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dft-based pucch0 receiver

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This commit is contained in:
Raymond Knopp
2020-04-01 16:52:56 +02:00
parent 0a2e033253
commit 72d76c7585
4 changed files with 98 additions and 26 deletions
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openair1/SIMULATION/NR_PHY/pucchsim.c
+22 -8
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@@ -454,8 +454,6 @@ int main(int argc, char **argv)
for(SNR=snr0;SNR<=snr1;SNR=SNR+1){
ack_nack_errors=0;
n_errors = 0;
sigma2_dB = 20*log10((double)amp/32767)-SNR;
sigma2 = pow(10,sigma2_dB/10);
for (trial=0; trial<n_trials; trial++) {
bzero(txdata[0],frame_length_complex_samples*sizeof(int));
if(format==0){
@@ -464,7 +462,11 @@ int main(int argc, char **argv)
else{
nr_generate_pucch1(UE,txdata,frame_parms,UE->pucch_config_dedicated,actual_payload,amp,nr_tti_tx,m0,nrofSymbols,startingSymbolIndex,startingPRB,startingPRB_intraSlotHopping,0,nr_bit);
}
for(i=0; i<frame_length_complex_samples; i++) {
int tx_lev=signal_energy(
sigma2_dB = 20*log10((double)amp/32767)-SNR;
sigma2 = pow(10,sigma2_dB/10);
for(i=(nr_tti_tx*frame_parms->samples_per_slot; i<(nr_tti_tx+1)*frame_parms->samples_per_slot; i++) {
r_re[aa][i]=((double)(((int16_t *)txdata[0])[(i<<1)])/32767 + sqrt(sigma2/2)*gaussdouble(0.0,1.0));
r_im[aa][i]=((double)(((int16_t *)txdata[0])[(i<<1)+1])/32767+ sqrt(sigma2/2)*gaussdouble(0.0,1.0));
r_re[aa][i]=r_re[0][i]/(sqrt(sigma2/2)+1);
@@ -481,13 +483,26 @@ int main(int argc, char **argv)
((int16_t *)txdata[aa])[(i<<1)+1] =(int16_t)round(r_im[aa][i]*32767);
}
if(format==0){
nr_decode_pucch0(txdata,PUCCH_GroupHopping,n_id,&(payload_received),frame_parms,amp,nr_tti_tx,m0,nrofSymbols,startingSymbolIndex,startingPRB,nr_bit);
nfapi_nr_uci_pucch_pdu_format_0_1_t uci_pdu;
nfapi_nr_pucch_pdu_t pucch_pdu;
pucch_pdu.group_hop_flag = PUCCH_GroupHopping&1;
pucch_pdu.sequence_hop_flag = (PUCCH_GroupHopping>>1)&1;
pucch_pdu.bit_len_harq = nr_bit;
pucch_pdu.sr_flag = 0;
pucch_pdu.nr_of_symbols = nrofSymbols;
pucch_pdu.hopping_id = n_id;
pucch_pdu.initial_cyclic_shift = 0;
pucch_pdu.start_symbol_index = startingSymbolIndex;
pucch_pdu.prb_start = startingPRB;
nr_decode_pucch0(txdata,frame_parms,nr_tti_tx,&uci_pdu,&pucch_pdu);
if(nr_bit==1)
ack_nack_errors+=(((actual_payload^payload_received)&2)>>1);
ack_nack_errors+=(actual_payload^uci_pdu.harq->harq_list[0].harq_value);
else
ack_nack_errors+=(((actual_payload^payload_received)&2)>>1) + (((actual_payload^payload_received)&4)>>2);
ack_nack_errors+=((actual_payload^uci_pdu.harq->harq_list[0].harq_value)+((actual_payload>>1)^uci_pdu.harq->harq_list[1].harq_value));
free(uci_pdu.harq->harq_list);
}
else{
nr_decode_pucch1(txdata,PUCCH_GroupHopping,n_id,&(payload_received),frame_parms,amp,nr_tti_tx,m0,nrofSymbols,startingSymbolIndex,startingPRB,startingPRB_intraSlotHopping,timeDomainOCC,nr_bit);
if(nr_bit==1)
ack_nack_errors+=((actual_payload^payload_received)&1);
@@ -496,8 +511,7 @@ int main(int argc, char **argv)
}
n_errors=((actual_payload^payload_received)&1)+(((actual_payload^payload_received)&2)>>1)+(((actual_payload^payload_received)&4)>>2)+n_errors;
}
printf("Decoded payload is %ld\n",payload_received);
printf("SNR=%f, n_trials=%d, n_bit_errors=%d\n",SNR,n_trials,n_errors);
printf("SNR=%f, n_trials=%d, n_bit_errors=%d\n",SNR,n_trials,ack_nack_errors);
if((float)ack_nack_errors/(float)(nr_bit*n_trials)<=target_error_rate){
printf("PUCCH test OK\n");
break;