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NR UE: modify shift value in nr_dlsch_mmse() for improved performance

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Thomas Schlichter
2025-08-25 09:29:38 +02:00
parent 598fbb5a24
commit e5b68fb6ee
1 changed files with 8 additions and 12 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
+8 -12
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@@ -80,7 +80,7 @@ unsigned char offset_mumimo_llr_drange[29][3]={{8,8,8},{7,7,7},{7,7,7},{7,7,7},{
/* compute the MMSE up to 4x4 matrices */
static void nr_dlsch_mmse(uint32_t rx_size_symbol,
unsigned char n_rx,
unsigned char n_tx, // number of layer
unsigned char nl, // number of layer
int32_t rxdataF_comp[][n_rx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
c16_t dl_ch_mag[][n_rx][rx_size_symbol],
c16_t dl_ch_magb[][n_rx][rx_size_symbol],
@@ -203,7 +203,7 @@ void nr_dlsch_scale_channel(uint32_t rx_size_symbol,
uint32_t len,
unsigned short nb_rb);
static void nr_dlsch_detection_mrc(uint32_t rx_size_symbol,
short n_tx,
short nl,
short n_rx,
int32_t rxdataF_comp[][n_rx][rx_size_symbol * NR_SYMBOLS_PER_SLOT],
int ***rho,
@@ -1456,7 +1456,7 @@ static void nr_dlsch_mmse(uint32_t rx_size_symbol,
int length,
uint32_t noise_var)
{
uint32_t nb_rb_0 = length / 12 + ((length % 12) ? 1 : 0);
uint32_t nb_rb_0 = (length + 11) / 12;
c16_t determ_fin[12 * nb_rb_0] __attribute__((aligned(32)));
///Allocate H^*H matrix elements and sub elements
@@ -1513,7 +1513,7 @@ static void nr_dlsch_mmse(uint32_t rx_size_symbol,
determ_fin, // determin
nb_rb_0,
fp_flag, // fixed point flag
shift - (fp_flag == 1 ? 2 : 0)); // the out put is Q15
shift - (fp_flag == 1 ? 1 : 0)); // the out put is Q15
// multiply Matrix inversion pf H_h_H by the rx signal vector
c16_t outtemp[12 * nb_rb_0] __attribute__((aligned(32)));
@@ -1531,7 +1531,7 @@ static void nr_dlsch_mmse(uint32_t rx_size_symbol,
(c16_t *)(rxdataF_comp[ctx][0] + symbol * rx_size_symbol),
outtemp,
sizeofArray(outtemp),
shift - (fp_flag == 1 ? 2 : 0));
shift - (fp_flag == 1 ? 1 : 0));
nr_a_sum_b(rxdataF_zforcing[rtx], outtemp, nb_rb_0); // a = a + b
}
#ifdef DEBUG_DLSCH_DEMOD
@@ -1582,13 +1582,9 @@ static void nr_dlsch_mmse(uint32_t rx_size_symbol,
dl_ch_mag128b_0[0] = mmtmpD2;
dl_ch_mag128r_0[0] = mmtmpD2;
dl_ch_mag128_0[0] = simde_mm_mulhi_epi16(dl_ch_mag128_0[0],QAM_amp128);
dl_ch_mag128_0[0] = simde_mm_slli_epi16(dl_ch_mag128_0[0],1);
dl_ch_mag128b_0[0] = simde_mm_mulhi_epi16(dl_ch_mag128b_0[0],QAM_amp128b);
dl_ch_mag128b_0[0] = simde_mm_slli_epi16(dl_ch_mag128b_0[0],1);
dl_ch_mag128r_0[0] = simde_mm_mulhi_epi16(dl_ch_mag128r_0[0],QAM_amp128r);
dl_ch_mag128r_0[0] = simde_mm_slli_epi16(dl_ch_mag128r_0[0],1);
dl_ch_mag128_0[0] = simde_mm_mulhrs_epi16(dl_ch_mag128_0[0], QAM_amp128);
dl_ch_mag128b_0[0] = simde_mm_mulhrs_epi16(dl_ch_mag128b_0[0],QAM_amp128b);
dl_ch_mag128r_0[0] = simde_mm_mulhrs_epi16(dl_ch_mag128r_0[0],QAM_amp128r);
determ_fin_128 += 1;
dl_ch_mag128_0 += 1;