ulsim.c 74.2 KB
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/*******************************************************************************
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    OpenAirInterface
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    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
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   see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
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  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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 *******************************************************************************/
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/*! \file ulsim.c
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 \brief Top-level UL simulator
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 \author R. Knopp
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 \date 2011 - 2014
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 \version 0.1
 \company Eurecom
 \email: knopp@eurecom.fr
 \note
 \warning
*/

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#include <string.h>
#include <math.h>
#include <unistd.h>
#include "SIMULATION/TOOLS/defs.h"
#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/vars.h"
#include "MAC_INTERFACE/vars.h"

#include "SCHED/defs.h"
#include "SCHED/vars.h"
#include "LAYER2/MAC/vars.h"
#include "OCG_vars.h"

#ifdef XFORMS
#include "PHY/TOOLS/lte_phy_scope.h"
#endif

extern unsigned short dftsizes[33];
extern short *ul_ref_sigs[30][2][33];
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PHY_VARS_eNB *PHY_vars_eNB;
PHY_VARS_UE *PHY_vars_UE;

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//#define MCS_COUNT 23//added for PHY abstraction
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channel_desc_t *eNB2UE[NUMBER_OF_eNB_MAX][NUMBER_OF_UE_MAX];
channel_desc_t *UE2eNB[NUMBER_OF_UE_MAX][NUMBER_OF_eNB_MAX];
//Added for PHY abstraction
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node_desc_t *enb_data[NUMBER_OF_eNB_MAX];
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node_desc_t *ue_data[NUMBER_OF_UE_MAX];
//double sinr_bler_map[MCS_COUNT][2][16];

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extern uint16_t beta_ack[16],beta_ri[16],beta_cqi[16];
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//extern  char* namepointer_chMag ;


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#ifdef XFORMS
FD_lte_phy_scope_enb *form_enb;
char title[255];
#endif

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/*the following parameters are used to control the processing times*/
double t_tx_max = -1000000000; /*!< \brief initial max process time for tx */
double t_rx_max = -1000000000; /*!< \brief initial max process time for rx */
double t_tx_min = 1000000000; /*!< \brief initial min process time for tx */
double t_rx_min = 1000000000; /*!< \brief initial min process time for tx */
int n_tx_dropped = 0; /*!< \brief initial max process time for tx */
int n_rx_dropped = 0; /*!< \brief initial max process time for rx */

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int main(int argc, char **argv)
{
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  char c;
  int i,j,aa,u;

  int aarx,aatx;
  double channelx,channely;
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  double sigma2, sigma2_dB=10,SNR,SNR2,snr0=-2.0,snr1,SNRmeas,rate,saving_bler=0;
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  double input_snr_step=.2,snr_int=30;
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  double blerr;

  int **txdata;

  LTE_DL_FRAME_PARMS *frame_parms;
  double **s_re,**s_im,**r_re,**r_im;
  double forgetting_factor=0.0; //in [0,1] 0 means a new channel every time, 1 means keep the same channel
  double iqim=0.0;
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  uint8_t extended_prefix_flag=0;
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  int cqi_flag=0,cqi_error,cqi_errors,ack_errors,cqi_crc_falsepositives,cqi_crc_falsenegatives;
  int ch_realization;
  int eNB_id = 0;
  int chMod = 0 ;
  int UE_id = 0;
  unsigned char nb_rb=25,first_rb=0,mcs=0,round=0,bundling_flag=1;
  unsigned char l;

  unsigned char awgn_flag = 0 ;
  SCM_t channel_model=Rice1;


  unsigned char *input_buffer,harq_pid;
  unsigned short input_buffer_length;
  unsigned int ret;
  unsigned int coded_bits_per_codeword,nsymb;
  int subframe=3;
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  unsigned int tx_lev=0,tx_lev_dB,trials,errs[4]= {0,0,0,0},round_trials[4]= {0,0,0,0};
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  uint8_t transmission_mode=1,n_rx=1;
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  FILE *bler_fd=NULL;
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  char bler_fname[512];
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  FILE *time_meas_fd=NULL;
  char time_meas_fname[256];
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  FILE *input_fdUL=NULL,*trch_out_fdUL=NULL;
  //  unsigned char input_file=0;
  char input_val_str[50],input_val_str2[50];
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  //  FILE *rx_frame_file;
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  FILE *csv_fdUL=NULL;
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  /*
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  FILE *fperen=NULL;
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  char fperen_name[512];

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  FILE *fmageren=NULL;
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  char fmageren_name[512];
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  FILE *flogeren=NULL;
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  char flogeren_name[512];
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  */
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  /* FILE *ftxlev;
     char ftxlev_name[512];
  */
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  char csv_fname[512];
  int n_frames=5000;
  int n_ch_rlz = 1;
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  int abstx = 0;
  int hold_channel=0;
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  channel_desc_t *UE2eNB;

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  uint8_t control_only_flag = 0;
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  int delay = 0;
  double maxDoppler = 0.0;
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  uint8_t srs_flag = 0;
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  uint8_t N_RB_DL=25,osf=1;
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  uint8_t cyclic_shift = 0;
  uint8_t cooperation_flag = 0; //0 no cooperation, 1 delay diversity, 2 Alamouti
  uint8_t beta_ACK=0,beta_RI=0,beta_CQI=2;
  uint8_t tdd_config=3,frame_type=FDD;
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  uint8_t N0=30;
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  double tx_gain=1.0;
  double cpu_freq_GHz;
  int avg_iter,iter_trials;

  uint32_t UL_alloc_pdu;
  int s,Kr,Kr_bytes;
  int dump_perf=0;
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  int test_perf=0;
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  int dump_table =0;

