Removed Phase compensation/nr_rotation in DL/UL if IF4P5 mode is used with single antenna

Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.com>

executables/nr-gnb.c

@@ -227,6 +227,8 @@ void rx_func(void *param) {
     // Do PRACH RU processing
     L1_nr_prach_procedures(gNB,frame_rx,slot_rx);
 
+    //WA: comment rotation in tx/rx
+    if((gNB->num_RU == 1) && (gNB->RU_list[0]->if_south != REMOTE_IF4p5)) {
       //apply the rx signal rotation here
       for (int aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++) {
         apply_nr_rotation_ul(&gNB->frame_parms,
@@ -235,6 +237,7 @@ void rx_func(void *param) {
             0,
             gNB->frame_parms.Ncp==EXTENDED?12:14);
       }
+    }
     phy_procedures_gNB_uespec_RX(gNB, frame_rx, slot_rx);
   }
 

openair1/SCHED_NR/phy_procedures_nr_gNB.c

@@ -196,7 +196,9 @@ void phy_procedures_gNB_TX(processingData_L1tx_t *msgTx,
 
 //  if ((frame&127) == 0) dump_pdsch_stats(gNB);
 
-  //apply the OFDM symbol rotation here
+//apply the OFDM symbol rotation here
+// WA: Comment rotation in tx/rx
+  if((gNB->num_RU == 1) && (gNB->RU_list[0]->if_south != REMOTE_IF4p5)) {
     for (aa=0; aa<cfg->carrier_config.num_tx_ant.value; aa++) {
       apply_nr_rotation(fp,(int16_t*) &gNB->common_vars.txdataF[aa][txdataF_offset],slot,0,fp->Ncp==EXTENDED?12:14);
 
@@ -204,7 +206,7 @@ void phy_procedures_gNB_TX(processingData_L1tx_t *msgTx,
           T_INT(frame), T_INT(slot),
           T_INT(aa), T_BUFFER(&gNB->common_vars.txdataF[aa][txdataF_offset], fp->samples_per_slot_wCP*sizeof(int32_t)));
     }
-
+  }
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_gNB_TX+offset,0);
 }