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openairinterface5g/openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
T
Robert Schmidt 321c475176 Fix integer overflow 
avoid UBsan error:
  openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c:459:77: runtime error: signed integer overflo w: 2009540296 + 668087372 cannot be represented in type 'int'
2024-06-06 12:36:40 +02:00

1715 lines
67 KiB
C
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#include "PHY/defs_gNB.h"
#include "PHY/phy_extern.h"
#include "nr_transport_proto.h"
#include "PHY/impl_defs_top.h"
#include "PHY/NR_TRANSPORT/nr_sch_dmrs.h"
#include "PHY/NR_REFSIG/dmrs_nr.h"
#include "PHY/NR_REFSIG/ptrs_nr.h"
#include "PHY/NR_ESTIMATION/nr_ul_estimation.h"
#include "PHY/defs_nr_common.h"
#include "common/utils/nr/nr_common.h"
#include <openair1/PHY/TOOLS/phy_scope_interface.h>
#include "PHY/sse_intrin.h"
#define INVALID_VALUE 255
void nr_idft(int32_t *z, uint32_t Msc_PUSCH)
{
simde__m128i idft_in128[1][3240], idft_out128[1][3240];
simde__m128i norm128;
int16_t *idft_in0 = (int16_t*)idft_in128[0], *idft_out0 = (int16_t*)idft_out128[0];
int i, ip;
LOG_T(PHY,"Doing lte_idft for Msc_PUSCH %d\n",Msc_PUSCH);
if ((Msc_PUSCH % 1536) > 0) {
// conjugate input
for (i = 0; i < (Msc_PUSCH>>2); i++) {
*&(((simde__m128i*)z)[i]) = simde_mm_sign_epi16(*&(((simde__m128i*)z)[i]), *(simde__m128i*)&conjugate2[0]);
}
for (i = 0, ip = 0; i < Msc_PUSCH; i++, ip+=4)
((uint32_t*)idft_in0)[ip+0] = z[i];
}
switch (Msc_PUSCH) {
case 12:
dft(DFT_12,(int16_t *)idft_in0, (int16_t *)idft_out0,0);
norm128 = simde_mm_set1_epi16(9459);
for (i = 0; i < 12; i++) {
((simde__m128i*)idft_out0)[i] = simde_mm_slli_epi16(simde_mm_mulhi_epi16(((simde__m128i*)idft_out0)[i], norm128), 1);
}
break;
case 24:
dft(DFT_24,idft_in0, idft_out0, 1);
break;
case 36:
dft(DFT_36,idft_in0, idft_out0, 1);
break;
case 48:
dft(DFT_48,idft_in0, idft_out0, 1);
break;
case 60:
dft(DFT_60,idft_in0, idft_out0, 1);
break;
case 72:
dft(DFT_72,idft_in0, idft_out0, 1);
break;
case 96:
dft(DFT_96,idft_in0, idft_out0, 1);
break;
case 108:
dft(DFT_108,idft_in0, idft_out0, 1);
break;
case 120:
dft(DFT_120,idft_in0, idft_out0, 1);
break;
case 144:
dft(DFT_144,idft_in0, idft_out0, 1);
break;
case 180:
dft(DFT_180,idft_in0, idft_out0, 1);
break;
case 192:
dft(DFT_192,idft_in0, idft_out0, 1);
break;
case 216:
dft(DFT_216,idft_in0, idft_out0, 1);
break;
case 240:
dft(DFT_240,idft_in0, idft_out0, 1);
break;
case 288:
dft(DFT_288,idft_in0, idft_out0, 1);
break;
case 300:
dft(DFT_300,idft_in0, idft_out0, 1);
break;
case 324:
dft(DFT_324,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 360:
dft(DFT_360,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 384:
dft(DFT_384,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 432:
dft(DFT_432,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 480:
dft(DFT_480,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 540:
dft(DFT_540,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 576:
dft(DFT_576,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 600:
dft(DFT_600,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 648:
dft(DFT_648,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 720:
dft(DFT_720,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 768:
dft(DFT_768,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 864:
dft(DFT_864,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 900:
dft(DFT_900,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 960:
dft(DFT_960,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 972:
dft(DFT_972,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1080:
dft(DFT_1080,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1152:
dft(DFT_1152,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1200:
dft(DFT_1200,idft_in0, idft_out0, 1);
break;
case 1296:
dft(DFT_1296,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1440:
dft(DFT_1440,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1500:
dft(DFT_1500,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1536:
//dft(DFT_1536,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
idft(IDFT_1536,(int16_t*)z, (int16_t*)z, 1);
break;
case 1620:
dft(DFT_1620,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1728:
dft(DFT_1728,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1800:
dft(DFT_1800,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1920:
dft(DFT_1920,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 1944:
dft(DFT_1944,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2160:
dft(DFT_2160,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2304:
dft(DFT_2304,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2400:
dft(DFT_2400,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2592:
dft(DFT_2592,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2700:
dft(DFT_2700,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2880:
dft(DFT_2880,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 2916:
dft(DFT_2916,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 3000:
dft(DFT_3000,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
case 3072:
//dft(DFT_3072,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
idft(IDFT_3072,(int16_t*)z, (int16_t*)z, 1);
break;
case 3240:
dft(DFT_3240,(int16_t*)idft_in0, (int16_t*)idft_out0, 1);
break;
default:
// should not be reached
LOG_E( PHY, "Unsupported Msc_PUSCH value of %"PRIu16"\n", Msc_PUSCH );
return;
}
if ((Msc_PUSCH % 1536) > 0) {
for (i = 0, ip = 0; i < Msc_PUSCH; i++, ip+=4)
z[i] = ((uint32_t*)idft_out0)[ip];
// conjugate output
for (i = 0; i < (Msc_PUSCH>>2); i++) {
((simde__m128i*)z)[i] = simde_mm_sign_epi16(((simde__m128i*)z)[i], *(simde__m128i*)&conjugate2[0]);
}
}
simde_mm_empty();
simde_m_empty();
}
static void nr_ulsch_extract_rbs (c16_t* const rxdataF,
c16_t* const chF,
c16_t *rxFext,
c16_t *chFext,
int rxoffset,
int choffset,
int aarx,
int is_dmrs_symbol,
nfapi_nr_pusch_pdu_t *pusch_pdu,
NR_DL_FRAME_PARMS *frame_parms)
{
uint8_t delta = 0;
int start_re = (frame_parms->first_carrier_offset + (pusch_pdu->rb_start + pusch_pdu->bwp_start) * NR_NB_SC_PER_RB)%frame_parms->ofdm_symbol_size;
int nb_re_pusch = NR_NB_SC_PER_RB * pusch_pdu->rb_size;
c16_t *rxF = &rxdataF[rxoffset];
c16_t *rxF_ext = &rxFext[0];
c16_t *ul_ch0 = &chF[choffset];
c16_t *ul_ch0_ext = &chFext[0];
if (is_dmrs_symbol == 0) {
if (start_re + nb_re_pusch <= frame_parms->ofdm_symbol_size)
memcpy(rxF_ext, &rxF[start_re], nb_re_pusch * sizeof(c16_t));
