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Commit f8de6232 authored by Thomas Schlichter's avatar Thomas Schlichter
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NR_UE: use improved version of mult-layer dlsch_extract_rbs(), also correctly... 

NR_UE: use improved version of mult-layer dlsch_extract_rbs(), also correctly handling odd number of PRBs
parent 421eb65a
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Showing with 91 additions and 209 deletions
openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
View file @ f8de6232
......@@ -1599,7 +1599,7 @@ void nr_dlsch_channel_level_median(int **dl_ch_estimates_ext,
// Extraction functions
//==============================================================================================
unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
void nr_dlsch_extract_rbs(int **rxdataF,
int **dl_ch_estimates,
int **rxdataF_ext,
int **dl_ch_estimates_ext,
......@@ -1609,6 +1609,7 @@ unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
unsigned short start_rb,
unsigned short nb_rb_pdsch,
uint8_t n_dmrs_cdm_groups,
uint8_t Nl,
NR_DL_FRAME_PARMS *frame_parms,
uint16_t dlDmrsSymbPos,
int chest_time_type)
......@@ -1631,12 +1632,16 @@ unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
for (unsigned char aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
int32_t *dl_ch0 = &dl_ch_estimates[aarx][validDmrsEst * frame_parms->ofdm_symbol_size];
int32_t *dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol * nb_rb_pdsch * NR_NB_SC_PER_RB];
int32_t *rxF_ext = &rxdataF_ext[aarx][symbol * nb_rb_pdsch * NR_NB_SC_PER_RB];
int32_t *rxF = &rxdataF[aarx][symbol * frame_parms->ofdm_symbol_size];
for (unsigned char aatx = 0; aatx < Nl; aatx++) {
int32_t *dl_ch0 = &dl_ch_estimates[(aatx*frame_parms->nb_antennas_rx)+aarx][validDmrsEst * frame_parms->ofdm_symbol_size];
int32_t *dl_ch0_ext = &dl_ch_estimates_ext[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol * nb_rb_pdsch * NR_NB_SC_PER_RB];
if (pilots == 0) { //data symbol only
if (aatx == 0) {
if (start_re + nb_rb_pdsch * NR_NB_SC_PER_RB <= frame_parms->ofdm_symbol_size) {
memcpy((void*)rxF_ext, (void*)&rxF[start_re], nb_rb_pdsch * NR_NB_SC_PER_RB * sizeof(int32_t));
} else {
......@@ -1646,163 +1651,72 @@ unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
memcpy((void*)rxF_ext, (void*)&rxF[start_re], neg_length * sizeof(int32_t));
memcpy((void*)&rxF_ext[neg_length], (void*)rxF, pos_length * sizeof(int32_t));
}
}
memcpy((void*)dl_ch0_ext, (void*)dl_ch0, nb_rb_pdsch * NR_NB_SC_PER_RB * sizeof(int32_t));
}
else if (config_type == NFAPI_NR_DMRS_TYPE1){
if (n_dmrs_cdm_groups == 1) { //data is multiplexed
if (aatx == 0) {
unsigned short k = start_re;
for (unsigned short j = 0; j < 6*nb_rb_pdsch; j += 3) {
rxF_ext[j] = rxF[k+1];
rxF_ext[j+1] = rxF[k+3];
rxF_ext[j+2] = rxF[k+5];
k += 6;
if (k >= frame_parms->ofdm_symbol_size)
