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improvements in nr_dlsch_llr function

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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
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openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
+39 -69
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@@ -102,26 +102,20 @@ static void nr_dlsch_layer_demapping(int16_t *llr_cw[2],
int16_t llr_layers[][sz]);
/* compute LLR */
static int nr_dlsch_llr(uint32_t rx_size_symbol,
int nbRx,
uint 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 dl_ch_mag[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol],
NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch1_harq,
unsigned char harq_pid,
unsigned char first_symbol_flag,
unsigned char 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]);
static void nr_dlsch_llr(uint32_t rx_size_symbol,
int nbRx,
uint sz,
int16_t layer_llr[][sz],
int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
int32_t dl_ch_mag[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol],
NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch1_harq,
unsigned char symbol,
uint32_t len,
NR_UE_DLSCH_t dlsch[2],
uint32_t llr_offset_symbol);
/** \fn nr_dlsch_extract_rbs
\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 */
dl_valid_re[symbol-1] = nb_re_pdsch;
dl_valid_re[symbol] = nb_re_pdsch;
int startSymbIdx = 0;
int nbSymb = 0;
int pduBitmap = 0;
@@ -654,10 +648,10 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
(nb_rb_pdsch * 12),
dlsch[0].rnti,
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 */
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;
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];
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;
for(int i = startSymbIdx; i < startSymbIdx + nbSymb; i++) {
/* Calculate LLR's for each symbol */
start_meas_nr_ue_phy(ue, DLSCH_LLR_STATS);
nr_dlsch_llr(rx_size_symbol,
nbRx,
rx_llr_layer_size,
layer_llr,
frame_parms,
rxdataF_comp,
dl_ch_mag[0][0],
dl_ch_magb[0][0],
dl_ch_magr[0][0],
dlsch0_harq,
dlsch1_harq,
harq_pid,
first_symbol_flag,
i,
codeword_TB0,
codeword_TB1,
dl_valid_re[i - 1],
nr_slot_rx,
dl_valid_re[i],
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);
}
start_meas_nr_ue_phy(ue, DLSCH_LAYER_DEMAPPING);
nr_dlsch_layer_demapping(llr,
dlsch[0].Nl,
dlsch[0].dlsch_config.qamModOrder,
dlsch_config->qamModOrder,
G,
codeword_TB0,
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,
int nbRx,
uint 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 dl_ch_mag[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol],
NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch1_harq,
unsigned char harq_pid,
unsigned char first_symbol_flag,
unsigned char 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])
static void nr_dlsch_llr(uint32_t rx_size_symbol,
int nbRx,
uint sz,
int16_t layer_llr[][sz],
int32_t rxdataF_comp[][nbRx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
int32_t dl_ch_mag[rx_size_symbol],
int32_t dl_ch_magb[rx_size_symbol],
int32_t dl_ch_magr[rx_size_symbol],
NR_DL_UE_HARQ_t *dlsch0_harq,
NR_DL_UE_HARQ_t *dlsch1_harq,
unsigned char symbol,
uint32_t len,
NR_UE_DLSCH_t dlsch[2],
uint32_t llr_offset_symbol)
{
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) {
case 2 :
for(int l = 0; l < dlsch[0].Nl; l++)
@@ -1917,8 +1890,7 @@ static int nr_dlsch_llr(uint32_t rx_size_symbol,
break;
default:
LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
return(-1);
AssertFatal(false, "Unknown mod_order!!!!\n");
break;
}
@@ -1942,11 +1914,9 @@ static int nr_dlsch_llr(uint32_t rx_size_symbol,
break;
default:
LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
return(-1);
AssertFatal(false, "Unknown mod_order!!!!\n");
break;
}
}
return 0;
}
//==============================================================================================