Commit fe191c7d authored by Thomas Schlichter's avatar Thomas Schlichter 🇩🇪
Browse files

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 c5546228
......@@ -418,19 +418,6 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB,
// 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.prgSize == 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 l=rel15->StartSymbolIndex; l<rel15->StartSymbolIndex+rel15->NrOfSymbols; l++) {
......@@ -438,11 +425,27 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB,
for (int rb=0; rb<rel15->rbSize; rb++) {
//get pmi info
uint8_t pmi;
if (rel15->precodingAndBeamforming.prgSize > 0)
pmi = rel15->precodingAndBeamforming.PMIdx[(int)rb/rel15->precodingAndBeamforming.prgSize];
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) {
......@@ -470,21 +473,6 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB,
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;
}
}
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);
......@@ -503,7 +491,6 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB,
} //RB loop
} // symbol loop
}// port loop
}
dlsch->slot_tx[slot]=0;
}// dlsch loop
......
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