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  double effective_rate=0.0;
  char channel_model_input[10];
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  uint8_t max_turbo_iterations=4;
  uint8_t llr8_flag=0;
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  int nb_rb_set = 0;
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  int sf;
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  int threequarter_fs=0;
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  opp_enabled=1; // to enable the time meas

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  cpu_freq_GHz = (double)get_cpu_freq_GHz();
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  printf("Detected cpu_freq %f GHz\n",cpu_freq_GHz);


  logInit();

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  while ((c = getopt (argc, argv, "hapZEbm:n:Y:X:x:s:w:e:q:d:D:O:c:r:i:f:y:c:oA:C:R:g:N:l:S:T:QB:PI:L")) != -1) {
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    switch (c) {
    case 'a':
      channel_model = AWGN;
      chMod = 1;
      break;
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    case 'b':
      bundling_flag = 0;
      break;
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    case 'd':
      delay = atoi(optarg);
      break;
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    case 'D':
      maxDoppler = atoi(optarg);
      break;
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    case 'm':
      mcs = atoi(optarg);
      break;
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    case 'n':
      n_frames = atoi(optarg);
      break;
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    case 'Y':
      n_ch_rlz = atoi(optarg);
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      break;

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    case 'X':
      abstx= atoi(optarg);
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      break;

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    case 'g':
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      sprintf(channel_model_input,optarg,10);
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      switch((char)*optarg) {
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      case 'A':
        channel_model=SCM_A;
        chMod = 2;
        break;

      case 'B':
        channel_model=SCM_B;
        chMod = 3;
        break;

      case 'C':
        channel_model=SCM_C;
        chMod = 4;
        break;

      case 'D':
        channel_model=SCM_D;
        chMod = 5;
        break;

      case 'E':
        channel_model=EPA;
        chMod = 6;
        break;

      case 'F':
        channel_model=EVA;
        chMod = 7;
        break;

      case 'G':
        channel_model=ETU;
        chMod = 8;
        break;

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      case 'H':
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        channel_model=Rayleigh8;
        chMod = 9;
        break;

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      case 'I':
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        channel_model=Rayleigh1;
        chMod = 10;
        break;

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      case 'J':
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        channel_model=Rayleigh1_corr;
        chMod = 11;
        break;

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      case 'K':
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        channel_model=Rayleigh1_anticorr;
        chMod = 12;
        break;

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      case 'L':
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        channel_model=Rice8;
        chMod = 13;
        break;

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      case 'M':
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        channel_model=Rice1;
        chMod = 14;
        break;

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      case 'N':
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        channel_model=AWGN;
        chMod = 1;
        break;

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      default:
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        msg("Unsupported channel model!\n");
        exit(-1);
        break;
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      }
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      break;
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    case 's':
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      snr0 = atof(optarg);
      break;
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    case 'w':
      snr_int = atof(optarg);
      break;
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    case 'e':
      input_snr_step= atof(optarg);
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      break;
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    case 'x':
      transmission_mode=atoi(optarg);
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      if ((transmission_mode!=1) &&
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          (transmission_mode!=2)) {
        msg("Unsupported transmission mode %d\n",transmission_mode);
        exit(-1);
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      }
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      break;
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    case 'y':
      n_rx = atoi(optarg);
      break;
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    case 'S':
      subframe = atoi(optarg);
      break;
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    case 'T':
      tdd_config=atoi(optarg);
      frame_type=TDD;
      break;
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    case 'p':
      extended_prefix_flag=1;
      break;
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    case 'r':
      nb_rb = atoi(optarg);
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      nb_rb_set = 1;
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      break;
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    case 'f':
      first_rb = atoi(optarg);
      break;
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    case 'c':
      cyclic_shift = atoi(optarg);
      break;
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    case 'E':
      threequarter_fs=1;
      break;

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    case 'N':
      N0 = atoi(optarg);
      break;
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    case 'o':
      srs_flag = 1;
      break;