k -= frame_parms->ofdm_symbol_size;
}
}
for (unsigned short j = 0; j < 6*nb_rb_pdsch; j += 3) {
dl_ch0_ext[j] = dl_ch0[1];
dl_ch0_ext[j+1] = dl_ch0[3];
dl_ch0_ext[j+2] = dl_ch0[5];
dl_ch0 += 6;
k += 6;
if (k >= frame_parms->ofdm_symbol_size)
k -= frame_parms->ofdm_symbol_size;
}
}
}
else {//NFAPI_NR_DMRS_TYPE2
if (n_dmrs_cdm_groups == 1) { //data is multiplexed
if (aatx == 0) {
unsigned short k = start_re;
for (unsigned short j = 0; j < 8*nb_rb_pdsch; j += 4) {
rxF_ext[j] = rxF[k+2];
rxF_ext[j+1] = rxF[k+3];
rxF_ext[j+2] = rxF[k+4];
rxF_ext[j+3] = rxF[k+5];
k += 6;
if (k >= frame_parms->ofdm_symbol_size)
k -= frame_parms->ofdm_symbol_size;
}
}
for (unsigned short j = 0; j < 8*nb_rb_pdsch; j += 4) {
dl_ch0_ext[j] = dl_ch0[2];
dl_ch0_ext[j+1] = dl_ch0[3];
dl_ch0_ext[j+2] = dl_ch0[4];
dl_ch0_ext[j+3] = dl_ch0[5];
dl_ch0 += 6;
k += 6;
if (k >= frame_parms->ofdm_symbol_size)
k -= frame_parms->ofdm_symbol_size;
}
}
else if (n_dmrs_cdm_groups == 2) { //data is multiplexed
if (aatx == 0) {
unsigned short k = start_re;
for (unsigned short j = 0; j < 4*nb_rb_pdsch; j += 2) {
rxF_ext[j] = rxF[k+4];
rxF_ext[j+1] = rxF[k+5];
dl_ch0_ext[j] = dl_ch0[4];
dl_ch0_ext[j+1] = dl_ch0[5];
dl_ch0 += 6;
k += 6;
if (k >= frame_parms->ofdm_symbol_size)
k -= frame_parms->ofdm_symbol_size;
}
}
for (unsigned short j = 0; j < 4*nb_rb_pdsch; j += 2) {
dl_ch0_ext[j] = dl_ch0[4];
dl_ch0_ext[j+1] = dl_ch0[5];
dl_ch0 += 6;
}
}
return nb_rb_pdsch;
}
void nr_dlsch_extract_rbs(int **rxdataF,
int **dl_ch_estimates,
int **rxdataF_ext,
int **dl_ch_estimates_ext,
unsigned char symbol,
uint8_t pilots,
uint8_t config_type,
unsigned short start_rb,
unsigned short nb_rb_pdsch,
uint8_t n_dmrs_cdm_groups,
uint8_t Nl,
NR_DL_FRAME_PARMS *frame_parms,
uint16_t dlDmrsSymbPos,
int chest_time_type)
{
unsigned short k,rb;
unsigned char nushift,j,i,aarx,aatx;
int *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
int8_t validDmrsEst = 0; //store last DMRS Symbol index
if (config_type==NFAPI_NR_DMRS_TYPE1) {
AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2,
"n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
nushift = n_dmrs_cdm_groups -1;//delta in Table 7.4.1.1.2-1
} else {
AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2 || n_dmrs_cdm_groups == 3,
"n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
nushift = (n_dmrs_cdm_groups -1)<<1;//delta in Table 7.4.1.1.2-2
}
if (chest_time_type == 0)
validDmrsEst = get_valid_dmrs_idx_for_channel_est(dlDmrsSymbPos,symbol);
else
validDmrsEst = get_next_dmrs_symbol_in_slot(dlDmrsSymbPos,0,14); // get first dmrs symbol index
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
k = frame_parms->first_carrier_offset + NR_NB_SC_PER_RB*start_rb;
if (k>=frame_parms->ofdm_symbol_size)
k = k-frame_parms->ofdm_symbol_size;
rxF_ext = &rxdataF_ext[aarx][symbol*(nb_rb_pdsch*12)];
rxF = &rxdataF[aarx][(k+(symbol*(frame_parms->ofdm_symbol_size)))];
