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Correct data offset for unscrambling in PUSCH processing

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Correctly compute the offset of data to unscramble in PUSCH processing
at the gNB. Rename variables to make them easier to spot (instead of
"s"), and remove a global variable.

Closes: #734
This commit is contained in:
Laurent THOMAS
2024-05-22 09:04:33 +02:00
committed by Robert Schmidt
parent 82bd07ebd5
commit 6379350f51
2 changed files with 26 additions and 25 deletions
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openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
+26 -10
View File
@@ -1389,6 +1389,20 @@ static void inner_rx(PHY_VARS_gNB *gNB,
rel15_ul->qam_mod_order);
}
typedef struct puschSymbolProc_s {
PHY_VARS_gNB *gNB;
NR_DL_FRAME_PARMS *frame_parms;
nfapi_nr_pusch_pdu_t *rel15_ul;
int ulsch_id;
int slot;
int startSymbol;
int numSymbols;
int16_t *llr;
int16_t **llr_layers;
int16_t *scramblingSequence;
uint32_t nvar;
} puschSymbolProc_t;
static void nr_pusch_symbol_processing(void *arg)
{
puschSymbolProc_t *rdata=(puschSymbolProc_t*)arg;
@@ -1438,8 +1452,10 @@ static void nr_pusch_symbol_processing(void *arg)
}
// unscrambling
int16_t *llr16 = (int16_t*)&rdata->llr[pusch_vars->llr_offset[symbol] * rel15_ul->nrOfLayers];
for (int i = 0; i < (nb_re_pusch * rel15_ul->qam_mod_order * rel15_ul->nrOfLayers); i++)
llr16[i] = llr_ptr[i] * rdata->s[i];
int16_t *s = rdata->scramblingSequence + pusch_vars->llr_offset[symbol] * rel15_ul->nrOfLayers;
const int end = nb_re_pusch * rel15_ul->qam_mod_order * rel15_ul->nrOfLayers;
for (int i = 0; i < end; i++)
llr16[i] = llr_ptr[i] * s[i];
}
}
@@ -1455,7 +1471,7 @@ int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
NR_gNB_PUSCH *pusch_vars = &gNB->pusch_vars[ulsch_id];
pusch_vars->dmrs_symbol = INVALID_VALUE;
gNB->nbSymb = 0;
int nbSymb = 0;
uint32_t bwp_start_subcarrier = ((rel15_ul->rb_start + rel15_ul->bwp_start) * NR_NB_SC_PER_RB + frame_parms->first_carrier_offset) % frame_parms->ofdm_symbol_size;
LOG_D(PHY,"pusch %d.%d : bwp_start_subcarrier %d, rb_start %d, first_carrier_offset %d\n", frame,slot,bwp_start_subcarrier, rel15_ul->rb_start, frame_parms->first_carrier_offset);
LOG_D(PHY,"pusch %d.%d : ul_dmrs_symb_pos %x\n",frame,slot,rel15_ul->ul_dmrs_symb_pos);
@@ -1571,9 +1587,9 @@ int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
gNB->ulsch[ulsch_id].unav_res = unav_res;
// initialize scrambling sequence //
int16_t s[G+96] __attribute__((aligned(32)));
int16_t scramblingSequence[G + 96] __attribute__((aligned(32)));
nr_codeword_unscrambling_init(s, G, 0, rel15_ul->data_scrambling_id, rel15_ul->rnti);
nr_codeword_unscrambling_init(scramblingSequence, G, 0, rel15_ul->data_scrambling_id, rel15_ul->rnti);
// first the computation of channel levels
@@ -1674,23 +1690,23 @@ int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
rdata->ulsch_id = ulsch_id;
rdata->llr = pusch_vars->llr;
rdata->llr_layers = pusch_vars->llr_layers;
rdata->s = &s[pusch_vars->llr_offset[symbol]*rel15_ul->nrOfLayers];
rdata->scramblingSequence = scramblingSequence;
rdata->nvar = nvar;
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
nr_pusch_symbol_processing(rdata);
} else {
pushTpool(&gNB->threadPool, req);
gNB->nbSymb++;
nbSymb++;
}
LOG_D(PHY,"%d.%d Added symbol %d (count %d) to process, in pipe\n",frame,slot,symbol,gNB->nbSymb);
LOG_D(PHY, "%d.%d Added symbol %d (count %d) to process, in pipe\n", frame, slot, symbol, nbSymb);
}
} // symbol loop
while (gNB->nbSymb > 0) {
while (nbSymb) {
notifiedFIFO_elt_t *req = pullTpool(&gNB->respPuschSymb, &gNB->threadPool);
gNB->nbSymb--;
nbSymb--;
delNotifiedFIFO_elt(req);
}
openair1/PHY/defs_gNB.h
-15
View File
@@ -716,7 +716,6 @@ typedef struct PHY_VARS_gNB_s {
notifiedFIFO_t L1_rx_out;
notifiedFIFO_t resp_RU_tx;
tpool_t threadPool;
int nbSymb;
int num_pusch_symbols_per_thread;
pthread_t L1_rx_thread;
int L1_rx_thread_core;
@@ -728,20 +727,6 @@ typedef struct PHY_VARS_gNB_s {
rt_L1_profiling_t rt_L1_profiling;
} PHY_VARS_gNB;
typedef struct puschSymbolProc_s {
PHY_VARS_gNB *gNB;
NR_DL_FRAME_PARMS *frame_parms;
nfapi_nr_pusch_pdu_t *rel15_ul;
int ulsch_id;
int slot;
int startSymbol;
int numSymbols;
int16_t *llr;
int16_t **llr_layers;
int16_t *s;
uint32_t nvar;
} puschSymbolProc_t;
struct puschSymbolReqId {
uint16_t ulsch_id;
uint16_t frame;