    case 'i':
      input_fdUL = fopen(optarg,"r");
      msg("Reading in %s (%p)\n",optarg,input_fdUL);
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      if (input_fdUL == (FILE*)NULL) {
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        msg("Unknown file %s\n",optarg);
        exit(-1);
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      }
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      //      input_file=1;
      break;
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    case 'A':
      beta_ACK = atoi(optarg);
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      if (beta_ACK>15) {
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        printf("beta_ack must be in (0..15)\n");
        exit(-1);
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      }
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      break;
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    case 'C':
      beta_CQI = atoi(optarg);
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      if ((beta_CQI>15)||(beta_CQI<2)) {
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        printf("beta_cqi must be in (2..15)\n");
        exit(-1);
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      }
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      break;
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    case 'R':
      beta_RI = atoi(optarg);
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      if ((beta_RI>15)||(beta_RI<2)) {
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        printf("beta_ri must be in (0..13)\n");
        exit(-1);
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      }
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      break;
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    case 'Q':
      cqi_flag=1;
      break;
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    case 'B':
      N_RB_DL=atoi(optarg);
      break;
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    case 'P':
      dump_perf=1;
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      opp_enabled=1;
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      break;
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    case 'O':
      test_perf=atoi(optarg);
      //print_perf =1;
      break;
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    case 'L':
      llr8_flag=1;
      break;
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    case 'I':
      max_turbo_iterations=atoi(optarg);
      break;
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    case 'Z':
      dump_table = 1;
      break;
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    case 'h':
    default:
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      printf("%s -h(elp) -a(wgn on) -m mcs -n n_frames -s snr0 -t delay_spread -p (extended prefix on) -r nb_rb -f first_rb -c cyclic_shift -o (srs on) -g channel_model [A:M] Use 3GPP 25.814 SCM-A/B/C/D('A','B','C','D') or 36-101 EPA('E'), EVA ('F'),ETU('G') models (ignores delay spread and Ricean factor), Rayghleigh8 ('H'), Rayleigh1('I'), Rayleigh1_corr('J'), Rayleigh1_anticorr ('K'), Rice8('L'), Rice1('M'), -d Channel delay, -D maximum Doppler shift \n",
             argv[0]);
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      exit(1);
      break;
    }
  }
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  lte_param_init(1,
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                 1, 
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		 n_rx,
		 1,
		 extended_prefix_flag,
		 frame_type,
		 0,
		 tdd_config,
		 N_RB_DL,
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		 threequarter_fs,
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		 osf,
		 0);
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  if (nb_rb_set == 0)
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    nb_rb = PHY_vars_eNB->lte_frame_parms.N_RB_UL;
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  printf("1 . rxdataF_comp[0] %p\n",PHY_vars_eNB->lte_eNB_pusch_vars[0]->rxdataF_comp[0][0]);
  printf("Setting mcs = %d\n",mcs);
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  printf("n_frames = %d\n", n_frames);
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  snr1 = snr0+snr_int;
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  printf("SNR0 %f, SNR1 %f\n",snr0,snr1);

  /*
    txdataF    = (int **)malloc16(2*sizeof(int*));
    txdataF[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
    txdataF[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
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    txdata    = (int **)malloc16(2*sizeof(int*));
    txdata[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
    txdata[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
  */

  frame_parms = &PHY_vars_eNB->lte_frame_parms;

  txdata = PHY_vars_UE->lte_ue_common_vars.txdata;

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  s_re = malloc(2*sizeof(double*));
  s_im = malloc(2*sizeof(double*));
  r_re = malloc(2*sizeof(double*));
  r_im = malloc(2*sizeof(double*));
  //  r_re0 = malloc(2*sizeof(double*));
  //  r_im0 = malloc(2*sizeof(double*));

  nsymb = (PHY_vars_eNB->lte_frame_parms.Ncp == 0) ? 14 : 12;
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  coded_bits_per_codeword = nb_rb * (12 * get_Qm(mcs)) * nsymb;

  rate = (double)dlsch_tbs25[get_I_TBS(mcs)][nb_rb-1]/(coded_bits_per_codeword);

  printf("Rate = %f (mod %d), coded bits %d\n",rate,get_Qm(mcs),coded_bits_per_codeword);
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  sprintf(bler_fname,"ULbler_mcs%d_nrb%d_ChannelModel%d_nsim%d.csv",mcs,nb_rb,chMod,n_frames);
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  bler_fd = fopen(bler_fname,"w");
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  if (bler_fd==NULL) {
    fprintf(stderr,"Problem creating file %s\n",bler_fname);
    exit(-1);
  }
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  fprintf(bler_fd,"#SNR;mcs;nb_rb;TBS;rate;errors[0];trials[0];errors[1];trials[1];errors[2];trials[2];errors[3];trials[3]\n");
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  if (test_perf != 0) {
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    char hostname[1024];
    hostname[1023] = '\0';
    gethostname(hostname, 1023);
    printf("Hostname: %s\n", hostname);
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    //char dirname[FILENAME_MAX];
    //sprintf(dirname, "%s//SIMU/USER/pre-ci-logs-%s", getenv("OPENAIR_TARGETS"),hostname);
    //mkdir(dirname, 0777);
    sprintf(time_meas_fname,"time_meas_prb%d_mcs%d_antrx%d_channel%s_tx%d.csv",
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            N_RB_DL,mcs,n_rx,channel_model_input,transmission_mode);
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    time_meas_fd = fopen(time_meas_fname,"w");
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    if (time_meas_fd==NULL) {
      fprintf(stderr,"Cannot create file %s!\n",time_meas_fname);
      exit(-1);
    }
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  }
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  /*
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  if(abstx) {
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    sprintf(fperen_name,"ULchan_estims_F_mcs%d_rb%d_chanMod%d_nframes%d_chanReal%d.m",mcs,nb_rb,chMod,n_frames,n_ch_rlz);
    fperen = fopen(fperen_name,"a+");
    fprintf(fperen,"chest_f = [");
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    fclose(fperen);

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    sprintf(fmageren_name,"ChanMag_F_mcs%d_rb%d_chanMod%d_nframes%d_chanReal%d.m",mcs,nb_rb,chMod,n_frames,n_ch_rlz);
    fmageren = fopen(fmageren_name,"a+");
    fprintf(fmageren,"mag_f = [");
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    fclose(fmageren);

