maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

improvements in nr_dlsch_llr function

Browse Source
This commit is contained in:
francescomani
2024-09-02 17:28:44 +02:00
parent 2991370169
commit db098651b0
1 changed files with 39 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
+39 -69
View File
@@ -102,26 +102,20 @@ static void nr_dlsch_layer_demapping(int16_t *llr_cw[2],
int16_t llr_layers[][sz]); int16_t llr_layers[][sz]);
/* compute LLR */ /* compute LLR */
static int nr_dlsch_llr(uint32_t rx_size_symbol, static void nr_dlsch_llr(uint32_t rx_size_symbol,
int nbRx, int nbRx,
uint sz, uint sz,
int16_t layer_llr[][sz], int16_t layer_llr[][sz],
NR_DL_FRAME_PARMS *frame_parms, int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT], int32_t dl_ch_mag[rx_size_symbol],
int32_t dl_ch_mag[rx_size_symbol], int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol], int32_t dl_ch_magr[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol], NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch0_harq, NR_DL_UE_HARQ_t *dlsch1_harq,
NR_DL_UE_HARQ_t *dlsch1_harq, unsigned char symbol,
unsigned char harq_pid, uint32_t len,
unsigned char first_symbol_flag, NR_UE_DLSCH_t dlsch[2],
unsigned char symbol, uint32_t llr_offset_symbol);
int32_t codeword_TB0,
int32_t codeword_TB1,
uint32_t len,
uint8_t nr_slot_rx,
NR_UE_DLSCH_t dlsch[2],
uint32_t llr_offset[NR_SYMBOLS_PER_SLOT]);
/** \fn nr_dlsch_extract_rbs /** \fn nr_dlsch_extract_rbs
\brief This function extracts the received resource blocks, both channel estimates and data symbols, for the current \brief This function extracts the received resource blocks, both channel estimates and data symbols, for the current
@@ -626,7 +620,7 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
/* Store the valid DL RE's */ /* Store the valid DL RE's */
dl_valid_re[symbol-1] = nb_re_pdsch; dl_valid_re[symbol] = nb_re_pdsch;
int startSymbIdx = 0; int startSymbIdx = 0;
int nbSymb = 0; int nbSymb = 0;
int pduBitmap = 0; int pduBitmap = 0;
@@ -654,10 +648,10 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
(nb_rb_pdsch * 12), (nb_rb_pdsch * 12),
dlsch[0].rnti, dlsch[0].rnti,
dlsch); dlsch);
dl_valid_re[symbol - 1] -= ptrs_re_per_slot[0][symbol]; dl_valid_re[symbol] -= ptrs_re_per_slot[0][symbol];
} }
/* at last symbol in a slot calculate LLR's for whole slot */ /* at last symbol in a slot calculate LLR's for whole slot */
if(symbol == (startSymbIdx + nbSymb -1)) { if(symbol == (startSymbIdx + nbSymb - 1)) {
const uint32_t rx_llr_layer_size = (G + dlsch[0].Nl - 1) / dlsch[0].Nl; const uint32_t rx_llr_layer_size = (G + dlsch[0].Nl - 1) / dlsch[0].Nl;
if (dlsch[0].Nl == 0 || rx_llr_layer_size == 0 || rx_llr_layer_size > 10 * 1000 * 1000) { if (dlsch[0].Nl == 0 || rx_llr_layer_size == 0 || rx_llr_layer_size > 10 * 1000 * 1000) {
@@ -666,41 +660,32 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
} }
int16_t layer_llr[dlsch[0].Nl][rx_llr_layer_size]; int16_t layer_llr[dlsch[0].Nl][rx_llr_layer_size];
for(int i = startSymbIdx; i < startSymbIdx+nbSymb; i++) { for(int i = startSymbIdx; i < startSymbIdx + nbSymb; i++) {
/* re evaluating the first symbol flag as LLR's are done in symbol loop */
if(i == startSymbIdx && i < 3)
first_symbol_flag = 1;
else