else
{
int neg_length = frame_parms->ofdm_symbol_size - start_re;
int pos_length = nb_re_pusch - neg_length;
memcpy(rxF_ext, &rxF[start_re], neg_length * sizeof(c16_t));
memcpy(&rxF_ext[neg_length], rxF, pos_length * sizeof(c16_t));
}
memcpy(ul_ch0_ext, ul_ch0, nb_re_pusch * sizeof(c16_t));
}
else if (pusch_pdu->dmrs_config_type == pusch_dmrs_type1) // 6 REs / PRB
{
AssertFatal(delta == 0 || delta == 1, "Illegal delta %d\n",delta);
c16_t *rxF32 = &rxF[start_re];
if (start_re + nb_re_pusch < frame_parms->ofdm_symbol_size) {
for (int idx = 1 - delta; idx < nb_re_pusch; idx += 2)
{
*rxF_ext++ = rxF32[idx];
*ul_ch0_ext++ = ul_ch0[idx];
}
}
else // handle the two pieces around DC
{
int neg_length = frame_parms->ofdm_symbol_size - start_re;
int pos_length = nb_re_pusch - neg_length;
int idx, idx2;
for (idx = 1 - delta; idx < neg_length; idx += 2)
{
*rxF_ext++ = rxF32[idx];
*ul_ch0_ext++= ul_ch0[idx];
}
rxF32 = rxF;
idx2 = idx;
for (idx = 1 - delta; idx < pos_length; idx += 2, idx2 += 2)
{
*rxF_ext++ = rxF32[idx];
*ul_ch0_ext++ = ul_ch0[idx2];
}
}
}
else if (pusch_pdu->dmrs_config_type == pusch_dmrs_type2) // 8 REs / PRB
{
AssertFatal(delta==0||delta==2||delta==4,"Illegal delta %d\n",delta);
if (start_re + nb_re_pusch < frame_parms->ofdm_symbol_size)
{
for (int idx = 0; idx < nb_re_pusch; idx ++)
{
if (idx % 6 == 2 * delta || idx % 6 == 2 * delta + 1)
continue;
*rxF_ext++ = rxF[idx];
*ul_ch0_ext++ = ul_ch0[idx];
}
}
else
{
int neg_length = frame_parms->ofdm_symbol_size - start_re;
int pos_length = nb_re_pusch - neg_length;
c16_t *rxF64 = &rxF[start_re];
int idx, idx2;
for (idx = 0; idx < neg_length; idx ++)
{
if (idx % 6 == 2 * delta || idx % 6 == 2 * delta + 1)
continue;
*rxF_ext++ = rxF64[idx];
*ul_ch0_ext++ = ul_ch0[idx];
}
rxF64 = rxF;
idx2 = idx;
for (idx = 0; idx < pos_length; idx++, idx2++)
{
if (idx % 6 == 2 * delta || idx % 6 == 2 * delta + 1)
continue;
*rxF_ext++ = rxF64[idx];
*ul_ch0_ext++ = ul_ch0[idx2];
}
}
}
}
static void nr_ulsch_scale_channel(int **ul_ch_estimates_ext,
NR_DL_FRAME_PARMS *frame_parms,
uint8_t symbol,
uint8_t is_dmrs_symbol,
uint32_t len,
uint8_t nrOfLayers,
unsigned short nb_rb,
int shift_ch_ext)
{
// Determine scaling amplitude based the symbol
int b = 3;
short ch_amp = 1024 * 8;
if (shift_ch_ext > 3) {
b = 0;
ch_amp >>= (shift_ch_ext - 3);
if (ch_amp == 0) {
ch_amp = 1;
}
} else {
b -= shift_ch_ext;
}
simde__m128i ch_amp128 = simde_mm_set1_epi16(ch_amp); // Q3.13
LOG_D(PHY, "Scaling PUSCH Chest in OFDM symbol %d by %d, pilots %d nb_rb %d NCP %d symbol %d\n", symbol, ch_amp, is_dmrs_symbol, nb_rb, frame_parms->Ncp, symbol);
for (int aatx = 0; aatx < nrOfLayers; aatx++) {
for (int aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
simde__m128i *ul_ch128 = (simde__m128i *)&ul_ch_estimates_ext[aatx * frame_parms->nb_antennas_rx + aarx][symbol * len];
for (int i = 0; i < len >> 2; i++) {
ul_ch128[i] = simde_mm_mulhi_epi16(ul_ch128[i], ch_amp128);
ul_ch128[i] = simde_mm_slli_epi16(ul_ch128[i], b);
}
}
}
}
static int get_nb_re_pusch (NR_DL_FRAME_PARMS *frame_parms, nfapi_nr_pusch_pdu_t *rel15_ul,int symbol)
{
uint8_t dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
if (dmrs_symbol_flag == 1) {
if ((rel15_ul->ul_dmrs_symb_pos >> ((symbol + 1) % frame_parms->symbols_per_slot)) & 0x01)
AssertFatal(1==0,"Double DMRS configuration is not yet supported\n");
if (rel15_ul->dmrs_config_type == 0) {
// if no data in dmrs cdm group is 1 only even REs have no data
// if no data in dmrs cdm group is 2 both odd and even REs have no data
return(rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*6)));
}
else return(rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*4)));
} else return(rel15_ul->rb_size * NR_NB_SC_PER_RB);
}
// compute average channel_level on each (TX,RX) antenna pair
static void nr_ulsch_channel_level(int **ul_ch_estimates_ext,
NR_DL_FRAME_PARMS *frame_parms,
int32_t *avg,
uint8_t symbol,
uint32_t len,
uint8_t nrOfLayers)
{
simde__m128i *ul_ch128, avg128U;
int16_t x = factor2(len);
int16_t y = (len)>>x;
for (int aatx = 0; aatx < nrOfLayers; aatx++) {
for (int aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
//clear average level
avg128U = simde_mm_setzero_si128();
ul_ch128 = (simde__m128i *)&ul_ch_estimates_ext[aatx*frame_parms->nb_antennas_rx+aarx][symbol * len];
for (int i = 0; i < len >> 2; i++) {
avg128U = simde_mm_add_epi32(avg128U, simde_mm_srai_epi32(simde_mm_madd_epi16(ul_ch128[i], ul_ch128[i]), x));
}
int32_t *avg32i = (int32_t *)&avg128U;
int64_t avg64 = (int64_t)avg32i[0] + avg32i[1] + avg32i[2] + avg32i[3];
avg[aatx * frame_parms->nb_antennas_rx + aarx] = avg64 / y;
}
}
simde_mm_empty();
simde_m_empty();
}
static void nr_ulsch_channel_compensation(c16_t *rxFext,
c16_t *chFext,
c16_t *ul_ch_maga,
c16_t *ul_ch_magb,
c16_t *ul_ch_magc,
int32_t **rxComp,
c16_t *rho,
NR_DL_FRAME_PARMS *frame_parms,
nfapi_nr_pusch_pdu_t* rel15_ul,
uint32_t symbol,
uint32_t buffer_length,
uint32_t output_shift)
{
int mod_order = rel15_ul->qam_mod_order;
int nrOfLayers = rel15_ul->nrOfLayers;
int nb_rx_ant = frame_parms->nb_antennas_rx;
simde__m256i QAM_ampa_256 = simde_mm256_setzero_si256();
simde__m256i QAM_ampb_256 = simde_mm256_setzero_si256();
simde__m256i QAM_ampc_256 = simde_mm256_setzero_si256();
if (mod_order == 4) {
QAM_ampa_256 = simde_mm256_set1_epi16(QAM16_n1);
QAM_ampb_256 = simde_mm256_setzero_si256();
QAM_ampc_256 = simde_mm256_setzero_si256();
}
else if (mod_order == 6) {
QAM_ampa_256 = simde_mm256_set1_epi16(QAM64_n1);
QAM_ampb_256 = simde_mm256_set1_epi16(QAM64_n2);
QAM_ampc_256 = simde_mm256_setzero_si256();
}
else if (mod_order == 8) {
QAM_ampa_256 = simde_mm256_set1_epi16(QAM256_n1);
QAM_ampb_256 = simde_mm256_set1_epi16(QAM256_n2);
QAM_ampc_256 = simde_mm256_set1_epi16(QAM256_n3);
}
simde__m256i xmmp0, xmmp1, xmmp2, xmmp3, xmmp4;
simde__m256i complex_shuffle256 = simde_mm256_set_epi8(29,28,31,30,25,24,27,26,21,20,23,22,17,16,19,18,13,12,15,14,9,8,11,10,5,4,7,6,1,0,3,2);
simde__m256i conj256 = simde_mm256_set_epi16(1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1);
for (int aatx = 0; aatx < nrOfLayers; aatx++) {
simde__m256i *rxComp_256 = (simde__m256i*) &rxComp[aatx * nb_rx_ant][symbol * buffer_length];
simde__m256i *rxF_ch_maga_256 = (simde__m256i*)&ul_ch_maga[aatx * buffer_length];
simde__m256i *rxF_ch_magb_256 = (simde__m256i*)&ul_ch_magb[aatx * buffer_length];
simde__m256i *rxF_ch_magc_256 = (simde__m256i*)&ul_ch_magc[aatx * buffer_length];
for (int aarx = 0; aarx < nb_rx_ant; aarx++) {