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    sprintf(flogeren_name,"Log2Max_mcs%d_rb%d_chanMod%d_nframes%d_chanReal%d.m",mcs,nb_rb,chMod,n_frames,n_ch_rlz);
    flogeren = fopen(flogeren_name,"a+");
    fprintf(flogeren,"mag_f = [");
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    fclose(flogeren);
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  }
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  */
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  /*
    sprintf(ftxlev_name,"txlevel_mcs%d_rb%d_chanMod%d_nframes%d_chanReal%d.m",mcs,nb_rb,chMod,n_frames,n_ch_rlz);
    ftxlev = fopen(ftxlev_name,"a+");
    fprintf(ftxlev,"txlev = [");
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    fclose(ftexlv);
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  */
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  if(abstx) {
    // CSV file
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    sprintf(csv_fname,"EULdataout_tx%d_mcs%d_nbrb%d_chan%d_nsimus%d_eren.m",transmission_mode,mcs,nb_rb,chMod,n_frames);
    csv_fdUL = fopen(csv_fname,"w");
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    if (csv_fdUL == NULL) {
      fprintf(stderr,"Problem opening file %s\n",csv_fname);
      exit(-1);
    }
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    fprintf(csv_fdUL,"data_all%d=[",mcs);
  }
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  for (i=0; i<2; i++) {
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    s_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    s_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    r_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    r_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    //    r_re0[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    //    bzero(r_re0[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    //    r_im0[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    //    bzero(r_im0[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
  }


#ifdef XFORMS
  fl_initialize (&argc, argv, NULL, 0, 0);
  form_enb = create_lte_phy_scope_enb();
  sprintf (title, "LTE PHY SCOPE eNB");
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  fl_show_form (form_enb->lte_phy_scope_enb, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);
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#endif

  PHY_vars_UE->lte_ue_pdcch_vars[0]->crnti = 14;

  PHY_vars_UE->lte_frame_parms.soundingrs_ul_config_common.srs_BandwidthConfig = 2;
  PHY_vars_UE->lte_frame_parms.soundingrs_ul_config_common.srs_SubframeConfig = 7;
  PHY_vars_UE->soundingrs_ul_config_dedicated[eNB_id].srs_Bandwidth = 0;
  PHY_vars_UE->soundingrs_ul_config_dedicated[eNB_id].transmissionComb = 0;
  PHY_vars_UE->soundingrs_ul_config_dedicated[eNB_id].freqDomainPosition = 0;

  PHY_vars_eNB->lte_frame_parms.soundingrs_ul_config_common.srs_BandwidthConfig = 2;
  PHY_vars_eNB->lte_frame_parms.soundingrs_ul_config_common.srs_SubframeConfig = 7;

  PHY_vars_eNB->soundingrs_ul_config_dedicated[UE_id].srs_ConfigIndex = 1;
  PHY_vars_eNB->soundingrs_ul_config_dedicated[UE_id].srs_Bandwidth = 0;
  PHY_vars_eNB->soundingrs_ul_config_dedicated[UE_id].transmissionComb = 0;
  PHY_vars_eNB->soundingrs_ul_config_dedicated[UE_id].freqDomainPosition = 0;
  PHY_vars_eNB->cooperation_flag = cooperation_flag;
  //  PHY_vars_eNB->eNB_UE_stats[0].SRS_parameters = PHY_vars_UE->SRS_parameters;

  PHY_vars_eNB->pusch_config_dedicated[UE_id].betaOffset_ACK_Index = beta_ACK;
  PHY_vars_eNB->pusch_config_dedicated[UE_id].betaOffset_RI_Index  = beta_RI;
  PHY_vars_eNB->pusch_config_dedicated[UE_id].betaOffset_CQI_Index = beta_CQI;
  PHY_vars_UE->pusch_config_dedicated[eNB_id].betaOffset_ACK_Index = beta_ACK;
  PHY_vars_UE->pusch_config_dedicated[eNB_id].betaOffset_RI_Index  = beta_RI;
  PHY_vars_UE->pusch_config_dedicated[eNB_id].betaOffset_CQI_Index = beta_CQI;
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  PHY_vars_UE->ul_power_control_dedicated[eNB_id].deltaMCS_Enabled = 1;
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  printf("PUSCH Beta : ACK %f, RI %f, CQI %f\n",(double)beta_ack[beta_ACK]/8,(double)beta_ri[beta_RI]/8,(double)beta_cqi[beta_CQI]/8);

  UE2eNB = new_channel_desc_scm(PHY_vars_eNB->lte_frame_parms.nb_antennas_tx,
                                PHY_vars_UE->lte_frame_parms.nb_antennas_rx,
                                channel_model,
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				N_RB2sampling_rate(PHY_vars_eNB->lte_frame_parms.N_RB_UL),
				N_RB2channel_bandwidth(PHY_vars_eNB->lte_frame_parms.N_RB_UL),
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                                forgetting_factor,
                                delay,
                                0);
  // set Doppler
  UE2eNB->max_Doppler = maxDoppler;

  // NN: N_RB_UL has to be defined in ulsim
  PHY_vars_eNB->ulsch_eNB[0] = new_eNB_ulsch(8,max_turbo_iterations,N_RB_DL,0);
  PHY_vars_UE->ulsch_ue[0]   = new_ue_ulsch(8,N_RB_DL,0);
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  // Create transport channel structures for 2 transport blocks (MIMO)
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  for (i=0; i<2; i++) {
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    PHY_vars_eNB->dlsch_eNB[0][i] = new_eNB_dlsch(1,8,1827072,N_RB_DL,0,&PHY_vars_eNB->lte_frame_parms);
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    PHY_vars_UE->dlsch_ue[0][i]  = new_ue_dlsch(1,8,1827072,MAX_TURBO_ITERATIONS,N_RB_DL,0);
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    if (!PHY_vars_eNB->dlsch_eNB[0][i]) {
      printf("Can't get eNB dlsch structures\n");
      exit(-1);
    }
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    if (!PHY_vars_UE->dlsch_ue[0][i]) {
      printf("Can't get ue dlsch structures\n");
      exit(-1);
    }
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    PHY_vars_eNB->dlsch_eNB[0][i]->rnti = 14;
    PHY_vars_UE->dlsch_ue[0][i]->rnti   = 14;