first_symbol_flag = 0;
/* Calculate LLR's for each symbol */ /* Calculate LLR's for each symbol */
start_meas_nr_ue_phy(ue, DLSCH_LLR_STATS); start_meas_nr_ue_phy(ue, DLSCH_LLR_STATS);
nr_dlsch_llr(rx_size_symbol, nr_dlsch_llr(rx_size_symbol,
nbRx, nbRx,
rx_llr_layer_size, rx_llr_layer_size,
layer_llr, layer_llr,
frame_parms,
rxdataF_comp, rxdataF_comp,
dl_ch_mag[0][0], dl_ch_mag[0][0],
dl_ch_magb[0][0], dl_ch_magb[0][0],
dl_ch_magr[0][0], dl_ch_magr[0][0],
dlsch0_harq, dlsch0_harq,
dlsch1_harq, dlsch1_harq,
harq_pid,
first_symbol_flag,
i, i,
codeword_TB0, dl_valid_re[i],
codeword_TB1,
dl_valid_re[i - 1],
nr_slot_rx,
dlsch, dlsch,
llr_offset); llr_offset[i]);
if (i < startSymbIdx + nbSymb - 1) // up to the penultimate symbol
llr_offset[i + 1] = dl_valid_re[i] * dlsch_config->qamModOrder + llr_offset[i];
stop_meas_nr_ue_phy(ue, DLSCH_LLR_STATS); stop_meas_nr_ue_phy(ue, DLSCH_LLR_STATS);
} }
start_meas_nr_ue_phy(ue, DLSCH_LAYER_DEMAPPING); start_meas_nr_ue_phy(ue, DLSCH_LAYER_DEMAPPING);
nr_dlsch_layer_demapping(llr, nr_dlsch_layer_demapping(llr,
dlsch[0].Nl, dlsch[0].Nl,
dlsch[0].dlsch_config.qamModOrder, dlsch_config->qamModOrder,
G, G,
codeword_TB0, codeword_TB0,
codeword_TB1, codeword_TB1,
@@ -1868,33 +1853,21 @@ static void nr_dlsch_layer_demapping(int16_t *llr_cw[2],
} }
} }
static int nr_dlsch_llr(uint32_t rx_size_symbol, static void nr_dlsch_llr(uint32_t rx_size_symbol,
int nbRx, int nbRx,
uint sz, uint sz,
int16_t layer_llr[][sz], int16_t layer_llr[][sz],
NR_DL_FRAME_PARMS *frame_parms, int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT], int32_t dl_ch_mag[rx_size_symbol],
int32_t dl_ch_mag[rx_size_symbol], int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol], int32_t dl_ch_magr[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol], NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch0_harq, NR_DL_UE_HARQ_t *dlsch1_harq,
NR_DL_UE_HARQ_t *dlsch1_harq, unsigned char symbol,
unsigned char harq_pid, uint32_t len,
unsigned char first_symbol_flag, NR_UE_DLSCH_t dlsch[2],
unsigned char symbol, uint32_t llr_offset_symbol)
int32_t codeword_TB0,
int32_t codeword_TB1,
uint32_t len,
uint8_t nr_slot_rx,
NR_UE_DLSCH_t dlsch[2],
uint32_t llr_offset[14])
{ {
if (first_symbol_flag == 1)
llr_offset[symbol - 1] = 0;
uint32_t llr_offset_symbol = llr_offset[symbol - 1];
llr_offset[symbol] = len * dlsch[0].dlsch_config.qamModOrder + llr_offset_symbol;
switch (dlsch[0].dlsch_config.qamModOrder) { switch (dlsch[0].dlsch_config.qamModOrder) {
case 2 : case 2 :
for(int l = 0; l < dlsch[0].Nl; l++) for(int l = 0; l < dlsch[0].Nl; l++)
@@ -1917,8 +1890,7 @@ static int nr_dlsch_llr(uint32_t rx_size_symbol,
break; break;
default: default:
LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n"); AssertFatal(false, "Unknown mod_order!!!!\n");
return(-1);
break; break;
} }
@@ -1942,11 +1914,9 @@ static int nr_dlsch_llr(uint32_t rx_size_symbol,
break; break;
default: default:
LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n"); AssertFatal(false, "Unknown mod_order!!!!\n");
return(-1);
break; break;
} }
} }
return 0;
} }
//============================================================================================== //==============================================================================================