Reverse bits in UCI message when using polar encoder/decoder

openair1/PHY/NR_TRANSPORT/pucch_rx.c

@@ -1693,12 +1693,16 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
     // run polar decoder on llrs
     decoderState = polar_decoder_int16((int16_t *)llrs, decodedPayload, 0, NR_POLAR_UCI_PUCCH_MESSAGE_TYPE, nb_bit, pucch_pdu->prb_size);
 
-    LOG_D(PHY,"UCI decoderState %d, payload[0] %llu\n",decoderState,(unsigned long long)decodedPayload[0]);
+    // Decoder reversal
+    decodedPayload[0] = reverse_bits(decodedPayload[0], nb_bit);
+
     if (decoderState>0) decoderState=1;
     corr_dB = dB_fixed64(corr);
     LOG_D(PHY,"metric %d dB\n",corr_dB);
   }
 
+  LOG_D(PHY, "UCI decoderState %d, payload[0] %llu\n", decoderState, (unsigned long long)decodedPayload[0]);
+
   // estimate CQI for MAC (from antenna port 0 only)
   // TODO this computation is wrong -> to be ignored at MAC for now
   int SNRtimes10 = dB_fixed_times10(signal_energy_nodc((int32_t *)&rxdataF[0][soffset+(l2*frame_parms->ofdm_symbol_size)+re_offset[0]],
@@ -1761,7 +1765,7 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
     }
     bit_left = pucch_pdu->bit_len_csi_part1-((csi_part1_bytes-1)<<3);
     uci_pdu->csi_part1.csi_part1_payload[i] = decodedPayload[0] & ((1<<bit_left)-1);
-    decodedPayload[0] = pucch_pdu->bit_len_csi_part1 < 64 ? decodedPayload[0] >> pucch_pdu->bit_len_csi_part1 : 0;
+    decodedPayload[0] = pucch_pdu->bit_len_csi_part1 < 64 ? decodedPayload[0] >> bit_left : 0;
   }
   
   if (pucch_pdu->bit_len_csi_part2>0) {

openair1/PHY/NR_UE_TRANSPORT/pucch_nr.c

@@ -644,7 +644,9 @@ static void nr_uci_encoding(uint64_t payload,
     b[7] = b[0];
     AssertFatal(nrofPRB<=16,"Number of PRB >16\n");
   } else if (A>=12) {
-    AssertFatal(A<65,"Polar encoding not supported yet for UCI with more than 64 bits\n");
+    // Encoder reversal
+    payload = reverse_bits(payload, A);
+
     polar_encoder_fast(&payload, b, 0,0,
                        NR_POLAR_UCI_PUCCH_MESSAGE_TYPE, 
                        A,