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  } 
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  switch (PHY_vars_eNB->lte_frame_parms.N_RB_UL) {
  case 6:
    break;
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  case 25:
    if (PHY_vars_eNB->lte_frame_parms.frame_type == TDD) {
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->cshift  = 0;
      ((DCI0_5MHz_TDD_1_6_t*)&UL_alloc_pdu)->dai     = 1;
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    } else {
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      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
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      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
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      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_5MHz_FDD_t*)&UL_alloc_pdu)->cshift  = 0;
    }
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    break;
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  case 50:
    if (PHY_vars_eNB->lte_frame_parms.frame_type == TDD) {
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->cshift  = 0;
      ((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->dai     = 1;
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    } else {
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      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
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      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
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      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->cshift  = 0;
    }
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    break;
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  case 100:
    if (PHY_vars_eNB->lte_frame_parms.frame_type == TDD) {
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->cshift  = 0;
      ((DCI0_20MHz_TDD_1_6_t*)&UL_alloc_pdu)->dai     = 1;
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    } else {
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      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->type    = 0;
      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
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      printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB->lte_frame_parms.N_RB_UL,((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
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      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->mcs     = mcs;
      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->ndi     = 1;
      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->TPC     = 0;
      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
      ((DCI0_20MHz_FDD_t*)&UL_alloc_pdu)->cshift  = 0;
    }
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    break;
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  default:
    break;
  }


  PHY_vars_UE->PHY_measurements.rank[0] = 0;
  PHY_vars_UE->transmission_mode[0] = 2;
  PHY_vars_UE->pucch_config_dedicated[0].tdd_AckNackFeedbackMode = bundling_flag == 1 ? bundling : multiplexing;
  PHY_vars_eNB->transmission_mode[0] = 2;
  PHY_vars_eNB->pucch_config_dedicated[0].tdd_AckNackFeedbackMode = bundling_flag == 1 ? bundling : multiplexing;
  PHY_vars_UE->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupHoppingEnabled = 1;
  PHY_vars_eNB->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupHoppingEnabled = 1;
  PHY_vars_UE->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.sequenceHoppingEnabled = 0;
  PHY_vars_eNB->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.sequenceHoppingEnabled = 0;
  PHY_vars_UE->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupAssignmentPUSCH = 0;
  PHY_vars_eNB->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupAssignmentPUSCH = 0;
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  PHY_vars_UE->frame_tx=1;
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  for (sf=0; sf<10; sf++) {
    PHY_vars_eNB->proc[sf].frame_tx=1;
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    PHY_vars_eNB->proc[sf].subframe_tx=sf;
    PHY_vars_eNB->proc[sf].frame_rx=1;
    PHY_vars_eNB->proc[sf].subframe_rx=sf;
  }
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  msg("Init UL hopping UE\n");
  init_ul_hopping(&PHY_vars_UE->lte_frame_parms);
  msg("Init UL hopping eNB\n");
  init_ul_hopping(&PHY_vars_eNB->lte_frame_parms);

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  PHY_vars_eNB->proc[subframe].frame_rx = PHY_vars_UE->frame_tx;
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  if (ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB->lte_frame_parms,subframe) > subframe) // allocation was in previous frame
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    PHY_vars_eNB->proc[ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB->lte_frame_parms,subframe)].frame_tx = (PHY_vars_UE->frame_tx-1)&1023;
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  PHY_vars_UE->dlsch_ue[0][0]->harq_ack[ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB->lte_frame_parms,subframe)].send_harq_status = 1;


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  //  printf("UE frame %d, eNB frame %d (eNB frame_tx %d)\n",PHY_vars_UE->frame,PHY_vars_eNB->proc[subframe].frame_rx,PHY_vars_eNB->proc[ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB->lte_frame_parms,subframe)].frame_tx);
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  PHY_vars_UE->frame_tx = (PHY_vars_UE->frame_tx-1)&1023;
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  generate_ue_ulsch_params_from_dci((void *)&UL_alloc_pdu,
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                                    14,
                                    ul_subframe2pdcch_alloc_subframe(&PHY_vars_UE->lte_frame_parms,subframe),
                                    format0,
                                    PHY_vars_UE,
                                    SI_RNTI,
                                    0,
                                    P_RNTI,
                                    CBA_RNTI,
                                    0,
                                    srs_flag);
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  //  printf("RIV %d\n",UL_alloc_pdu.rballoc);

  generate_eNB_ulsch_params_from_dci((void *)&UL_alloc_pdu,
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                                     14,
                                     ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB->lte_frame_parms,subframe),
                                     format0,
                                     0,
                                     PHY_vars_eNB,
                                     SI_RNTI,
                                     0,
                                     P_RNTI,
                                     CBA_RNTI,
                                     srs_flag);
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  PHY_vars_UE->frame_tx = (PHY_vars_UE->frame_tx+1)&1023;
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  for (ch_realization=0; ch_realization<n_ch_rlz; ch_realization++) {