simde__m256i *rxF_256 = (simde__m256i*) &rxFext[aarx * buffer_length];
simde__m256i *chF_256 = (simde__m256i*) &chFext[(aatx * nb_rx_ant + aarx) * buffer_length];
for (int i = 0; i < buffer_length >> 3; i++)
{
xmmp0 = simde_mm256_madd_epi16(chF_256[i], rxF_256[i]);
// xmmp0 contains real part of 4 consecutive outputs (32-bit) of conj(H_m[i])*R_m[i]
xmmp1 = simde_mm256_shuffle_epi8(chF_256[i], complex_shuffle256);
xmmp1 = simde_mm256_sign_epi16(xmmp1, conj256);
xmmp1 = simde_mm256_madd_epi16(xmmp1, rxF_256[i]);
// xmmp1 contains imag part of 4 consecutive outputs (32-bit) of conj(H_m[i])*R_m[i]
xmmp0 = simde_mm256_srai_epi32(xmmp0, output_shift);
xmmp1 = simde_mm256_srai_epi32(xmmp1, output_shift);
xmmp2 = simde_mm256_unpacklo_epi32(xmmp0, xmmp1);
xmmp3 = simde_mm256_unpackhi_epi32(xmmp0, xmmp1);
xmmp4 = simde_mm256_packs_epi32(xmmp2, xmmp3);
xmmp0 = simde_mm256_madd_epi16(chF_256[i], chF_256[i]); // |h|^2
xmmp0 = simde_mm256_srai_epi32(xmmp0, output_shift);
xmmp0 = simde_mm256_packs_epi32(xmmp0, xmmp0);
xmmp1 = simde_mm256_unpacklo_epi16(xmmp0, xmmp0);
xmmp2 = simde_mm256_mulhrs_epi16(xmmp1, QAM_ampa_256);
xmmp3 = simde_mm256_mulhrs_epi16(xmmp1, QAM_ampb_256);
xmmp1 = simde_mm256_mulhrs_epi16(xmmp1, QAM_ampc_256);
// MRC
rxComp_256[i] = simde_mm256_add_epi16(rxComp_256[i], xmmp4);
if (mod_order > 2)
rxF_ch_maga_256[i] = simde_mm256_add_epi16(rxF_ch_maga_256[i], xmmp2);
if (mod_order > 4)
rxF_ch_magb_256[i] = simde_mm256_add_epi16(rxF_ch_magb_256[i], xmmp3);
if (mod_order > 6)
rxF_ch_magc_256[i] = simde_mm256_add_epi16(rxF_ch_magc_256[i], xmmp1);
}
if (rho != NULL) {
for (int atx = 0; atx < nrOfLayers; atx++) {
simde__m256i *rho_256 = (simde__m256i * )&rho[(aatx * nrOfLayers + atx) * buffer_length];
simde__m256i *chF_256 = (simde__m256i *)&chFext[(aatx * nb_rx_ant + aarx) * buffer_length];
simde__m256i *chF2_256 = (simde__m256i *)&chFext[ (atx * nb_rx_ant + aarx) * buffer_length];
for (int i = 0; i < buffer_length >> 3; i++) {
// multiply by conjugated channel
xmmp0 = simde_mm256_madd_epi16(chF_256[i], chF2_256[i]);
// xmmp0 contains real part of 4 consecutive outputs (32-bit)
xmmp1 = simde_mm256_shuffle_epi8(chF_256[i], complex_shuffle256);
xmmp1 = simde_mm256_sign_epi16(xmmp1, conj256);
xmmp1 = simde_mm256_madd_epi16(xmmp1, chF2_256[i]);
// xmmp0 contains imag part of 4 consecutive outputs (32-bit)
xmmp0 = simde_mm256_srai_epi32(xmmp0, output_shift);
xmmp1 = simde_mm256_srai_epi32(xmmp1, output_shift);
xmmp2 = simde_mm256_unpacklo_epi32(xmmp0, xmmp1);
xmmp3 = simde_mm256_unpackhi_epi32(xmmp0, xmmp1);
rho_256[i] = simde_mm256_adds_epi16(rho_256[i], simde_mm256_packs_epi32(xmmp2, xmmp3));
}
}
}
}
}
simde_mm_empty();
simde_m_empty();
}
// Zero Forcing Rx function: nr_det_HhH()
static void nr_ulsch_det_HhH (int32_t *after_mf_00,//a
int32_t *after_mf_01,//b
int32_t *after_mf_10,//c
int32_t *after_mf_11,//d
int32_t *det_fin,//1/ad-bc
unsigned short nb_rb,
unsigned char symbol,
int32_t shift)
{
int16_t nr_conjug2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;
unsigned short rb;
simde__m128i *after_mf_00_128,*after_mf_01_128, *after_mf_10_128, *after_mf_11_128, ad_re_128, bc_re_128; //ad_im_128, bc_im_128;
simde__m128i *det_fin_128, det_re_128; //det_im_128, tmp_det0, tmp_det1;
after_mf_00_128 = (simde__m128i *)after_mf_00;
after_mf_01_128 = (simde__m128i *)after_mf_01;
after_mf_10_128 = (simde__m128i *)after_mf_10;
after_mf_11_128 = (simde__m128i *)after_mf_11;
det_fin_128 = (simde__m128i *)det_fin;
for (rb=0; rb<3*nb_rb; rb++) {
//complex multiplication (I_a+jQ_a)(I_d+jQ_d) = (I_aI_d - Q_aQ_d) + j(Q_aI_d + I_aQ_d)
//The imag part is often zero, we compute only the real part
ad_re_128 = simde_mm_sign_epi16(after_mf_00_128[0],*(simde__m128i*)&nr_conjug2[0]);
ad_re_128 = simde_mm_madd_epi16(ad_re_128,after_mf_11_128[0]); //Re: I_a0*I_d0 - Q_a1*Q_d1
//ad_im_128 = simde_mm_shufflelo_epi16(after_mf_00_128[0], SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
//ad_im_128 = simde_mm_shufflehi_epi16(ad_im_128, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
//ad_im_128 = simde_mm_madd_epi16(ad_im_128,after_mf_11_128[0]);//Im: (Q_aI_d + I_aQ_d)
//complex multiplication (I_b+jQ_b)(I_c+jQ_c) = (I_bI_c - Q_bQ_c) + j(Q_bI_c + I_bQ_c)
//The imag part is often zero, we compute only the real part
bc_re_128 = simde_mm_sign_epi16(after_mf_01_128[0],*(simde__m128i*)&nr_conjug2[0]);
bc_re_128 = simde_mm_madd_epi16(bc_re_128,after_mf_10_128[0]); //Re: I_b0*I_c0 - Q_b1*Q_c1
//bc_im_128 = simde_mm_shufflelo_epi16(after_mf_01_128[0], SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_b0 Q_b1 I_b2 Q_b3]_64bits to [Q_b1 I_b0 Q_b3 I_b2]_64bits
//bc_im_128 = simde_mm_shufflehi_epi16(bc_im_128, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_b0 Q_b1 I_b2 Q_b3]_64bits to [Q_b1 I_b0 Q_b3 I_b2]_64bits
//bc_im_128 = simde_mm_madd_epi16(bc_im_128,after_mf_10_128[0]);//Im: (Q_bI_c + I_bQ_c)
det_re_128 = simde_mm_sub_epi32(ad_re_128, bc_re_128);
//det_im_128 = simde_mm_sub_epi32(ad_im_128, bc_im_128);
//det in Q30 format
det_fin_128[0] = simde_mm_abs_epi32(det_re_128);
#ifdef DEBUG_DLSCH_DEMOD
printf("\n Computing det_HhH_inv \n");
//print_ints("det_re_128:",(int32_t*)&det_re_128);
//print_ints("det_im_128:",(int32_t*)&det_im_128);
print_ints("det_fin_128:",(int32_t*)&det_fin_128[0]);
#endif
det_fin_128+=1;
after_mf_00_128+=1;
after_mf_01_128+=1;
after_mf_10_128+=1;
after_mf_11_128+=1;
}
simde_mm_empty();
simde_m_empty();
}
/* Zero Forcing Rx function: nr_conjch0_mult_ch1()
*
*
* */
static void nr_ulsch_conjch0_mult_ch1(int *ch0,
int *ch1,
int32_t *ch0conj_ch1,
unsigned short nb_rb,
unsigned char output_shift0)
{
//This function is used to compute multiplications in H_hermitian * H matrix
short nr_conjugate[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1};
unsigned short rb;
simde__m128i *dl_ch0_128,*dl_ch1_128, *ch0conj_ch1_128, mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3;
dl_ch0_128 = (simde__m128i *)ch0;
dl_ch1_128 = (simde__m128i *)ch1;
ch0conj_ch1_128 = (simde__m128i *)ch0conj_ch1;
for (rb=0; rb<3*nb_rb; rb++) {
mmtmpD0 = simde_mm_madd_epi16(dl_ch0_128[0],dl_ch1_128[0]);
mmtmpD1 = simde_mm_shufflelo_epi16(dl_ch0_128[0], SIMDE_MM_SHUFFLE(2,3,0,1));
mmtmpD1 = simde_mm_shufflehi_epi16(mmtmpD1, SIMDE_MM_SHUFFLE(2,3,0,1));
mmtmpD1 = simde_mm_sign_epi16(mmtmpD1,*(simde__m128i*)&nr_conjugate[0]);
mmtmpD1 = simde_mm_madd_epi16(mmtmpD1,dl_ch1_128[0]);
mmtmpD0 = simde_mm_srai_epi32(mmtmpD0,output_shift0);
mmtmpD1 = simde_mm_srai_epi32(mmtmpD1,output_shift0);
