NR_UE: fix ulsch precoding for RB crossing DC (odd number of RB)

openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c

@@ -495,15 +495,34 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
         uint8_t pmi=pusch_pdu->Tpmi;
           
         if (pmi == 0) {//unitary Precoding
-          if(ap< pusch_pdu->nrOfLayers)
-            memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size  + k],
-                   (void*)&tx_precoding[ap][2*(l*frame_parms->ofdm_symbol_size + k)],
-                   NR_NB_SC_PER_RB*sizeof(int32_t));
-          else
-            memset((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + k],
-                   0,
-                   NR_NB_SC_PER_RB*sizeof(int32_t));
-
+          if (k + NR_NB_SC_PER_RB <= frame_parms->ofdm_symbol_size) { // RB does not cross DC
+            if (ap<pusch_pdu->nrOfLayers)
+              memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size  + k],
+                     (void*)&tx_precoding[ap][2*(l*frame_parms->ofdm_symbol_size + k)],
+                     NR_NB_SC_PER_RB*sizeof(int32_t));
+            else
+              memset((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + k],
+                     0,
+                     NR_NB_SC_PER_RB*sizeof(int32_t));
+          } else { // RB does cross DC
+            int neg_length = frame_parms->ofdm_symbol_size - k;
+            int pos_length = NR_NB_SC_PER_RB - neg_length;
+            if (ap<pusch_pdu->nrOfLayers) {
+              memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + k],
+                     (void*)&tx_precoding[ap][2*(l*frame_parms->ofdm_symbol_size + k)],
+                     neg_length*sizeof(int32_t));
+              memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size],
+                     (void*)&tx_precoding[ap][2*(l*frame_parms->ofdm_symbol_size)],
+                     pos_length*sizeof(int32_t));
+            } else {
+              memset((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + k],
+                     0,
+                     neg_length*sizeof(int32_t));
+              memset((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size],
+                     0,
+                     pos_length*sizeof(int32_t));
+            }
+          }
           k += NR_NB_SC_PER_RB;
           if (k >= frame_parms->ofdm_symbol_size) {
             k -= frame_parms->ofdm_symbol_size;