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Commit d62b7a1e authored by Thomas Schlichter's avatar Thomas Schlichter
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gNB: fix corruption of RBs not used by PDSCH in nr_generate_pdsch() 

A memcpy() introduced to optimize for the case of no precoding corrupted RBs which are not allocated to PDSCH in the common txdataF array.
So instead fall back to memcpy() for each PDSCH RB.
parent f0c46b45
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openair1/PHY/NR_TRANSPORT/nr_dlsch.c
View file @ d62b7a1e
......@@ -412,98 +412,85 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB,
///Layer Precoding and Antenna port mapping
// tx_layers 1-8 are mapped on antenna ports 1000-1007
// The precoding info is supported by nfapi such as numPRGs, prg_size, and pm_idx
// The precoding info is supported by nfapi such as num_prgs, prg_size, prgs_list and pm_idx
// The same precoding matrix is applied on prg_size RBs, Thus
// pmi = pm_idx[rbidx/prg_size], rbidx =0,...,rbSize-1
// pmi = prgs_list[rbidx/prg_size].pm_idx, rbidx =0,...,rbSize-1
// The Precoding matrix:
// The Codebook Type I and Type II are not supported yet.
// We adopt the precoding matrices of PUSCH for 4 layers.
if ((frame_parms->nb_antennas_tx == 1 && rel15->nrOfLayers == 1) || rel15->precodingAndBeamforming.prg_size == 0) {//No precoding if precoding info is not available
for (int ap=0; ap<frame_parms->nb_antennas_tx; ap++) {//frame_parms->nb_antennas_tx rel15->nrOfLayers
if(ap<rel15->nrOfLayers)
memcpy((void*)&txdataF[ap][rel15->StartSymbolIndex*frame_parms->ofdm_symbol_size + txdataF_offset],
(void*)&txdataF_precoding[ap][2*(rel15->StartSymbolIndex*frame_parms->ofdm_symbol_size + txdataF_offset)],
rel15->NrOfSymbols*frame_parms->ofdm_symbol_size*sizeof(int32_t));
else
memset((void*)&txdataF[ap][rel15->StartSymbolIndex*frame_parms->ofdm_symbol_size + txdataF_offset],
0,
rel15->NrOfSymbols*frame_parms->ofdm_symbol_size*sizeof(int32_t));
}
} else {//apply precoding
uint8_t pmi;
for (int ap=0; ap<frame_parms->nb_antennas_tx; ap++) {
for (int ap=0; ap<frame_parms->nb_antennas_tx; ap++) {
for (int l=rel15->StartSymbolIndex; l<rel15->StartSymbolIndex+rel15->NrOfSymbols; l++) {
uint16_t k = start_sc;
for (int l=rel15->StartSymbolIndex; l<rel15->StartSymbolIndex+rel15->NrOfSymbols; l++) {
uint16_t k = start_sc;
for (int rb=0; rb<rel15->rbSize; rb++) {
//get pmi info
if (rel15->precodingAndBeamforming.prg_size > 0)
pmi = rel15->precodingAndBeamforming.prgs_list[(int)rb/rel15->precodingAndBeamforming.prg_size].pm_idx;
else
pmi = 0;//no precoding
for (int rb=0; rb<rel15->rbSize; rb++) {
//get pmi info
uint8_t pmi;
if (rel15->precodingAndBeamforming.prg_size > 0)
pmi = rel15->precodingAndBeamforming.prgs_list[(int)rb/rel15->precodingAndBeamforming.prg_size].pm_idx;
else
pmi = 0;//no precoding
if (pmi == 0) {//unitary Precoding
if(ap<rel15->nrOfLayers)
memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + txdataF_offset + k],
(void*)&txdataF_precoding[ap][2*(l*frame_parms->ofdm_symbol_size + txdataF_offset+ k)],
NR_NB_SC_PER_RB*sizeof(int32_t));
else
memset((void*)&txdataF[ap][rel15->StartSymbolIndex*frame_parms->ofdm_symbol_size + txdataF_offset +k],
0,
NR_NB_SC_PER_RB*sizeof(int32_t));
k += NR_NB_SC_PER_RB;
if (k >= frame_parms->ofdm_symbol_size) {
k -= frame_parms->ofdm_symbol_size;
}
}
else {
