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ULSCH power computation in a different way

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This commit is contained in:
rmagueta
2024-08-28 11:50:25 +01:00
parent 46a1d2a621
commit a3b753d8cb
2 changed files with 54 additions and 8 deletions
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openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
+53 -7
View File
@@ -1445,6 +1445,28 @@ static void nr_pusch_symbol_processing(void *arg)
}
}
static uint32_t average_u32(const uint32_t *x, uint16_t size)
{
AssertFatal(size > 0 && x != NULL, "x is NULL or size is 0\n");
uint64_t sum_x = 0;
simde__m256i vec_sum = simde_mm256_setzero_si256();
int i = 0;
for (; i + 8 <= size; i += 8) {
simde__m256i vec_data = simde_mm256_loadu_si256((simde__m256i *)&x[i]);
vec_sum = simde_mm256_add_epi32(vec_sum, vec_data);
}
uint32_t *vec_sum32 = (uint32_t *)&vec_sum;
for (int k = 0; k < 8; k++) {
sum_x += vec_sum32[k];
}
for (; i < size; i++) {
sum_x += x[i];
}
return (uint32_t)(sum_x / size);
}
int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
uint8_t ulsch_id,
@@ -1505,14 +1527,38 @@ int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
pusch_vars->ulsch_power[aarx] = 0;
pusch_vars->ulsch_noise_power[aarx] = 0;
}
for (int aatx = 0; aatx < rel15_ul->nrOfLayers; aatx++) {
pusch_vars->ulsch_power[aarx] += signal_energy_nodc(
(c16_t*)&pusch_vars->ul_ch_estimates[aatx * gNB->frame_parms.nb_antennas_rx + aarx][symbol * frame_parms->ofdm_symbol_size],
rel15_ul->rb_size * 12);
int64_t symb_energy = 0;
int start_sc = (rel15_ul->bwp_start + rel15_ul->rb_start) * NR_NB_SC_PER_RB;
int middle_sc = frame_parms->ofdm_symbol_size - frame_parms->first_carrier_offset;
int end_sc = (start_sc + rel15_ul->rb_size * NR_NB_SC_PER_RB - 1) % frame_parms->ofdm_symbol_size;
for (int s = rel15_ul->start_symbol_index; s < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols); s++) {
int offset0 = ((slot & 3) * frame_parms->symbols_per_slot + s) * frame_parms->ofdm_symbol_size;
int offset = offset0 + (frame_parms->first_carrier_offset + start_sc) % frame_parms->ofdm_symbol_size;
c16_t *ul_ch = &gNB->common_vars.rxdataF[aarx][offset];
if (end_sc < start_sc) {
int64_t symb_energy_aux = signal_energy_nodc(ul_ch, middle_sc - start_sc) * (middle_sc - start_sc);
ul_ch = &gNB->common_vars.rxdataF[aarx][offset0];
symb_energy_aux += (signal_energy_nodc(ul_ch, end_sc + 1) * (end_sc + 1));
symb_energy += symb_energy_aux / (rel15_ul->rb_size * NR_NB_SC_PER_RB);
} else {
symb_energy += signal_energy_nodc(ul_ch, rel15_ul->rb_size * NR_NB_SC_PER_RB);
}
}
for (int rb = 0; rb < rel15_ul->rb_size; rb++)
pusch_vars->ulsch_noise_power[aarx] +=
n0_subband_power[aarx][rel15_ul->bwp_start + rel15_ul->rb_start + rb] / rel15_ul->rb_size;
pusch_vars->ulsch_power[aarx] += (symb_energy / rel15_ul->nr_of_symbols);
pusch_vars->ulsch_noise_power[aarx] +=
average_u32(&n0_subband_power[aarx][rel15_ul->bwp_start + rel15_ul->rb_start], rel15_ul->rb_size);
LOG_D(PHY,
"aa %d, bwp_start%d, rb_start %d, rb_size %d: ulsch_power %d, ulsch_noise_power %d\n",
aarx,
rel15_ul->bwp_start,
rel15_ul->rb_start,
rel15_ul->rb_size,
pusch_vars->ulsch_power[aarx],
pusch_vars->ulsch_noise_power[aarx]);
}
}
}
openair1/PHY/defs_gNB.h
+1 -1
View File
@@ -347,7 +347,7 @@ typedef struct {
/// total signal over antennas
uint32_t ulsch_power_tot;
/// measured RX noise power
int ulsch_noise_power[8];
uint32_t ulsch_noise_power[8];
/// total noise over antennas
uint32_t ulsch_noise_power_tot;
/// \brief llr values.