mmtmpD2 = simde_mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
mmtmpD3 = simde_mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
ch0conj_ch1_128[0] = simde_mm_packs_epi32(mmtmpD2,mmtmpD3);
/*printf("\n Computing conjugates \n");
print_shorts("ch0:",(int16_t*)&dl_ch0_128[0]);
print_shorts("ch1:",(int16_t*)&dl_ch1_128[0]);
print_shorts("pack:",(int16_t*)&ch0conj_ch1_128[0]);*/
dl_ch0_128+=1;
dl_ch1_128+=1;
ch0conj_ch1_128+=1;
}
simde_mm_empty();
simde_m_empty();
}
static simde__m128i nr_ulsch_comp_muli_sum(simde__m128i input_x,
simde__m128i input_y,
simde__m128i input_w,
simde__m128i input_z,
simde__m128i det)
{
int16_t nr_conjug2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;
simde__m128i xy_re_128, xy_im_128, wz_re_128, wz_im_128;
simde__m128i output, tmp_z0, tmp_z1;
// complex multiplication (x_re + jx_im)*(y_re + jy_im) = (x_re*y_re - x_im*y_im) + j(x_im*y_re + x_re*y_im)
// the real part
xy_re_128 = simde_mm_sign_epi16(input_x,*(simde__m128i*)&nr_conjug2[0]);
xy_re_128 = simde_mm_madd_epi16(xy_re_128,input_y); //Re: (x_re*y_re - x_im*y_im)
// the imag part
xy_im_128 = simde_mm_shufflelo_epi16(input_x, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
xy_im_128 = simde_mm_shufflehi_epi16(xy_im_128, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
xy_im_128 = simde_mm_madd_epi16(xy_im_128,input_y);//Im: (x_im*y_re + x_re*y_im)
// complex multiplication (w_re + jw_im)*(z_re + jz_im) = (w_re*z_re - w_im*z_im) + j(w_im*z_re + w_re*z_im)
// the real part
wz_re_128 = simde_mm_sign_epi16(input_w,*(simde__m128i*)&nr_conjug2[0]);
wz_re_128 = simde_mm_madd_epi16(wz_re_128,input_z); //Re: (w_re*z_re - w_im*z_im)
// the imag part
wz_im_128 = simde_mm_shufflelo_epi16(input_w, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
wz_im_128 = simde_mm_shufflehi_epi16(wz_im_128, SIMDE_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
wz_im_128 = simde_mm_madd_epi16(wz_im_128,input_z);//Im: (w_im*z_re + w_re*z_im)
xy_re_128 = simde_mm_sub_epi32(xy_re_128, wz_re_128);
xy_im_128 = simde_mm_sub_epi32(xy_im_128, wz_im_128);
//print_ints("rx_re:",(int32_t*)&xy_re_128[0]);
//print_ints("rx_Img:",(int32_t*)&xy_im_128[0]);
//divide by matrix det and convert back to Q15 before packing
int sum_det =0;
for (int k=0; k<4;k++) {
sum_det += ((((int *)&det)[k])>>2);
//printf("det_%d = %d log2 =%d \n",k,(((int *)&det[0])[k]),log2_approx(((int *)&det[0])[k]));
}
int b = log2_approx(sum_det) - 8;
if (b > 0) {
xy_re_128 = simde_mm_srai_epi32(xy_re_128, b);
xy_im_128 = simde_mm_srai_epi32(xy_im_128, b);
} else {
xy_re_128 = simde_mm_slli_epi32(xy_re_128, -b);
xy_im_128 = simde_mm_slli_epi32(xy_im_128, -b);
}
tmp_z0 = simde_mm_unpacklo_epi32(xy_re_128,xy_im_128);
//print_ints("unpack lo:",&tmp_z0[0]);
tmp_z1 = simde_mm_unpackhi_epi32(xy_re_128,xy_im_128);
//print_ints("unpack hi:",&tmp_z1[0]);
output = simde_mm_packs_epi32(tmp_z0,tmp_z1);
simde_mm_empty();
simde_m_empty();
return(output);
}
/* Zero Forcing Rx function: nr_construct_HhH_elements()
*
*
* */
static void nr_ulsch_construct_HhH_elements(int *conjch00_ch00,
int *conjch01_ch01,
int *conjch11_ch11,
int *conjch10_ch10,//
int *conjch20_ch20,
int *conjch21_ch21,
int *conjch30_ch30,
int *conjch31_ch31,
int *conjch00_ch01,//00_01
int *conjch01_ch00,//01_00
int *conjch10_ch11,//10_11
int *conjch11_ch10,//11_10
int *conjch20_ch21,
int *conjch21_ch20,
int *conjch30_ch31,
int *conjch31_ch30,
int32_t *after_mf_00,
int32_t *after_mf_01,
int32_t *after_mf_10,
int32_t *after_mf_11,
unsigned short nb_rb,
unsigned char symbol)
{
//This function is used to construct the (H_hermitian * H matrix) matrix elements
unsigned short rb;
simde__m128i *conjch00_ch00_128, *conjch01_ch01_128, *conjch11_ch11_128, *conjch10_ch10_128;
simde__m128i *conjch20_ch20_128, *conjch21_ch21_128, *conjch30_ch30_128, *conjch31_ch31_128;
simde__m128i *conjch00_ch01_128, *conjch01_ch00_128, *conjch10_ch11_128, *conjch11_ch10_128;
simde__m128i *conjch20_ch21_128, *conjch21_ch20_128, *conjch30_ch31_128, *conjch31_ch30_128;
simde__m128i *after_mf_00_128, *after_mf_01_128, *after_mf_10_128, *after_mf_11_128;
conjch00_ch00_128 = (simde__m128i *)conjch00_ch00;
conjch01_ch01_128 = (simde__m128i *)conjch01_ch01;
conjch11_ch11_128 = (simde__m128i *)conjch11_ch11;
conjch10_ch10_128 = (simde__m128i *)conjch10_ch10;
conjch20_ch20_128 = (simde__m128i *)conjch20_ch20;
conjch21_ch21_128 = (simde__m128i *)conjch21_ch21;
conjch30_ch30_128 = (simde__m128i *)conjch30_ch30;
conjch31_ch31_128 = (simde__m128i *)conjch31_ch31;
conjch00_ch01_128 = (simde__m128i *)conjch00_ch01;
conjch01_ch00_128 = (simde__m128i *)conjch01_ch00;
conjch10_ch11_128 = (simde__m128i *)conjch10_ch11;
conjch11_ch10_128 = (simde__m128i *)conjch11_ch10;
conjch20_ch21_128 = (simde__m128i *)conjch20_ch21;
conjch21_ch20_128 = (simde__m128i *)conjch21_ch20;
conjch30_ch31_128 = (simde__m128i *)conjch30_ch31;
conjch31_ch30_128 = (simde__m128i *)conjch31_ch30;
after_mf_00_128 = (simde__m128i *)after_mf_00;
after_mf_01_128 = (simde__m128i *)after_mf_01;
after_mf_10_128 = (simde__m128i *)after_mf_10;
after_mf_11_128 = (simde__m128i *)after_mf_11;
for (rb=0; rb<3*nb_rb; rb++) {
after_mf_00_128[0] =simde_mm_adds_epi16(conjch00_ch00_128[0],conjch10_ch10_128[0]);//00_00 + 10_10
if (conjch20_ch20 != NULL) after_mf_00_128[0] =simde_mm_adds_epi16(after_mf_00_128[0],conjch20_ch20_128[0]);
if (conjch30_ch30 != NULL) after_mf_00_128[0] =simde_mm_adds_epi16(after_mf_00_128[0],conjch30_ch30_128[0]);
after_mf_11_128[0] =simde_mm_adds_epi16(conjch01_ch01_128[0], conjch11_ch11_128[0]); //01_01 + 11_11
if (conjch21_ch21 != NULL) after_mf_11_128[0] =simde_mm_adds_epi16(after_mf_11_128[0],conjch21_ch21_128[0]);
if (conjch31_ch31 != NULL) after_mf_11_128[0] =simde_mm_adds_epi16(after_mf_11_128[0],conjch31_ch31_128[0]);
after_mf_01_128[0] =simde_mm_adds_epi16(conjch00_ch01_128[0], conjch10_ch11_128[0]);//00_01 + 10_11
if (conjch20_ch21 != NULL) after_mf_01_128[0] =simde_mm_adds_epi16(after_mf_01_128[0],conjch20_ch21_128[0]);
if (conjch30_ch31 != NULL) after_mf_01_128[0] =simde_mm_adds_epi16(after_mf_01_128[0],conjch30_ch31_128[0]);
after_mf_10_128[0] =simde_mm_adds_epi16(conjch01_ch00_128[0], conjch11_ch10_128[0]);//01_00 + 11_10
if (conjch21_ch20 != NULL) after_mf_10_128[0] =simde_mm_adds_epi16(after_mf_10_128[0],conjch21_ch20_128[0]);
if (conjch31_ch30 != NULL) after_mf_10_128[0] =simde_mm_adds_epi16(after_mf_10_128[0],conjch31_ch30_128[0]);
#ifdef DEBUG_DLSCH_DEMOD
if ((rb<=30))
{
