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Smoothing the frequency response

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This commit is contained in:
Sakthivel Velumani
2021-05-10 00:09:18 +02:00
parent 2a6442096c
commit 7948949604
4 changed files with 572 additions and 29 deletions
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openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+270 -15
View File
@@ -518,9 +518,72 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
}
else if (pusch_pdu->dmrs_config_type == pusch_dmrs_type1) {// this is case without frequency-domain linear interpolation, just take average of LS channel estimates of 6 DMRS REs and use a common value for the whole PRB
int32_t ch_0, ch_1;
// First PRB
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
for (pilot_cnt=0; pilot_cnt<6*nb_rb_pusch; pilot_cnt += 6) {
int32_t ch_0, ch_1;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
multadd_real_vector_complex_scalar(filt8_avlip0,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip1,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip2,
ch,
ul_ch,
8);
ul_ch -= 24;
for (pilot_cnt=6; pilot_cnt<6*(nb_rb_pusch-1); pilot_cnt += 6) {
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
@@ -566,51 +629,243 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
((__m128i*)ul_ch)[0]=_mm_set1_epi32(*(int32_t*)ch);
((__m128i*)ul_ch)[1]=((__m128i*)ul_ch)[0];
((__m128i*)ul_ch)[2]=((__m128i*)ul_ch)[0];
ul_ch += 24;
ul_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
ul_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
ul_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip4,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip5,
ch,
ul_ch,
8);
ul_ch -= 16;
}
// Last PRB
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
ul_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
ul_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
ul_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip6,
ch,
ul_ch,
8);
}
else { // this is case without frequency-domain linear interpolation, just take average of LS channel estimates of 4 DMRS REs and use a common value for the whole PRB
int32_t ch_0, ch_1;
//First PRB
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
multadd_real_vector_complex_scalar(filt8_avlip0,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip1,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip2,
ch,
ul_ch,
8);
ul_ch -= 24;
for (pilot_cnt=0; pilot_cnt<4*nb_rb_pusch; pilot_cnt += 4) {
int32_t ch_0, ch_1;
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % gNB->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
((__m128i*)ul_ch)[0]=_mm_set1_epi32(*(int32_t*)ch);
((__m128i*)ul_ch)[1]=((__m128i*)ul_ch)[0];
((__m128i*)ul_ch)[2]=((__m128i*)ul_ch)[0];
ul_ch += 24;
ul_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
ul_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
ul_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip4,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip5,
ch,
ul_ch,
8);
ul_ch -= 16;
}
// Last PRB
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % gNB->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
ul_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
ul_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
ul_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
ul_ch,
8);
ul_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip6,
ch,
ul_ch,
8);
}
#ifdef DEBUG_PUSCH
ul_ch = (int16_t *)&ul_ch_estimates[p*gNB->frame_parms.nb_antennas_rx+aarx][ch_offset];
openair1/PHY/NR_UE_ESTIMATION/filt16a_32.c
+21
View File
@@ -239,3 +239,24 @@ short filt8_dcll2[8] = {
short filt8_dclh2[8] = {
0,0,0,0,1489,2979,4468,5958};
short filt8_avlip0[8] = {
16384,16384,16384,16384,16384,16384,16384,15019};
short filt8_avlip1[8] = {
13653,12288,10923,9557,8192,6827,5461,4096};
short filt8_avlip2[8] = {
2731,1365,0,0,0,0,0,0};
short filt8_avlip3[8] = {
2731,4096,5461,6827,8192,9557,10923,12288};
short filt8_avlip4[8] = {
13653,15019,16384,15019,13653,12288,10923,9557};
short filt8_avlip5[8] = {
8192,6827,5461,4096,2731,1365,0,0};
short filt8_avlip6[8] = {
13653,15019,16384,16384,16384,16384,16384,16384};
openair1/PHY/NR_UE_ESTIMATION/filt16a_32.h
+14 -1
View File
@@ -169,4 +169,17 @@ extern short filt8_dcll2[8];
extern short filt8_dclh2[8];
#endif
extern short filt8_avlip0[8];
extern short filt8_avlip1[8];
extern short filt8_avlip2[8];
extern short filt8_avlip3[8];
extern short filt8_avlip4[8];
extern short filt8_avlip5[8];
extern short filt8_avlip6[8];
#endif
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+267 -13
View File
@@ -1198,9 +1198,72 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
}
}
else if (config_type == pdsch_dmrs_type1) { // this is case without frequency-domain linear interpolation, just take average of LS channel estimates of 6 DMRS REs and use a common value for the whole PRB
int32_t ch_0, ch_1;
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
multadd_real_vector_complex_scalar(filt8_avlip0,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip1,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip2,
ch,
dl_ch,
8);
dl_ch -= 24;
for (pilot_cnt=0; pilot_cnt<6*nb_rb_pdsch; pilot_cnt += 6) {
int32_t ch_0, ch_1;
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
@@ -1246,13 +1309,140 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
((__m128i*)dl_ch)[0]=_mm_set1_epi32(*(int32_t*)ch);
((__m128i*)dl_ch)[1]=((__m128i*)dl_ch)[0];
((__m128i*)dl_ch)[2]=((__m128i*)dl_ch)[0];
dl_ch += 24;
dl_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
dl_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
dl_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip4,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip5,
ch,
dl_ch,
8);
dl_ch -= 16;
}
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 6;
ch[1] = ch_1 / 6;
dl_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
dl_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
dl_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip6,
ch,
dl_ch,
8);
}
else { // this is case without frequency-domain linear interpolation, just take average of LS channel estimates of 4 DMRS REs and use a common value for the whole PRB
int32_t ch_0, ch_1;
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
multadd_real_vector_complex_scalar(filt8_avlip0,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip1,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip2,
ch,
dl_ch,
8);
dl_ch -= 24;
for (pilot_cnt=0; pilot_cnt<4*nb_rb_pdsch; pilot_cnt += 4) {
int32_t ch_0, ch_1;
@@ -1260,37 +1450,101 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+2) % ue->frame_parms.ofdm_symbol_size;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
((__m128i*)dl_ch)[0]=_mm_set1_epi32(*(int32_t*)ch);
((__m128i*)dl_ch)[1]=((__m128i*)dl_ch)[0];
((__m128i*)dl_ch)[2]=((__m128i*)dl_ch)[0];
dl_ch += 24;
dl_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
dl_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
dl_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip4,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip5,
ch,
dl_ch,
8);
dl_ch -= 16;
}
ch_0 = ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 = ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+1) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch_0 += ((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15;
ch_1 += ((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15;
pil += 2;
re_offset = (re_offset+5) % ue->frame_parms.ofdm_symbol_size;
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = ch_0 / 4;
ch[1] = ch_1 / 4;
dl_ch[6] += (ch[0] * 1365)>>15; // 1/12*16384
dl_ch[7] += (ch[1] * 1365)>>15; // 1/12*16384
dl_ch += 8;
multadd_real_vector_complex_scalar(filt8_avlip3,
ch,
dl_ch,
8);
dl_ch += 16;
multadd_real_vector_complex_scalar(filt8_avlip6,
ch,
dl_ch,
8);
}
#ifdef DEBUG_PDSCH
dl_ch = (int16_t *)&dl_ch_estimates[p*ue->frame_parms.nb_antennas_rx+aarx][ch_offset];