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    /*
      if(abstx){
      int ulchestim_f[300*12];
      int ulchestim_t[2*(frame_parms->ofdm_symbol_size)];
      }
    */
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    if(abstx) {
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      printf("**********************Channel Realization Index = %d **************************\n", ch_realization);
      saving_bler=1;
    }
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    //    if ((subframe>5) || (subframe < 4))
    //      PHY_vars_UE->frame++;
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    for (SNR=snr0; SNR<snr1; SNR+=input_snr_step) {
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      errs[0]=0;
      errs[1]=0;
      errs[2]=0;
      errs[3]=0;
      round_trials[0] = 0;
      round_trials[1] = 0;
      round_trials[2] = 0;
      round_trials[3] = 0;
      cqi_errors=0;
      ack_errors=0;
      cqi_crc_falsepositives=0;
      cqi_crc_falsenegatives=0;
      round=0;
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      //randominit(0);

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      harq_pid = subframe2harq_pid(&PHY_vars_UE->lte_frame_parms,PHY_vars_UE->frame_tx,subframe);
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      input_buffer_length = PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->TBS/8;
      input_buffer = (unsigned char *)malloc(input_buffer_length+4);
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      //      printf("UL frame %d/subframe %d, harq_pid %d\n",PHY_vars_UE->frame,subframe,harq_pid);
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      if (input_fdUL == NULL) {
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        if (n_frames == 1) {
          trch_out_fdUL= fopen("ulsch_trchUL.txt","w");

          for (i=0; i<input_buffer_length; i++) {
            input_buffer[i] = taus()&0xff;

            for (j=0; j<8; j++)
              fprintf(trch_out_fdUL,"%d\n",(input_buffer[i]>>(7-j))&1);
          }

          fclose(trch_out_fdUL);
        } else {
          for (i=0; i<input_buffer_length; i++)
            input_buffer[i] = taus()&0xff;
        }
      } else {
        n_frames=1;
        i=0;

        while (!feof(input_fdUL)) {
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          ret=fscanf(input_fdUL,"%s %s",input_val_str,input_val_str2);//&input_val1,&input_val2);
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          if ((i%4)==0) {
            ((short*)txdata[0])[i/2] = (short)((1<<15)*strtod(input_val_str,NULL));
            ((short*)txdata[0])[(i/2)+1] = (short)((1<<15)*strtod(input_val_str2,NULL));

            if ((i/4)<100)
              printf("sample %d => %e + j%e (%d +j%d)\n",i/4,strtod(input_val_str,NULL),strtod(input_val_str2,NULL),((short*)txdata[0])[i/4],((short*)txdata[0])[(i/4)+1]);//1,input_val2,);
          }

          i++;

          if (i>(FRAME_LENGTH_SAMPLES))
            break;
        }

        printf("Read in %d samples\n",i/4);
        //      write_output("txsig0UL.m","txs0", txdata[0],2*frame_parms->samples_per_tti,1,1);
        //    write_output("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
        tx_lev = signal_energy(&txdata[0][0],
                               OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
        tx_lev_dB = (unsigned int) dB_fixed(tx_lev);

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      }

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      avg_iter = 0;
      iter_trials=0;
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      reset_meas(&PHY_vars_UE->phy_proc_tx);
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      reset_meas(&PHY_vars_UE->ofdm_mod_stats);
      reset_meas(&PHY_vars_UE->ulsch_modulation_stats);
      reset_meas(&PHY_vars_UE->ulsch_encoding_stats);
      reset_meas(&PHY_vars_UE->ulsch_interleaving_stats);
      reset_meas(&PHY_vars_UE->ulsch_rate_matching_stats);
      reset_meas(&PHY_vars_UE->ulsch_turbo_encoding_stats);
      reset_meas(&PHY_vars_UE->ulsch_segmentation_stats);
      reset_meas(&PHY_vars_UE->ulsch_multiplexing_stats);
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      reset_meas(&PHY_vars_eNB->phy_proc_rx);
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      reset_meas(&PHY_vars_eNB->ofdm_demod_stats);
      reset_meas(&PHY_vars_eNB->ulsch_channel_estimation_stats);
      reset_meas(&PHY_vars_eNB->ulsch_freq_offset_estimation_stats);
      reset_meas(&PHY_vars_eNB->rx_dft_stats);
      reset_meas(&PHY_vars_eNB->ulsch_decoding_stats);
      reset_meas(&PHY_vars_eNB->ulsch_turbo_decoding_stats);
      reset_meas(&PHY_vars_eNB->ulsch_deinterleaving_stats);
      reset_meas(&PHY_vars_eNB->ulsch_demultiplexing_stats);
      reset_meas(&PHY_vars_eNB->ulsch_rate_unmatching_stats);
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      reset_meas(&PHY_vars_eNB->ulsch_tc_init_stats);
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      reset_meas(&PHY_vars_eNB->ulsch_tc_alpha_stats);
      reset_meas(&PHY_vars_eNB->ulsch_tc_beta_stats);
      reset_meas(&PHY_vars_eNB->ulsch_tc_gamma_stats);
      reset_meas(&PHY_vars_eNB->ulsch_tc_ext_stats);
      reset_meas(&PHY_vars_eNB->ulsch_tc_intl1_stats);
      reset_meas(&PHY_vars_eNB->ulsch_tc_intl2_stats);

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      // initialization
      struct list time_vector_tx;
      initialize(&time_vector_tx);
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      struct list time_vector_tx_ifft;
      initialize(&time_vector_tx_ifft);
      struct list time_vector_tx_mod;
      initialize(&time_vector_tx_mod);
      struct list time_vector_tx_enc;
      initialize(&time_vector_tx_enc);