printf(" \n construct_HhH_elements \n");
print_shorts("after_mf_00_128:",(int16_t*)&after_mf_00_128[0]);
print_shorts("after_mf_01_128:",(int16_t*)&after_mf_01_128[0]);
print_shorts("after_mf_10_128:",(int16_t*)&after_mf_10_128[0]);
print_shorts("after_mf_11_128:",(int16_t*)&after_mf_11_128[0]);
}
#endif
conjch00_ch00_128+=1;
conjch10_ch10_128+=1;
conjch01_ch01_128+=1;
conjch11_ch11_128+=1;
if (conjch20_ch20 != NULL) conjch20_ch20_128+=1;
if (conjch21_ch21 != NULL) conjch21_ch21_128+=1;
if (conjch30_ch30 != NULL) conjch30_ch30_128+=1;
if (conjch31_ch31 != NULL) conjch31_ch31_128+=1;
conjch00_ch01_128+=1;
conjch01_ch00_128+=1;
conjch10_ch11_128+=1;
conjch11_ch10_128+=1;
if (conjch20_ch21 != NULL) conjch20_ch21_128+=1;
if (conjch21_ch20 != NULL) conjch21_ch20_128+=1;
if (conjch30_ch31 != NULL) conjch30_ch31_128+=1;
if (conjch31_ch30 != NULL) conjch31_ch30_128+=1;
after_mf_00_128 += 1;
after_mf_01_128 += 1;
after_mf_10_128 += 1;
after_mf_11_128 += 1;
}
simde_mm_empty();
simde_m_empty();
}
// MMSE Rx function: nr_ulsch_mmse_2layers()
static uint8_t nr_ulsch_mmse_2layers(NR_DL_FRAME_PARMS *frame_parms,
int **rxdataF_comp,
int **ul_ch_mag,
int **ul_ch_magb,
int **ul_ch_magc,
int **ul_ch_estimates_ext,
unsigned short nb_rb,
unsigned char n_rx,
unsigned char mod_order,
int shift,
unsigned char symbol,
int length,
uint32_t noise_var,
uint32_t buffer_length)
{
int *ch00, *ch01, *ch10, *ch11;
int *ch20, *ch30, *ch21, *ch31;
uint32_t nb_rb_0 = length/12 + ((length%12)?1:0);
/* we need at least alignment to 16 bytes, let's put 32 to be sure
* (maybe not necessary but doesn't hurt)
*/
int32_t conjch00_ch01[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch01_ch00[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch10_ch11[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch11_ch10[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch00_ch00[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch01_ch01[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch10_ch10[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch11_ch11[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch20_ch20[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch21_ch21[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch30_ch30[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch31_ch31[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch20_ch21[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch30_ch31[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch21_ch20[12*nb_rb] __attribute__((aligned(32)));
int32_t conjch31_ch30[12*nb_rb] __attribute__((aligned(32)));
int32_t af_mf_00[12*nb_rb] __attribute__((aligned(32)));
int32_t af_mf_01[12*nb_rb] __attribute__((aligned(32)));
int32_t af_mf_10[12*nb_rb] __attribute__((aligned(32)));
int32_t af_mf_11[12*nb_rb] __attribute__((aligned(32)));
int32_t determ_fin[12*nb_rb] __attribute__((aligned(32)));
switch (n_rx) {
case 2://
ch00 = &((int *)ul_ch_estimates_ext)[0 * buffer_length];
ch01 = &((int *)ul_ch_estimates_ext)[2 * buffer_length];
ch10 = &((int *)ul_ch_estimates_ext)[1 * buffer_length];
ch11 = &((int *)ul_ch_estimates_ext)[3 * buffer_length];
ch20 = NULL;
ch21 = NULL;
ch30 = NULL;
ch31 = NULL;
break;
case 4://
ch00 = &((int *)ul_ch_estimates_ext)[0 * buffer_length];
ch01 = &((int *)ul_ch_estimates_ext)[4 * buffer_length];
ch10 = &((int *)ul_ch_estimates_ext)[1 * buffer_length];
ch11 = &((int *)ul_ch_estimates_ext)[5 * buffer_length];
ch20 = &((int *)ul_ch_estimates_ext)[2 * buffer_length];
ch21 = &((int *)ul_ch_estimates_ext)[6 * buffer_length];
ch30 = &((int *)ul_ch_estimates_ext)[3 * buffer_length];
ch31 = &((int *)ul_ch_estimates_ext)[7 * buffer_length];
break;
default:
return -1;
break;
}
/* 1- Compute the rx channel matrix after compensation: (1/2^log2_max)x(H_herm x H)
* for n_rx = 2
* |conj_H_00 conj_H_10| | H_00 H_01| |(conj_H_00xH_00+conj_H_10xH_10) (conj_H_00xH_01+conj_H_10xH_11)|
* | | x | | = | |
* |conj_H_01 conj_H_11| | H_10 H_11| |(conj_H_01xH_00+conj_H_11xH_10) (conj_H_01xH_01+conj_H_11xH_11)|
*
*/
if (n_rx>=2){
// (1/2^log2_maxh)*conj_H_00xH_00: (1/(64*2))conjH_00*H_00*2^15
nr_ulsch_conjch0_mult_ch1(ch00,
ch00,
conjch00_ch00,
nb_rb_0,
shift);
// (1/2^log2_maxh)*conj_H_10xH_10: (1/(64*2))conjH_10*H_10*2^15
nr_ulsch_conjch0_mult_ch1(ch10,
ch10,
conjch10_ch10,
nb_rb_0,
shift);
// conj_H_00xH_01
nr_ulsch_conjch0_mult_ch1(ch00,
ch01,
conjch00_ch01,
nb_rb_0,
shift); // this shift is equal to the channel level log2_maxh
// conj_H_10xH_11
nr_ulsch_conjch0_mult_ch1(ch10,
ch11,
conjch10_ch11,
nb_rb_0,
shift);
// conj_H_01xH_01
nr_ulsch_conjch0_mult_ch1(ch01,
ch01,
conjch01_ch01,
nb_rb_0,
shift);
// conj_H_11xH_11
nr_ulsch_conjch0_mult_ch1(ch11,
ch11,
conjch11_ch11,
nb_rb_0,
shift);
// conj_H_01xH_00
nr_ulsch_conjch0_mult_ch1(ch01,
ch00,
conjch01_ch00,
nb_rb_0,
shift);
// conj_H_11xH_10
nr_ulsch_conjch0_mult_ch1(ch11,
ch10,
conjch11_ch10,
nb_rb_0,
shift);
}
if (n_rx==4){
// (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2*16))conjH_20*H_20*2^15
nr_ulsch_conjch0_mult_ch1(ch20,
ch20,
conjch20_ch20,
nb_rb_0,
shift);
// (1/2^log2_maxh)*conj_H_30xH_30: (1/(64*2*4))conjH_30*H_30*2^15
nr_ulsch_conjch0_mult_ch1(ch30,
ch30,
conjch30_ch30,
nb_rb_0,
shift);
// (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2))conjH_20*H_20*2^15
nr_ulsch_conjch0_mult_ch1(ch20,
ch21,
conjch20_ch21,
nb_rb_0,
shift);
nr_ulsch_conjch0_mult_ch1(ch30,
ch31,
conjch30_ch31,
nb_rb_0,
shift);
nr_ulsch_conjch0_mult_ch1(ch21,
ch21,
conjch21_ch21,
nb_rb_0,
shift);
nr_ulsch_conjch0_mult_ch1(ch31,
ch31,
conjch31_ch31,
nb_rb_0,
shift);
// (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2))conjH_20*H_20*2^15
nr_ulsch_conjch0_mult_ch1(ch21,
ch20,
conjch21_ch20,
nb_rb_0,
shift);
nr_ulsch_conjch0_mult_ch1(ch31,
ch30,
conjch31_ch30,
nb_rb_0,
shift);
nr_ulsch_construct_HhH_elements(conjch00_ch00,
conjch01_ch01,
conjch11_ch11,
conjch10_ch10,//
conjch20_ch20,
conjch21_ch21,
conjch30_ch30,
conjch31_ch31,
conjch00_ch01,
conjch01_ch00,
conjch10_ch11,
conjch11_ch10,//
conjch20_ch21,
conjch21_ch20,
conjch30_ch31,
conjch31_ch30,
af_mf_00,
af_mf_01,
af_mf_10,
af_mf_11,
nb_rb_0,
symbol);
}
if (n_rx==2){
nr_ulsch_construct_HhH_elements(conjch00_ch00,
conjch01_ch01,
conjch11_ch11,
conjch10_ch10,//
NULL,
NULL,
NULL,
NULL,
conjch00_ch01,
conjch01_ch00,
conjch10_ch11,
conjch11_ch10,//
NULL,
NULL,
NULL,
NULL,
af_mf_00,
af_mf_01,
af_mf_10,
af_mf_11,
nb_rb_0,
symbol);
}
// Add noise_var such that: H^h * H + noise_var * I
if (noise_var != 0) {
