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use common channel level for PDSCH

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This commit is contained in:
francescomani
2025-08-19 16:25:44 +02:00
parent 8d904dbf23
commit 6af8f5619a
1 changed files with 8 additions and 57 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
+8 -57
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@@ -193,20 +193,6 @@ static void nr_dlsch_channel_compensation(uint32_t rx_size_symbol,
unsigned char output_shift,
PHY_NR_MEASUREMENTS *measurements);
/** \brief This function computes the average channel level over all allocated RBs and antennas (TX/RX) in order to compute output shift for compensated signal
@param dl_ch_estimates_ext Channel estimates in allocated RBs
@param frame_parms Pointer to frame descriptor
@param avg Pointer to average signal strength
@param pilots_flag Flag to indicate pilots in symbol
@param nb_rb Number of allocated RBs
*/
static void nr_dlsch_channel_level(uint32_t rx_size_symbol,
int32_t dl_ch_estimates_ext[][rx_size_symbol],
uint8_t n_rx,
uint8_t n_tx,
int32_t avg[MAX_ANT][MAX_ANT],
uint32_t len);
void nr_dlsch_scale_channel(uint32_t rx_size_symbol,
int32_t dl_ch_estimates_ext[][rx_size_symbol],
NR_DL_FRAME_PARMS *frame_parms,
@@ -538,25 +524,25 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
//----------------------------------------------------------
start_meas_nr_ue_phy(ue, DLSCH_CHANNEL_LEVEL_STATS);
if (first_symbol_flag) {
int32_t avg[MAX_ANT][MAX_ANT] = {};
int32_t avg[nl * n_rx];
if (nb_re_pdsch)
nr_dlsch_channel_level(rx_size_symbol, dl_ch_estimates_ext, frame_parms->nb_antennas_rx, nl, avg, nb_re_pdsch);
nr_channel_level(0, rx_size_symbol, (c16_t (*)[rx_size_symbol])dl_ch_estimates_ext, n_rx, nl, avg, nb_re_pdsch);
else
LOG_E(NR_PHY, "Average channel level is 0: nb_rb_pdsch = %d, nb_re_pdsch = %d\n", nb_rb_pdsch, nb_re_pdsch);
int avgs = 0;
int32_t median[MAX_ANT][MAX_ANT];
for (int aatx = 0; aatx < nl; aatx++)
for (int l = 0; l < nl; l++)
for (int aarx = 0; aarx < n_rx; aarx++) {
avgs = cmax(avgs, avg[aatx][aarx]);
LOG_D(PHY, "nb_rb %d avg_%d_%d Power per SC is %d\n", nb_rb_pdsch, aarx, aatx, avg[aatx][aarx]);
avgs = cmax(avgs, avg[l * n_rx + aarx]);
LOG_D(PHY, "nb_rb %d avg_%d_%d Power per SC is %d\n", nb_rb_pdsch, aarx, l, avg[l * n_rx + aarx]);
LOG_D(PHY, "avgs Power per SC is %d\n", avgs);
median[aatx][aarx] = avg[aatx][aarx];
median[l][aarx] = avg[l * n_rx + aarx];
}
if (nl > 1) {
nr_dlsch_channel_level_median(rx_size_symbol, dl_ch_estimates_ext, median, nl, n_rx, nb_re_pdsch);
for (int aatx = 0; aatx < nl; aatx++) {
for (int l = 0; l < nl; l++) {
for (int aarx = 0; aarx < n_rx; aarx++) {
avgs = cmax(avgs, median[aatx][aarx]);
avgs = cmax(avgs, median[l][aarx]);
}
}
}
@@ -1032,41 +1018,6 @@ void nr_dlsch_scale_channel(uint32_t rx_size_symbol,
}
}
/** @brief This function computes the average channel level over all allocated RBs
* and antennas (TX/RX) in order to compute output shift for compensated signal
@param rx_size_symbol
@param dl_ch_estimates_ext Channel estimates in allocated RBs
@param n_rx number of antennas in RX
@param n_tx number of antennas in TX
@param avg Pointer to average signal strength
@param len Number of allocated PDSCH REs
*/
void nr_dlsch_channel_level(uint32_t rx_size_symbol,
int32_t dl_ch_estimates_ext[][rx_size_symbol],
uint8_t n_rx,
uint8_t n_tx,
int32_t avg[MAX_ANT][MAX_ANT],
uint32_t len)
{
int16_t x = factor2(len);
int16_t y = (len) >> x;
uint32_t nb_rb_0 = len / NR_NB_SC_PER_RB + ((len % NR_NB_SC_PER_RB) ? 1 : 0);
LOG_D(NR_PHY, "nb_rb_0 %d len %d = %d * 2^(%d)\n", nb_rb_0, len, y, x);
for (int aatx = 0; aatx < n_tx; aatx++) {
for (int aarx = 0; aarx < n_rx; aarx++) {
simde__m128i *dl_ch128 = (simde__m128i *)dl_ch_estimates_ext[(aatx * n_rx) + aarx];
//compute average level
avg[aatx][aarx] = simde_mm_average(dl_ch128, nb_rb_0 * 12, x, y);
//LOG_D(PHY, "Channel level: %d\n", avg[aatx][aarx]);
}
}
}
static void nr_dlsch_channel_level_median(uint32_t rx_size_symbol,
int32_t dl_ch_estimates_ext[][rx_size_symbol],
int32_t median[MAX_ANT][MAX_ANT],