adding frequency offset to prachsim

openair1/SIMULATION/NR_PHY/prachsim.c

@@ -88,7 +88,7 @@ int main(int argc, char **argv){
   double **s_re, **s_im, **r_re, **r_im, iqim = 0.0, delay_avg = 0, ue_speed = 0, fs, bw;
   int i, aa, aarx, **txdata, trial, n_frames = 1, prach_start, rx_prach_start; //, ntrials=1;
   int N_RB_UL = 106, delay = 0, NCS_config = 13, rootSequenceIndex = 1, threequarter_fs = 0, mu = 1, fd_occasion = 0, loglvl = OAILOG_INFO, numRA = 0, prachStartSymbol = 0;
-  uint8_t snr1set = 0, ue_speed1set = 0, transmission_mode = 1, n_tx = 1, n_rx = 1, awgn_flag = 0, msg1_frequencystart = 0, num_prach_fd_occasions = 1, prach_format;
+  uint8_t snr1set = 0, ue_speed1set = 0, transmission_mode = 1, n_tx = 1, n_rx = 1, awgn_flag = 0, msg1_frequencystart = 0, num_prach_fd_occasions = 1, prach_format=0;
   uint8_t frame = 1, subframe = 9, slot=19, slot_gNB=19, config_index = 98, prach_sequence_length = 1, num_root_sequences = 16, restrictedSetConfig = 0, N_dur, N_t_slot, start_symbol;
   uint16_t Nid_cell = 0, preamble_tx = 0, preamble_delay, format, format0, format1;
   uint32_t tx_lev = 10000, prach_errors = 0, samp_count; //,tx_lev_dB;
@@ -131,6 +131,10 @@ int main(int argc, char **argv){
       config_index = atoi(optarg);
       break;
 
+    case 'r':
+      msg1_frequencystart = atoi(optarg);
+      break;
+
     case 'd':
       delay = atoi(optarg);
       break;
@@ -459,6 +463,8 @@ int main(int argc, char **argv){
     }
   }
 
+  printf("PRACH format %d\n",prach_format);
+      
   prach_config->num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index.value = rootSequenceIndex;
   prach_config->num_prach_fd_occasions_list[fd_occasion].k1.value                        = msg1_frequencystart;
   prach_config->restricted_set_config.value                                              = restrictedSetConfig;
@@ -578,16 +584,14 @@ int main(int argc, char **argv){
   /* tx_lev_dB not used later, no need to set */
   //tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
 
-  if (mu == 0)
-    samp_count = frame_parms->samples_per_subframe;
-  else
-    samp_count = ((slot)%(frame_parms->slots_per_subframe/2)) ? frame_parms->samples_per_slotN0 : frame_parms->samples_per_slot0;
+  samp_count=0;
+  for (int s=0; s<slot; s++) samp_count+=frame_parms->get_samples_per_slot(s,frame_parms);
   
-  prach_start = slot*samp_count - UE->N_TA_offset;
+  prach_start = samp_count - UE->N_TA_offset;
 
   #ifdef NR_PRACH_DEBUG
   LOG_M("txsig0.m", "txs0", &txdata[0][prach_start], frame_parms->samples_per_subframe, 1, 1);
-    //LOG_M("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
+    LOG_M("txsig0_frame.m","txs0", txdata[0],frame_parms->samples_per_frame,1,1);
   #endif
 
   // multipath channel
@@ -628,7 +632,7 @@ int main(int argc, char **argv){
       ue_speed1 = ue_speed0 + 50;
   }
 
-  rx_prach_start = slot*frame_parms->get_samples_per_slot(slot,frame_parms);
+  rx_prach_start = subframe*frame_parms->samples_per_subframe;
   if (n_frames==1) printf("slot %d, rx_prach_start %d\n",slot,rx_prach_start);
   uint16_t preamble_rx, preamble_energy, N_ZC;
   N_ZC = prach_sequence_length == 0 ? 839 : 139;
@@ -688,7 +692,7 @@ int main(int argc, char **argv){
         if (n_frames==1) {
           printf("preamble %d (tx %d) : energy %d, delay %d\n",preamble_rx,preamble_tx,preamble_energy,preamble_delay);
           #ifdef NR_PRACH_DEBUG
-            LOG_M("prach0.m","prach0", &txdata[0][prach_start], samp_count, 1, 1);
+	  LOG_M("prach0.m","prach0", &txdata[0][prach_start], frame_parms->samples_per_subframe, 1, 1);
             LOG_M("prachF0.m","prachF0", &gNB->prach_vars.prachF[0], N_ZC, 1, 1);
             LOG_M("rxsig0.m","rxs0", &gNB->common_vars.rxdata[0][rx_prach_start], frame_parms->samples_per_subframe, 1, 1);
             //LOG_M("ru_rxsig0.m","rxs0", &ru->common.rxdata[0][rx_prach_start], frame_parms->samples_per_subframe, 1, 1);