simde__m128i nvar_128i = simde_mm_set1_epi32(noise_var);
simde__m128i *af_mf_00_128i = (simde__m128i *)af_mf_00;
simde__m128i *af_mf_11_128i = (simde__m128i *)af_mf_11;
for (int k = 0; k < 3 * nb_rb_0; k++) {
af_mf_00_128i[0] = simde_mm_add_epi32(af_mf_00_128i[0], nvar_128i);
af_mf_11_128i[0] = simde_mm_add_epi32(af_mf_11_128i[0], nvar_128i);
af_mf_00_128i++;
af_mf_11_128i++;
}
}
//det_HhH = ad -bc
nr_ulsch_det_HhH(af_mf_00,//a
af_mf_01,//b
af_mf_10,//c
af_mf_11,//d
determ_fin,
nb_rb_0,
symbol,
shift);
/* 2- Compute the channel matrix inversion **********************************
*
* |(conj_H_00xH_00+conj_H_10xH_10) (conj_H_00xH_01+conj_H_10xH_11)|
* A= | |
* |(conj_H_01xH_00+conj_H_11xH_10) (conj_H_01xH_01+conj_H_11xH_11)|
*
*
*
*inv(A) =(1/det)*[d -b
* -c a]
*
*
**************************************************************************/
simde__m128i *ul_ch_mag128_0 = NULL, *ul_ch_mag128b_0 = NULL, *ul_ch_mag128c_0 = NULL; // Layer 0
simde__m128i *ul_ch_mag128_1 = NULL, *ul_ch_mag128b_1 = NULL, *ul_ch_mag128c_1 = NULL; // Layer 1
simde__m128i mmtmpD0, mmtmpD1, mmtmpD2, mmtmpD3;
simde__m128i QAM_amp128 = {0}, QAM_amp128b = {0}, QAM_amp128c = {0};
simde__m128i *determ_fin_128 = (simde__m128i *)&determ_fin[0];
simde__m128i *after_mf_a_128 = (simde__m128i *)af_mf_00;
simde__m128i *after_mf_b_128 = (simde__m128i *)af_mf_01;
simde__m128i *after_mf_c_128 = (simde__m128i *)af_mf_10;
simde__m128i *after_mf_d_128 = (simde__m128i *)af_mf_11;
simde__m128i *rxdataF_comp128_0 = (simde__m128i *)&rxdataF_comp[0][symbol * buffer_length];
simde__m128i *rxdataF_comp128_1 = (simde__m128i *)&rxdataF_comp[n_rx][symbol * buffer_length];
if (mod_order > 2) {
if (mod_order == 4) {
QAM_amp128 = simde_mm_set1_epi16(QAM16_n1); // 2/sqrt(10)
QAM_amp128b = simde_mm_setzero_si128();
QAM_amp128c = simde_mm_setzero_si128();
} else if (mod_order == 6) {
QAM_amp128 = simde_mm_set1_epi16(QAM64_n1); // 4/sqrt{42}
QAM_amp128b = simde_mm_set1_epi16(QAM64_n2); // 2/sqrt{42}
QAM_amp128c = simde_mm_setzero_si128();
} else if (mod_order == 8) {
QAM_amp128 = simde_mm_set1_epi16(QAM256_n1);
QAM_amp128b = simde_mm_set1_epi16(QAM256_n2);
QAM_amp128c = simde_mm_set1_epi16(QAM256_n3);
}
ul_ch_mag128_0 = (simde__m128i *) &ul_ch_mag[0];
ul_ch_mag128b_0 = (simde__m128i *)&ul_ch_magb[0];
ul_ch_mag128c_0 = (simde__m128i *)&ul_ch_magc[0];
ul_ch_mag128_1 = (simde__m128i *) &((int *)ul_ch_mag)[1 * buffer_length];
ul_ch_mag128b_1 = (simde__m128i *)&((int *)ul_ch_magb)[1 * buffer_length];
ul_ch_mag128c_1 = (simde__m128i *)&((int *)ul_ch_magc)[1 * buffer_length];
}
for (int rb = 0; rb < 3 * nb_rb_0; rb++) {
// Magnitude computation
if (mod_order > 2) {
int sum_det = 0;
for (int k = 0; k < 4; k++) {
AssertFatal(((int *)&determ_fin_128[0])[k] > 0 ,"Right shifting negative values is UB" );
sum_det += ((((uint32_t *)&determ_fin_128[0])[k]) >> 2);
}
int b = log2_approx(sum_det) - 8;
if (b > 0) {
mmtmpD2 = simde_mm_srai_epi32(determ_fin_128[0], b);
} else {
mmtmpD2 = simde_mm_slli_epi32(determ_fin_128[0], -b);
}
mmtmpD3 = simde_mm_unpacklo_epi32(mmtmpD2, mmtmpD2);
mmtmpD2 = simde_mm_unpackhi_epi32(mmtmpD2, mmtmpD2);
mmtmpD2 = simde_mm_packs_epi32(mmtmpD3, mmtmpD2);
// Layer 0
ul_ch_mag128_0[0] = mmtmpD2;
ul_ch_mag128b_0[0] = mmtmpD2;
ul_ch_mag128c_0[0] = mmtmpD2;
ul_ch_mag128_0[0] = simde_mm_mulhi_epi16(ul_ch_mag128_0[0], QAM_amp128);
ul_ch_mag128_0[0] = simde_mm_slli_epi16(ul_ch_mag128_0[0], 1);
ul_ch_mag128b_0[0] = simde_mm_mulhi_epi16(ul_ch_mag128b_0[0], QAM_amp128b);
ul_ch_mag128b_0[0] = simde_mm_slli_epi16(ul_ch_mag128b_0[0], 1);
ul_ch_mag128c_0[0] = simde_mm_mulhi_epi16(ul_ch_mag128c_0[0], QAM_amp128c);
ul_ch_mag128c_0[0] = simde_mm_slli_epi16(ul_ch_mag128c_0[0], 1);
// Layer 1
ul_ch_mag128_1[0] = mmtmpD2;
ul_ch_mag128b_1[0] = mmtmpD2;
ul_ch_mag128c_1[0] = mmtmpD2;
ul_ch_mag128_1[0] = simde_mm_mulhi_epi16(ul_ch_mag128_1[0], QAM_amp128);
ul_ch_mag128_1[0] = simde_mm_slli_epi16(ul_ch_mag128_1[0], 1);
ul_ch_mag128b_1[0] = simde_mm_mulhi_epi16(ul_ch_mag128b_1[0], QAM_amp128b);
ul_ch_mag128b_1[0] = simde_mm_slli_epi16(ul_ch_mag128b_1[0], 1);
ul_ch_mag128c_1[0] = simde_mm_mulhi_epi16(ul_ch_mag128c_1[0], QAM_amp128c);
ul_ch_mag128c_1[0] = simde_mm_slli_epi16(ul_ch_mag128c_1[0], 1);
}
// multiply by channel Inv
//rxdataF_zf128_0 = rxdataF_comp128_0*d - b*rxdataF_comp128_1
//rxdataF_zf128_1 = rxdataF_comp128_1*a - c*rxdataF_comp128_0
//printf("layer_1 \n");
mmtmpD0 = nr_ulsch_comp_muli_sum(rxdataF_comp128_0[0],
after_mf_d_128[0],
rxdataF_comp128_1[0],
after_mf_b_128[0],
determ_fin_128[0]);
//printf("layer_2 \n");
mmtmpD1 = nr_ulsch_comp_muli_sum(rxdataF_comp128_1[0],
after_mf_a_128[0],
rxdataF_comp128_0[0],
after_mf_c_128[0],
determ_fin_128[0]);
rxdataF_comp128_0[0] = mmtmpD0;
rxdataF_comp128_1[0] = mmtmpD1;
#ifdef DEBUG_DLSCH_DEMOD
printf("\n Rx signal after ZF l%d rb%d\n",symbol,rb);
print_shorts(" Rx layer 1:",(int16_t*)&rxdataF_comp128_0[0]);
print_shorts(" Rx layer 2:",(int16_t*)&rxdataF_comp128_1[0]);
#endif
determ_fin_128 += 1;
ul_ch_mag128_0 += 1;
ul_ch_mag128_1 += 1;
ul_ch_mag128b_0 += 1;
ul_ch_mag128b_1 += 1;
ul_ch_mag128c_0 += 1;
ul_ch_mag128c_1 += 1;
rxdataF_comp128_0 += 1;
rxdataF_comp128_1 += 1;
after_mf_a_128 += 1;
after_mf_b_128 += 1;
after_mf_c_128 += 1;
after_mf_d_128 += 1;
}
simde_mm_empty();
simde_m_empty();
return(0);
}
static void inner_rx(PHY_VARS_gNB *gNB,
int ulsch_id,
int slot,
NR_DL_FRAME_PARMS *frame_parms,
NR_gNB_PUSCH *pusch_vars,
nfapi_nr_pusch_pdu_t *rel15_ul,
c16_t **rxF,
c16_t **ul_ch,
int16_t **llr,
int soffset,
int length,
int symbol,
int output_shift,
uint32_t nvar)
{
int nb_layer = rel15_ul->nrOfLayers;
int nb_rx_ant = frame_parms->nb_antennas_rx;
int dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
int buffer_length = (rel15_ul->rb_size * NR_NB_SC_PER_RB + 15) & ~15;
c16_t rxFext[nb_rx_ant][buffer_length] __attribute__((aligned(32)));
c16_t chFext[nb_layer][nb_rx_ant][buffer_length] __attribute__((aligned(32)));
memset(rxFext, 0, sizeof(c16_t) * nb_rx_ant * buffer_length);
memset(chFext, 0, sizeof(c16_t) * nb_layer * nb_rx_ant* buffer_length);
for (int aarx = 0; aarx < nb_rx_ant; aarx++) {
for (int aatx = 0; aatx < nb_layer; aatx++) {
nr_ulsch_extract_rbs(rxF[aarx],
(c16_t *)pusch_vars->ul_ch_estimates[aatx * nb_rx_ant + aarx],
rxFext[aarx],
chFext[aatx][aarx],
soffset+(symbol * frame_parms->ofdm_symbol_size),
pusch_vars->dmrs_symbol * frame_parms->ofdm_symbol_size,
aarx,
dmrs_symbol_flag,
rel15_ul,
frame_parms);
}
}
c16_t rho[nb_layer][nb_layer][buffer_length] __attribute__((aligned(32)));