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      struct list time_vector_rx;
      initialize(&time_vector_rx);
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      struct list time_vector_rx_fft;
      initialize(&time_vector_rx_fft);
      struct list time_vector_rx_demod;
      initialize(&time_vector_rx_demod);
      struct list time_vector_rx_dec;
      initialize(&time_vector_rx_dec);
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      for (trials = 0; trials<n_frames; trials++) {
        //      printf("*");
        //        PHY_vars_UE->frame++;
        //        PHY_vars_eNB->frame++;

        fflush(stdout);
        round=0;

        while (round < 4) {
          PHY_vars_eNB->ulsch_eNB[0]->harq_processes[harq_pid]->round=round;
          PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->round=round;
          //  printf("Trial %d : Round %d ",trials,round);
          round_trials[round]++;

          if (round == 0) {
            //PHY_vars_eNB->ulsch_eNB[0]->harq_processes[harq_pid]->Ndi = 1;
            PHY_vars_eNB->ulsch_eNB[0]->harq_processes[harq_pid]->rvidx = round>>1;
            //PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->Ndi = 1;
            PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->rvidx = round>>1;
          } else {
            //PHY_vars_eNB->ulsch_eNB[0]->harq_processes[harq_pid]->Ndi = 0;
            PHY_vars_eNB->ulsch_eNB[0]->harq_processes[harq_pid]->rvidx = round>>1;
            //PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->Ndi = 0;
            PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->rvidx = round>>1;
          }


          /////////////////////
          if (abstx) {
            if (trials==0 && round==0 && SNR==snr0) { //generate a new channel
              hold_channel = 0;
              flagMag=0;
            } else {
              hold_channel = 1;
              flagMag = 1;
            }
          } else {
            hold_channel = 0;
            flagMag=1;
          }

          ///////////////////////////////////////

          if (input_fdUL == NULL) {

            start_meas(&PHY_vars_UE->phy_proc_tx);
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#ifdef OFDMA_ULSCH
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            if (srs_flag)
              generate_srs_tx(PHY_vars_UE,0,AMP,subframe);

            generate_drs_pusch(PHY_vars_UE,0,AMP,subframe,first_rb,nb_rb,0);

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#else
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            if (srs_flag)
              generate_srs_tx(PHY_vars_UE,0,AMP,subframe);

            generate_drs_pusch(PHY_vars_UE,0,
                               AMP,subframe,
                               PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->first_rb,
                               PHY_vars_UE->ulsch_ue[0]->harq_processes[harq_pid]->nb_rb,
                               0);
#endif

            if ((cqi_flag == 1) && (n_frames == 1) ) {
              printf("CQI information (O %d) %d %d\n",PHY_vars_UE->ulsch_ue[0]->O,
                     PHY_vars_UE->ulsch_ue[0]->o[0],PHY_vars_UE->ulsch_ue[0]->o[1]);
              print_CQI(PHY_vars_UE->ulsch_ue[0]->o,PHY_vars_UE->ulsch_ue[0]->uci_format,PHY_vars_UE->lte_frame_parms.N_RB_DL,0);
            }

            PHY_vars_UE->ulsch_ue[0]->o_ACK[0] = taus()&1;

            start_meas(&PHY_vars_UE->ulsch_encoding_stats);

            if (ulsch_encoding(input_buffer,
                               PHY_vars_UE,
                               harq_pid,
                               eNB_id,
                               2, // transmission mode
                               control_only_flag,
                               1// Nbundled
                              )==-1) {
              printf("ulsim.c Problem with ulsch_encoding\n");
              exit(-1);
            }

            stop_meas(&PHY_vars_UE->ulsch_encoding_stats);

            start_meas(&PHY_vars_UE->ulsch_modulation_stats);
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#ifdef OFDMA_ULSCH
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            ulsch_modulation(PHY_vars_UE->lte_ue_common_vars.txdataF,AMP,
                             PHY_vars_UE->frame_tx,subframe,&PHY_vars_UE->lte_frame_parms,PHY_vars_UE->ulsch_ue[0]);
#else
            //    printf("Generating PUSCH in subframe %d with amp %d, nb_rb %d\n",subframe,AMP,nb_rb);
            ulsch_modulation(PHY_vars_UE->lte_ue_common_vars.txdataF,AMP,
                             PHY_vars_UE->frame_tx,subframe,&PHY_vars_UE->lte_frame_parms,
                             PHY_vars_UE->ulsch_ue[0]);
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#endif
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            stop_meas(&PHY_vars_UE->ulsch_modulation_stats);

            if (n_frames==1) {
              write_output("txsigF0UL.m","txsF0", &PHY_vars_UE->lte_ue_common_vars.txdataF[0][PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size*nsymb*subframe],PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size*nsymb,1,
                           1);
              //write_output("txsigF1.m","txsF1", PHY_vars_UE->lte_ue_common_vars.txdataF[0],FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
            }

            tx_lev=0;
            start_meas(&PHY_vars_UE->ofdm_mod_stats);

            for (aa=0; aa<1; aa++) {
              if (frame_parms->Ncp == 1)
                PHY_ofdm_mod(&PHY_vars_UE->lte_ue_common_vars.txdataF[aa][subframe*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES_NO_PREFIX],        // input
                             &txdata[aa][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe],         // output
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                             PHY_vars_UE->lte_frame_parms.ofdm_symbol_size,
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                             nsymb,                 // number of symbols
                             PHY_vars_UE->lte_frame_parms.nb_prefix_samples,               // number of prefix samples
                             CYCLIC_PREFIX);
              else
                normal_prefix_mod(&PHY_vars_UE->lte_ue_common_vars.txdataF[aa][subframe*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES_NO_PREFIX],
                                  &txdata[aa][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe],
                                  nsymb,
                                  frame_parms);

