UE: N_TA_offset configuration depending on SCS and N_RB_DL

executables/nr-uesoftmodem.c

@@ -759,16 +759,50 @@ int main( int argc, char **argv ) {
     UE[CC_id]->rx_total_gain_dB =  (int)rx_gain[CC_id][0] + rx_gain_off;
     UE[CC_id]->tx_power_max_dBm = tx_max_power[CC_id];
 
-    if (frame_parms[CC_id]->frame_type==FDD) {
+    if (UE[CC_id]->frame_parms.frame_type == FDD) {
       UE[CC_id]->N_TA_offset = 0;
     } else {
-      if (frame_parms[CC_id]->N_RB_DL == 100)
+      int N_RB = UE[CC_id]->frame_parms.N_RB_DL;
+      int N_TA_offset = UE[CC_id]->frame_parms.ul_CarrierFreq < 6e9 ? 400 : 431; // reference samples  for 25600Tc @ 30.72 Ms/s for FR1, same @ 61.44 Ms/s for FR2
+      double factor=1;
+      switch (UE[CC_id]->frame_parms.numerology_index) {
+        case 0: //15 kHz scs
+          AssertFatal(N_TA_offset == 400, "scs_common 15kHz only for FR1\n");
+          if (N_RB <= 25) factor = .25;      // 7.68 Ms/s
+          else if (N_RB <=50) factor = .5;   // 15.36 Ms/s
+          else if (N_RB <=75) factor = 1.0;  // 30.72 Ms/s
+          else if (N_RB <=100) factor = 1.0; // 30.72 Ms/s
+          else AssertFatal(1==0,"Too many PRBS for mu=0\n");
+          break;
+        case 1: //30 kHz sc
+          AssertFatal(N_TA_offset == 400, "scs_common 30kHz only for FR1\n");
+          if (N_RB <= 106) factor = 2.0; // 61.44 Ms/s
+          else if (N_RB <= 275) factor = 4.0; // 122.88 Ms/s
+          break;
+        case 2: //60 kHz scs
+          AssertFatal(1==0,"scs_common should not be 60 kHz\n");
+          break;
+        case 3: //120 kHz scs
+          AssertFatal(N_TA_offset == 431, "scs_common 120kHz only for FR2\n");
+          break;
+        case 4: //240 kHz scs
+          AssertFatal(1==0,"scs_common should not be 60 kHz\n");
+          if (N_RB <= 32) factor = 1.0; // 61.44 Ms/s
+          else if (N_RB <= 66) factor = 2.0; // 122.88 Ms/s
+          else AssertFatal(1==0,"N_RB %d is too big for curretn FR2 implementation\n",N_RB);
+          break;
+
+        if (N_RB == 100)
           UE[CC_id]->N_TA_offset = 624;
-      else if (frame_parms[CC_id]->N_RB_DL == 50)
+        else if (N_RB == 50)
           UE[CC_id]->N_TA_offset = 624/2;
-      else if (frame_parms[CC_id]->N_RB_DL == 25)
+        else if (N_RB == 25)
           UE[CC_id]->N_TA_offset = 624/4;
       }
+      if (UE[CC_id]->frame_parms.threequarter_fs == 1) factor = factor*.75;
+      UE[CC_id]->N_TA_offset = (int)(N_TA_offset * factor);
+      LOG_I(PHY,"UE %d Setting N_TA_offset to %d samples (factor %f, UL Freq %d, N_RB %d)\n", UE[CC_id]->Mod_id, UE[CC_id]->N_TA_offset, factor, UE[CC_id]->frame_parms.ul_CarrierFreq, N_RB);
+    }
   }
 
   //  printf("tx_max_power = %d -> amp %d\n",tx_max_power[0],get_tx_amp(tx_max_poHwer,tx_max_power));