
+  }
+
+  for (i = 0; i < 2; i++) {
+    free(s_re[i]);
+    free(s_im[i]);
+    free(r_re[i]);
+    free(r_im[i]);
+    free(txdata[i]);
+  }
+
+  free(s_re);
+  free(s_im);
+  free(r_re);
+  free(r_im);
+  free(txdata);
+
+  if (output_fd)
+    fclose(output_fd);
+
+  if (input_fd)
+    fclose(input_fd);
+
+  return (n_errors);
+}
+