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#ifndef OFDMA_ULSCH
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              apply_7_5_kHz(PHY_vars_UE,PHY_vars_UE->lte_ue_common_vars.txdata[aa],subframe<<1);
              apply_7_5_kHz(PHY_vars_UE,PHY_vars_UE->lte_ue_common_vars.txdata[aa],1+(subframe<<1));
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#endif
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              stop_meas(&PHY_vars_UE->ofdm_mod_stats);
              stop_meas(&PHY_vars_UE->phy_proc_tx);
              tx_lev += signal_energy(&txdata[aa][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe],
                                      PHY_vars_eNB->lte_frame_parms.samples_per_tti);

            }
          }  // input_fd == NULL


          tx_lev_dB = (unsigned int) dB_fixed_times10(tx_lev);

          if (n_frames==1) {
            write_output("txsig0UL.m","txs0", &txdata[0][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe],2*frame_parms->samples_per_tti,1,1);
            //        write_output("txsig1UL.m","txs1", &txdata[1][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe],2*frame_parms->samples_per_tti,1,1);
          }

          //AWGN
          //Set target wideband RX noise level to N0
          sigma2_dB = N0;//10*log10((double)tx_lev)  +10*log10(PHY_vars_UE->lte_frame_parms.ofdm_symbol_size/(PHY_vars_UE->lte_frame_parms.N_RB_DL*12)) - SNR;
          sigma2 = pow(10,sigma2_dB/10);

          // compute tx_gain to achieve target SNR (per resource element!)
          tx_gain = sqrt(pow(10.0,.1*(N0+SNR))*(nb_rb*12/(double)PHY_vars_UE->lte_frame_parms.ofdm_symbol_size)/(double)tx_lev);

          if (n_frames==1)
            printf("tx_lev = %d (%d.%d dB,%f), gain %f\n",tx_lev,tx_lev_dB/10,tx_lev_dB,10*log10((double)tx_lev),10*log10(tx_gain));


          // fill measurement symbol (19) with noise
          for (i=0; i<OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
            for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_rx; aa++) {

              ((short*) &PHY_vars_eNB->lte_eNB_common_vars.rxdata[0][aa][(frame_parms->samples_per_tti<<1) -frame_parms->ofdm_symbol_size])[2*i] = (short) ((sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
              ((short*) &PHY_vars_eNB->lte_eNB_common_vars.rxdata[0][aa][(frame_parms->samples_per_tti<<1) -frame_parms->ofdm_symbol_size])[2*i+1] = (short) ((sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
            }
          }

          // multipath channel

          for (i=0; i<PHY_vars_eNB->lte_frame_parms.samples_per_tti; i++) {
            for (aa=0; aa<1; aa++) {
              s_re[aa][i] = ((double)(((short *)&txdata[aa][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe]))[(i<<1)]);
              s_im[aa][i] = ((double)(((short *)&txdata[aa][PHY_vars_eNB->lte_frame_parms.samples_per_tti*subframe]))[(i<<1)+1]);
            }
          }

          if (awgn_flag == 0) {
            if (UE2eNB->max_Doppler == 0) {
              multipath_channel(UE2eNB,s_re,s_im,r_re,r_im,
                                PHY_vars_eNB->lte_frame_parms.samples_per_tti,hold_channel);
            } else {
              multipath_tv_channel(UE2eNB,s_re,s_im,r_re,r_im,
                                   2*PHY_vars_eNB->lte_frame_parms.samples_per_tti,hold_channel);
            }
          }

          if(abstx) {
            if(saving_bler==0)
              if (trials==0 && round==0) {
                // calculate freq domain representation to compute SINR
                freq_channel(UE2eNB, N_RB_DL,12*N_RB_DL + 1);

                // snr=pow(10.0,.1*SNR);
                fprintf(csv_fdUL,"%f,%d,%d,%f,%f,%f,",SNR,tx_lev,tx_lev_dB,sigma2_dB,tx_gain,SNR2);

                //fprintf(csv_fdUL,"%f,",SNR);
                for (u=0; u<12*nb_rb; u++) {
                  for (aarx=0; aarx<UE2eNB->nb_rx; aarx++) {
                    for (aatx=0; aatx<UE2eNB->nb_tx; aatx++) {
                      // abs_channel = (eNB2UE->chF[aarx+(aatx*eNB2UE->nb_rx)][u].x*eNB2UE->chF[aarx+(aatx*eNB2UE->nb_rx)][u].x + eNB2UE->chF[aarx+(aatx*eNB2UE->nb_rx)][u].y*eNB2UE->chF[aarx+(aatx*eNB2UE->nb_rx)][u].y);
                      channelx = UE2eNB->chF[aarx+(aatx*UE2eNB->nb_rx)][u].x;
                      channely = UE2eNB->chF[aarx+(aatx*UE2eNB->nb_rx)][u].y;
                      // if(transmission_mode==5){
                      fprintf(csv_fdUL,"%e+i*(%e),",channelx,channely);
                      // }
                      // else{
                      //  pilot_sinr = 10*log10(snr*abs_channel);
                      //  fprintf(csv_fd,"%e,",pilot_sinr);
                      // }
                    }
                  }
                }
              }
          }

          if (n_frames==1)
            printf("Sigma2 %f (sigma2_dB %f), tx_gain %f (%f dB)\n",sigma2,sigma2_dB,tx_gain,20*log10(tx_gain));

          for (i