for (aatx=0; aatx<Nl; aatx++) {
dl_ch0 = &dl_ch_estimates[(aatx*frame_parms->nb_antennas_rx)+aarx][(validDmrsEst*(frame_parms->ofdm_symbol_size))];
dl_ch0_ext = &dl_ch_estimates_ext[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*(nb_rb_pdsch*NR_NB_SC_PER_RB)];
for (rb = 0; rb < nb_rb_pdsch; rb++)
{
if (pilots==0) {//data symbol only
if (aatx==0) {//Extract Rx signal only
memcpy((void*)rxF_ext,(void*)rxF,12*sizeof(*rxF_ext));
rxF_ext+=12;
}
memcpy((void*)dl_ch0_ext,(void*)dl_ch0,12*sizeof(*dl_ch0_ext));//Extract Channel Estimate
dl_ch0_ext+=12;
}
else {//the symbol contains DMRS
j=0;
if (config_type==NFAPI_NR_DMRS_TYPE1) {
if (nushift == 0) {//data is multiplexed
for (i = (1-nushift); i<12; i+=2) {
if (aatx==0) rxF_ext[j]=rxF[i];
dl_ch0_ext[j]=dl_ch0[i];
j++;
}
dl_ch0_ext+=6;
if (aatx==0) rxF_ext+=6;
}
}
else {//NFAPI_NR_DMRS_TYPE2
for (i = (2+nushift); i<6; i++) {
if (aatx==0) rxF_ext[j]=rxF[i];
dl_ch0_ext[j]=dl_ch0[i];
j++;
}
for (i = (8+nushift); i<12; i++) {
if (aatx==0) rxF_ext[j]=rxF[i];
dl_ch0_ext[j]=dl_ch0[i];
j++;
}
dl_ch0_ext+= j;
if (aatx==0) rxF_ext+= j;
}
}
dl_ch0+=12;
if (aatx==0) {
rxF+=12;
k+=12;
if (k>=frame_parms->ofdm_symbol_size) {
k=k-(frame_parms->ofdm_symbol_size);
rxF = &rxdataF[aarx][k+(symbol*(frame_parms->ofdm_symbol_size))];
}
}
}//rb
}//aatx
}//aarx
}
void nr_dlsch_detection_mrc(int **rxdataF_comp,
......
openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h
View file @ f8de6232
......@@ -680,39 +680,7 @@ void dlsch_detection_mrc_TM34(NR_DL_FRAME_PARMS *frame_parms,
unsigned short nb_rb,
unsigned char dual_stream_UE);
/** \fn dlsch_extract_rbs_single(int32_t **rxdataF,
int32_t **dl_ch_estimates,
int32_t **rxdataF_ext,
int32_t **dl_ch_estimates_ext,
uint32_t *rb_alloc,
uint8_t symbol,
NR_DL_FRAME_PARMS *frame_parms)
\brief This function extracts the received resource blocks, both channel estimates and data symbols,
for the current allocation and for single antenna eNB transmission.
@param rxdataF Raw FFT output of received signal
@param dl_ch_estimates Channel estimates of current slot
@param rxdataF_ext FFT output for RBs in this allocation
@param dl_ch_estimates_ext Channel estimates for RBs in this allocation
@param rb_alloc RB allocation vector
@param symbol Symbol to extract
@param n_dmrs_cdm_groups
@param frame_parms Pointer to frame descriptor
*/
unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
int **dl_ch_estimates,
int **rxdataF_ext,
int **dl_ch_estimates_ext,
unsigned char symbol,
uint8_t pilots,
uint8_t config_type,
unsigned short start_rb,
unsigned short nb_rb_pdsch,
uint8_t n_dmrs_cdm_groups,
NR_DL_FRAME_PARMS *frame_parms,
uint16_t dlDmrsSymbPos,
int chest_time_type);
/** \fn dlsch_extract_rbs_multiple(int32_t **rxdataF,
/** \fn dlsch_extract_rbs(int32_t **rxdataF,
int32_t **dl_ch_estimates,
int32_t **rxdataF_ext,
int32_t **dl_ch_estimates_ext,
......
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