//get the precoding matrix weights:
char *W_prec;
switch (frame_parms->nb_antennas_tx) {
case 1://1 antenna port
W_prec = nr_W_1l_2p[pmi][ap];
break;
case 2://2 antenna ports
if (rel15->nrOfLayers == 1)//1 layer
W_prec = nr_W_1l_2p[pmi][ap];
else//2 layers
W_prec = nr_W_2l_2p[pmi][ap];
break;
case 4://4 antenna ports
if (rel15->nrOfLayers == 1)//1 layer
W_prec = nr_W_1l_4p[pmi][ap];
else if (rel15->nrOfLayers == 2)//2 layers
W_prec = nr_W_2l_4p[pmi][ap];
else if (rel15->nrOfLayers == 3)//3 layers
W_prec = nr_W_3l_4p[pmi][ap];
else//4 layers
W_prec = nr_W_4l_4p[pmi][ap];
break;
default:
LOG_D(PHY,"Precoding 1,2, or 4 antenna ports are currently supported\n");
W_prec = nr_W_1l_2p[pmi][ap];
break;
}
if (pmi == 0) {//unitary Precoding
if(ap<rel15->nrOfLayers)
memcpy((void*)&txdataF[ap][l*frame_parms->ofdm_symbol_size + txdataF_offset + k],
(void*)&txdataF_precoding[ap][2*(l*frame_parms->ofdm_symbol_size + txdataF_offset+ k)],
NR_NB_SC_PER_RB*sizeof(int32_t));
else
memset((void*)&txdataF[ap][rel15->StartSymbolIndex*frame_parms->ofdm_symbol_size + txdataF_offset +k],
0,
NR_NB_SC_PER_RB*sizeof(int32_t));
k += NR_NB_SC_PER_RB;
if (k >= frame_parms->ofdm_symbol_size) {
k -= frame_parms->ofdm_symbol_size;
}
case 2://2 antenna ports
if (rel15->nrOfLayers == 1)//1 layer
W_prec = nr_W_1l_2p[pmi][ap];
else//2 layers
W_prec = nr_W_2l_2p[pmi][ap];
break;
case 4://4 antenna ports
if (rel15->nrOfLayers == 1)//1 layer
W_prec = nr_W_1l_4p[pmi][ap];
else if (rel15->nrOfLayers == 2)//2 layers
W_prec = nr_W_2l_4p[pmi][ap];
else if (rel15->nrOfLayers == 3)//3 layers
W_prec = nr_W_3l_4p[pmi][ap];
else//4 layers
W_prec = nr_W_4l_4p[pmi][ap];
break;
default:
LOG_D(PHY,"Precoding 1,2, or 4 antenna ports are currently supported\n");
W_prec = nr_W_1l_2p[pmi][ap];
break;
}
else {
for (int i=0; i<NR_NB_SC_PER_RB; i++) {
int32_t re_offset = l*frame_parms->ofdm_symbol_size + k;
int32_t precodatatx_F = nr_layer_precoder(txdataF_precoding, W_prec, rel15->nrOfLayers, re_offset+txdataF_offset);
((int16_t*)txdataF[ap])[(re_offset<<1) + (2*txdataF_offset)] = ((int16_t *) &precodatatx_F)[0];
((int16_t*)txdataF[ap])[(re_offset<<1) + 1 + (2*txdataF_offset)] = ((int16_t *) &precodatatx_F)[1];
for (int i=0; i<NR_NB_SC_PER_RB; i++) {
int32_t re_offset = l*frame_parms->ofdm_symbol_size + k;
int32_t precodatatx_F = nr_layer_precoder(txdataF_precoding, W_prec, rel15->nrOfLayers, re_offset+txdataF_offset);
((int16_t*)txdataF[ap])[(re_offset<<1) + (2*txdataF_offset)] = ((int16_t *) &precodatatx_F)[0];
((int16_t*)txdataF[ap])[(re_offset<<1) + 1 + (2*txdataF_offset)] = ((int16_t *) &precodatatx_F)[1];
#ifdef DEBUG_DLSCH_MAPPING
printf("antenna %d\t l %d \t k %d \t txdataF: %d %d\n",
ap, l, k, ((int16_t*)txdataF[ap])[(re_offset<<1) + (2*txdataF_offset)],
((int16_t*)txdataF[ap])[(re_offset<<1) + 1 + (2*txdataF_offset)]);
printf("antenna %d\t l %d \t k %d \t txdataF: %d %d\n",
ap, l, k, ((int16_t*)txdataF[ap])[(re_offset<<1) + (2*txdataF_offset)],
((int16_t*)txdataF[ap])[(re_offset<<1) + 1 + (2*txdataF_offset)]);
#endif
if (++k >= frame_parms->ofdm_symbol_size) {
k -= frame_parms->ofdm_symbol_size;
}
if (++k >= frame_parms->ofdm_symbol_size) {
k -= frame_parms->ofdm_symbol_size;
}
}
} //RB loop
} // symbol loop
}// port loop
}
}
} //RB loop
} // symbol loop
}// port loop
dlsch->slot_tx[slot]=0;
......
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