c16_t rxF_ch_maga [nb_layer][buffer_length] __attribute__((aligned(32)));
c16_t rxF_ch_magb [nb_layer][buffer_length] __attribute__((aligned(32)));
c16_t rxF_ch_magc [nb_layer][buffer_length] __attribute__((aligned(32)));
memset(rho, 0, sizeof(c16_t) * nb_layer * nb_layer* buffer_length);
memset(rxF_ch_maga, 0, sizeof(c16_t) * nb_layer * buffer_length);
memset(rxF_ch_magb, 0, sizeof(c16_t) * nb_layer * buffer_length);
memset(rxF_ch_magc, 0, sizeof(c16_t) * nb_layer * buffer_length);
for (int i = 0; i < nb_layer; i++)
memset(&pusch_vars->rxdataF_comp[i*nb_rx_ant][symbol * buffer_length], 0, sizeof(int32_t) * buffer_length);
nr_ulsch_channel_compensation((c16_t*)rxFext,
(c16_t*)chFext,
(c16_t*)rxF_ch_maga,
(c16_t*)rxF_ch_magb,
(c16_t*)rxF_ch_magc,
pusch_vars->rxdataF_comp,
(nb_layer == 1) ? NULL : (c16_t*)rho,
frame_parms,
rel15_ul,
symbol,
buffer_length,
output_shift);
if (nb_layer == 1 && rel15_ul->transform_precoding == transformPrecoder_enabled && rel15_ul->qam_mod_order <= 6) {
if (rel15_ul->qam_mod_order > 2)
nr_freq_equalization(frame_parms,
&pusch_vars->rxdataF_comp[0][symbol * buffer_length],
(int *)rxF_ch_maga,
(int *)rxF_ch_magb,
symbol,
pusch_vars->ul_valid_re_per_slot[symbol],
rel15_ul->qam_mod_order);
nr_idft(&pusch_vars->rxdataF_comp[0][symbol * buffer_length], pusch_vars->ul_valid_re_per_slot[symbol]);
}
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
nr_pusch_ptrs_processing(gNB,
frame_parms,
rel15_ul,
ulsch_id,
slot,
symbol,
buffer_length);
pusch_vars->ul_valid_re_per_slot[symbol] -= pusch_vars->ptrs_re_per_slot;
}
if (nb_layer == 2) {
if (rel15_ul->qam_mod_order < 6) {
nr_ulsch_compute_ML_llr(pusch_vars,
symbol,
(c16_t*)&pusch_vars->rxdataF_comp[0][symbol * buffer_length],
(c16_t*)&pusch_vars->rxdataF_comp[nb_rx_ant][symbol * buffer_length],
rxF_ch_maga[0],
rxF_ch_maga[1],
(c16_t*)&llr[0][pusch_vars->llr_offset[symbol]],
(c16_t*)&llr[1][pusch_vars->llr_offset[symbol]],
rho[0][1],
rho[1][0],
pusch_vars->ul_valid_re_per_slot[symbol],
rel15_ul->qam_mod_order);
}
else {
nr_ulsch_mmse_2layers(frame_parms,
(int32_t **)pusch_vars->rxdataF_comp,
(int **)rxF_ch_maga,
(int **)rxF_ch_magb,
(int **)rxF_ch_magc,
(int **)chFext,
rel15_ul->rb_size,
frame_parms->nb_antennas_rx,
rel15_ul->qam_mod_order,
pusch_vars->log2_maxh,
symbol,
pusch_vars->ul_valid_re_per_slot[symbol],
nvar,
buffer_length);
}
}
if (nb_layer != 2 || rel15_ul->qam_mod_order >= 6)
for (int aatx = 0; aatx < nb_layer; aatx++)
nr_ulsch_compute_llr((int32_t*)&pusch_vars->rxdataF_comp[aatx * nb_rx_ant][symbol * buffer_length],
(int32_t*)rxF_ch_maga[aatx],
(int32_t*)rxF_ch_magb[aatx],
(int32_t*)rxF_ch_magc[aatx],
&llr[aatx][pusch_vars->llr_offset[symbol]],
pusch_vars->ul_valid_re_per_slot[symbol],
symbol,
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;
PHY_VARS_gNB *gNB = rdata->gNB;
NR_DL_FRAME_PARMS *frame_parms = rdata->frame_parms;
nfapi_nr_pusch_pdu_t *rel15_ul = rdata->rel15_ul;
int ulsch_id = rdata->ulsch_id;
int slot = rdata->slot;
NR_gNB_PUSCH *pusch_vars = &gNB->pusch_vars[ulsch_id];
for (int symbol = rdata->startSymbol; symbol < rdata->startSymbol+rdata->numSymbols; symbol++) {
int dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
if (dmrs_symbol_flag == 1)
{
if ((rel15_ul->ul_dmrs_symb_pos >> ((symbol + 1) % frame_parms->symbols_per_slot)) & 0x01)
AssertFatal(1==0,"Double DMRS configuration is not yet supported\n");
gNB->pusch_vars[ulsch_id].dmrs_symbol = symbol;
}
if (gNB->pusch_vars[ulsch_id].ul_valid_re_per_slot[symbol] == 0)
continue;
int soffset = (slot % RU_RX_SLOT_DEPTH) * frame_parms->symbols_per_slot * frame_parms->ofdm_symbol_size;
inner_rx(gNB,
ulsch_id,
slot,
frame_parms,
pusch_vars,
rel15_ul,
gNB->common_vars.rxdataF,
(c16_t**)gNB->pusch_vars[ulsch_id].ul_ch_estimates,
rdata->llr_layers,
soffset,
gNB->pusch_vars[ulsch_id].ul_valid_re_per_slot[symbol],
symbol,
gNB->pusch_vars[ulsch_id].log2_maxh,
rdata->nvar);
int nb_re_pusch = gNB->pusch_vars[ulsch_id].ul_valid_re_per_slot[symbol];
// layer de-mapping
int16_t* llr_ptr = &rdata->llr_layers[0][pusch_vars->llr_offset[symbol]];
if (rel15_ul->nrOfLayers != 1) {
llr_ptr = &rdata->llr[pusch_vars->llr_offset[symbol] * rel15_ul->nrOfLayers];
for (int i = 0; i < (nb_re_pusch); i++)
for (int l = 0; l < rel15_ul->nrOfLayers; l++)
for (int m = 0; m < rel15_ul->qam_mod_order; m++)
llr_ptr[i*rel15_ul->nrOfLayers*rel15_ul->qam_mod_order+l*rel15_ul->qam_mod_order+m] = rdata->llr_layers[l][pusch_vars->llr_offset[symbol] + i*rel15_ul->qam_mod_order+m];
}
// unscrambling
int16_t *llr16 = (int16_t*)&rdata->llr[pusch_vars->llr_offset[symbol] * rel15_ul->nrOfLayers];
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];
}
}
int nr_rx_pusch_tp(PHY_VARS_gNB *gNB,
uint8_t ulsch_id,
uint32_t frame,
uint8_t slot,
unsigned char harq_pid)
{
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
nfapi_nr_pusch_pdu_t *rel15_ul = &gNB->ulsch[ulsch_id].harq_process->ulsch_pdu;
NR_gNB_PUSCH *pusch_vars = &gNB->pusch_vars[ulsch_id];
pusch_vars->dmrs_symbol = INVALID_VALUE;
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);
//----------------------------------------------------------
//------------------- Channel estimation -------------------
//----------------------------------------------------------
start_meas(&gNB->ulsch_channel_estimation_stats);
int max_ch = 0;
uint32_t nvar = 0;
for(uint8_t symbol = rel15_ul->start_symbol_index; symbol < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols); symbol++) {
uint8_t dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
LOG_D(PHY, "symbol %d, dmrs_symbol_flag :%d\n", symbol, dmrs_symbol_flag);
if (dmrs_symbol_flag == 1) {
if (pusch_vars->dmrs_symbol == INVALID_VALUE)
pusch_vars->dmrs_symbol = symbol;
for (int nl = 0; nl < rel15_ul->nrOfLayers; nl++) {
uint32_t nvar_tmp = 0;
nr_pusch_channel_estimation(gNB,
slot,
nl,
get_dmrs_port(nl, rel15_ul->dmrs_ports),
symbol,
ulsch_id,
bwp_start_subcarrier,
rel15_ul,
&max_ch,
&nvar_tmp);
nvar += nvar_tmp;
}
// measure the SNR from the channel estimation
nr_gnb_measurements(gNB,
&gNB->ulsch[ulsch_id],
pusch_vars,
symbol,
rel15_ul->nrOfLayers);
allocCast2D(n0_subband_power,
unsigned int,
gNB->measurements.n0_subband_power,
frame_parms->nb_antennas_rx,
frame_parms->N_RB_UL,
false);
for (int aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
if (symbol == rel15_ul->start_symbol_index) {
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(
&pusch_vars->ul_ch_estimates[aatx * gNB->frame_parms.nb_antennas_rx + aarx][symbol * frame_parms->ofdm_symbol_size],
rel15_ul->rb_size * 12);
}
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;
}
}
}
nvar /= (rel15_ul->nr_of_symbols * rel15_ul->nrOfLayers * frame_parms->nb_antennas_rx);
// averaging time domain channel estimates
if (gNB->chest_time == 1)
{
nr_chest_time_domain_avg(frame_parms,
pusch_vars->ul_ch_estimates,
rel15_ul->nr_of_symbols,
rel15_ul->start_symbol_index,
rel15_ul->ul_dmrs_symb_pos,
rel15_ul->rb_size);
pusch_vars->dmrs_symbol = get_next_dmrs_symbol_in_slot(rel15_ul->ul_dmrs_symb_pos,
rel15_ul->start_symbol_index,
rel15_ul->nr_of_symbols);
}
stop_meas(&gNB->ulsch_channel_estimation_stats);
start_meas(&gNB->rx_pusch_init_stats);
// Scrambling initialization
int number_dmrs_symbols = 0;
for (int l = rel15_ul->start_symbol_index; l < rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols; l++)
number_dmrs_symbols += ((rel15_ul->ul_dmrs_symb_pos)>>l) & 0x01;
int nb_re_dmrs;
if (rel15_ul->dmrs_config_type == pusch_dmrs_type1)
nb_re_dmrs = 6*rel15_ul->num_dmrs_cdm_grps_no_data;
else
nb_re_dmrs = 4*rel15_ul->num_dmrs_cdm_grps_no_data;
uint32_t unav_res = 0;
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
uint16_t ptrsSymbPos = 0;
set_ptrs_symb_idx(&ptrsSymbPos,
rel15_ul->nr_of_symbols,
rel15_ul->start_symbol_index,
1 << rel15_ul->pusch_ptrs.ptrs_time_density,
rel15_ul->ul_dmrs_symb_pos);
int ptrsSymbPerSlot = get_ptrs_symbols_in_slot(ptrsSymbPos, rel15_ul->start_symbol_index, rel15_ul->nr_of_symbols);
int n_ptrs = (rel15_ul->rb_size + rel15_ul->pusch_ptrs.ptrs_freq_density - 1) / rel15_ul->pusch_ptrs.ptrs_freq_density;
unav_res = n_ptrs * ptrsSymbPerSlot;
}
// get how many bit in a slot //
int G = nr_get_G(rel15_ul->rb_size,
rel15_ul->nr_of_symbols,
nb_re_dmrs,
number_dmrs_symbols, // number of dmrs symbols irrespective of single or double symbol dmrs
unav_res,
rel15_ul->qam_mod_order,
rel15_ul->nrOfLayers);
gNB->ulsch[ulsch_id].unav_res = unav_res;
// initialize scrambling sequence //
int16_t scramblingSequence[G + 96] __attribute__((aligned(32)));
nr_codeword_unscrambling_init(scramblingSequence, G, 0, rel15_ul->data_scrambling_id, rel15_ul->rnti);
// first the computation of channel levels
int nb_re_pusch = 0, meas_symbol = -1;
for(meas_symbol = rel15_ul->start_symbol_index;
meas_symbol < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);
meas_symbol++)
if ((nb_re_pusch = get_nb_re_pusch(frame_parms,rel15_ul,meas_symbol)) > 0)
break;
AssertFatal(nb_re_pusch>0 && meas_symbol>=0,"nb_re_pusch %d cannot be 0 or meas_symbol %d cannot be negative here\n",nb_re_pusch,meas_symbol);
// extract the first dmrs for the channel level computation
// extract the data in the OFDM frame, to the start of the array
int soffset = (slot % RU_RX_SLOT_DEPTH) * frame_parms->symbols_per_slot * frame_parms->ofdm_symbol_size;
nb_re_pusch = (nb_re_pusch + 15) & ~15;
for (int aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++)
for (int aatx = 0; aatx < rel15_ul->nrOfLayers; aatx++)
nr_ulsch_extract_rbs(gNB->common_vars.rxdataF[aarx],
(c16_t *)pusch_vars->ul_ch_estimates[aatx * frame_parms->nb_antennas_rx + aarx],
(c16_t*)&pusch_vars->rxdataF_ext[aarx][meas_symbol * nb_re_pusch],
(c16_t*)&pusch_vars->ul_ch_estimates_ext[aatx*frame_parms->nb_antennas_rx+aarx][meas_symbol * nb_re_pusch],
soffset + meas_symbol * frame_parms->ofdm_symbol_size,
pusch_vars->dmrs_symbol * frame_parms->ofdm_symbol_size,
aarx,
(rel15_ul->ul_dmrs_symb_pos >> meas_symbol) & 0x01,
rel15_ul,
frame_parms);
int avgs = 0;
int avg[frame_parms->nb_antennas_rx*rel15_ul->nrOfLayers];
uint8_t shift_ch_ext = rel15_ul->nrOfLayers > 1 ? log2_approx(max_ch >> 11) : 0;
//----------------------------------------------------------
//--------------------- Channel Scaling --------------------
//----------------------------------------------------------
nr_ulsch_scale_channel(pusch_vars->ul_ch_estimates_ext,
frame_parms,
meas_symbol,
(rel15_ul->ul_dmrs_symb_pos >> meas_symbol) & 0x01,
nb_re_pusch,
rel15_ul->nrOfLayers,
rel15_ul->rb_size,
shift_ch_ext);
nr_ulsch_channel_level(pusch_vars->ul_ch_estimates_ext,
frame_parms,
avg,
meas_symbol, // index of the start symbol
nb_re_pusch, // number of the re in pusch
rel15_ul->nrOfLayers);
for (int aatx = 0; aatx < rel15_ul->nrOfLayers; aatx++)
for (int aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++)
avgs = cmax(avgs, avg[aatx*frame_parms->nb_antennas_rx+aarx]);
pusch_vars->log2_maxh = (log2_approx(avgs) >> 1);
if (rel15_ul->nrOfLayers == 2 && rel15_ul->qam_mod_order >= 6)
pusch_vars->log2_maxh = (log2_approx(avgs) >> 1) - 3; // for MMSE
else if (rel15_ul->nrOfLayers == 1)
pusch_vars->log2_maxh = (log2_approx(avgs) >> 1) + 1 + log2_approx(frame_parms->nb_antennas_rx >> 2);
if (pusch_vars->log2_maxh < 0)
pusch_vars->log2_maxh = 0;
stop_meas(&gNB->rx_pusch_init_stats);
start_meas(&gNB->rx_pusch_symbol_processing_stats);
int numSymbols = gNB->num_pusch_symbols_per_thread;
for(uint8_t symbol = rel15_ul->start_symbol_index;
symbol < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);
symbol += numSymbols)
{
int total_res = 0;
for (int s = 0; s < numSymbols;s++) {
pusch_vars->ul_valid_re_per_slot[symbol+s] = get_nb_re_pusch(frame_parms,rel15_ul,symbol+s);
pusch_vars->llr_offset[symbol+s] = ((symbol+s) == rel15_ul->start_symbol_index) ?
0 :
pusch_vars->llr_offset[symbol+s-1] + pusch_vars->ul_valid_re_per_slot[symbol+s-1] * rel15_ul->qam_mod_order;
total_res+=pusch_vars->ul_valid_re_per_slot[symbol+s];
}
if (total_res > 0) {
union puschSymbolReqUnion id = {.s={ulsch_id,frame,slot,0}};
id.p=1+symbol;
notifiedFIFO_elt_t *req = newNotifiedFIFO_elt(sizeof(puschSymbolProc_t), id.p, &gNB->respPuschSymb, &nr_pusch_symbol_processing); // create a job for Tpool
puschSymbolProc_t *rdata = (puschSymbolProc_t*)NotifiedFifoData(req); // data for the job
rdata->gNB = gNB;
rdata->frame_parms = frame_parms;
rdata->rel15_ul = rel15_ul;
rdata->slot = slot;
rdata->startSymbol = symbol;
rdata->numSymbols = numSymbols;
rdata->ulsch_id = ulsch_id;
rdata->llr = pusch_vars->llr;
rdata->llr_layers = pusch_vars->llr_layers;
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);
nbSymb++;
}
LOG_D(PHY, "%d.%d Added symbol %d (count %d) to process, in pipe\n", frame, slot, symbol, nbSymb);
}
} // symbol loop
while (nbSymb) {
notifiedFIFO_elt_t *req = pullTpool(&gNB->respPuschSymb, &gNB->threadPool);
nbSymb--;
delNotifiedFIFO_elt(req);
}
stop_meas(&gNB->rx_pusch_symbol_processing_stats);
return 0;
}
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