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Some updates in uplink and downlink channel estimations

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This commit is contained in:
Sakthivel Velumani
2019-11-13 14:35:14 +01:00
parent c3fcee20a1
commit 3185728107
3 changed files with 87 additions and 123 deletions
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openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+42 -60
View File
@@ -37,7 +37,7 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
unsigned short bwp_start_subcarrier,
unsigned short nb_rb_pusch)
{
int pilot[1320] __attribute__((aligned(16)));
int pilot[3280] __attribute__((aligned(16)));
unsigned char aarx;
unsigned short k;
unsigned int pilot_cnt;
@@ -264,77 +264,59 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
uint16_t idxPil = idxDC/2;
re_offset = k;
pil = (int16_t *)&pilot[0];
pil += (idxPil-2);
ul_ch += (idxDC-4);
ul_ch = memset(ul_ch, 0, sizeof(int16_t)*10);
re_offset = (re_offset+idxDC/2-2)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
// for proper allignment of SIMD vectors
if((gNB->frame_parms.N_RB_UL&1)==0) {
pil += (idxPil-4);
ul_ch += (idxDC-8);
ul_ch = memset(ul_ch, 0, sizeof(int16_t)*14);
re_offset = (re_offset+idxDC/2-4)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(fl,
ch,
ul_ch,
8);
pil += 2;
re_offset = (re_offset+2)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcl,
ch,
ul_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr,
ch,
ul_ch,
8);
} else {
pil += (idxPil-2);
ul_ch += (idxDC-4);
ul_ch = memset(ul_ch, 0, sizeof(int16_t)*10);
re_offset = (re_offset+idxDC/2-2)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcl_h,
ch,
ul_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr_h,
ch,
ul_ch,
8);
multadd_real_vector_complex_scalar(filt8_dcl,
ch,
ul_ch-4,
8);
pil += 4;
re_offset = (re_offset+4)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr,
ch,
ul_ch-4,
8);
} else {
multadd_real_vector_complex_scalar(filt8_dcl_h,
ch,
ul_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(gNB->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr_h,
ch,
ul_ch,
8);
}
}
#ifdef DEBUG_PDSCH
ul_ch = (int16_t *)&ul_ch_estimates[aarx][ch_offset];
for(uint16_t idxP=0; idxP<(nb_rb_pusch*12/8); idxP++) {
for(uint16_t idxP=0; idxP<ceil((float)nb_rb_pusch*12/8); idxP++) {
for(uint8_t idxI=0; idxI<16; idxI+=2) {
printf("%d\t%d\t",ul_ch[idxP*16+idxI],ul_ch[idxP*16+idxI+1]);
}
printf("\n");
printf("%d\n",idxP);
}
#endif
// Convert to time domain
openair1/PHY/NR_UE_ESTIMATION/filt16a_32.c
+2 -2
View File
@@ -136,7 +136,7 @@ short filt8_dcmd[8]= {
0,0,0,4096,4096,8192,12288,16384};
short filt8_dcl[8]= {
0,8192,16384,12288,8192,4096,0,0};
0,0,16384,12288,8192,4096,0,0};
short filt8_dcr[8]= {
0,0,0,4096,8192,12288,16384,0};
@@ -145,7 +145,7 @@ short filt8_dcl_h[8]= {
16384,12288,8192,4096,0,0,0,0};
short filt8_dcr_h[8]= {
0,4096,8192,1228,16384,0,0,0};
0,4096,8192,12288,16384,0,0,0};
short filt8_l1[8] = {
24576,16384,0,0,0,0,0,0};
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+43 -61
View File
@@ -666,7 +666,7 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
unsigned short bwp_start_subcarrier,
unsigned short nb_rb_pdsch)
{
int pilot[1320] __attribute__((aligned(16)));
int pilot[3280] __attribute__((aligned(16)));
unsigned char aarx;
unsigned short k;
unsigned int pilot_cnt;
@@ -839,7 +839,7 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
}
// Treat first 2 pilots specially (right edge)
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
#ifdef DEBUG_PDSCH
printf("pilot %u : rxF - > (%d,%d) ch -> (%d,%d), pil -> (%d,%d) \n",pilot_cnt,rxF[0],rxF[1],ch[0],ch[1],pil[0],pil[1]);
@@ -892,78 +892,60 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
uint16_t idxPil = idxDC/2;
re_offset = k;
pil = (int16_t *)&pilot[rb_offset*((config_type==0) ? 6:4)];
pil += (idxPil-2);
dl_ch += (idxDC-4);
dl_ch = memset(dl_ch, 0, sizeof(int16_t)*10);
re_offset = (re_offset+idxDC/2-2)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
// for proper allignment of SIMD vectors
if((ue->frame_parms.N_RB_DL&1)==0) {
pil += (idxPil-4);
dl_ch += (idxDC-8);
dl_ch = memset(dl_ch, 0, sizeof(int16_t)*14);
re_offset = (re_offset+idxDC/2-4)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(fl,
ch,
dl_ch,
8);
multadd_real_vector_complex_scalar(filt8_dcl,
ch,
dl_ch-4,
8);
pil += 4;
re_offset = (re_offset+4)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr,
ch,
dl_ch-4,
8);
} else {
pil += 2;
re_offset = (re_offset+2)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcl,
ch,
dl_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr,
ch,
dl_ch,
8);
} else {
pil += (idxPil-2);
dl_ch += (idxDC-4);
dl_ch = memset(dl_ch, 0, sizeof(int16_t)*10);
re_offset = (re_offset+idxDC/2-2)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcl_h,
ch,
dl_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr_h,
ch,
dl_ch,
8);
multadd_real_vector_complex_scalar(filt8_dcl_h,
ch,
dl_ch,
8);
pil += 4;
re_offset = (re_offset+4)&(ue->frame_parms.ofdm_symbol_size-1);
rxF = (int16_t *)&rxdataF[aarx][(symbol_offset+nushift+re_offset)];
ch[0] = (int16_t)(((int32_t)pil[0]*rxF[0] - (int32_t)pil[1]*rxF[1])>>15);
ch[1] = (int16_t)(((int32_t)pil[0]*rxF[1] + (int32_t)pil[1]*rxF[0])>>15);
multadd_real_vector_complex_scalar(filt8_dcr_h,
ch,
dl_ch,
8);
}
}
#ifdef DEBUG_PDSCH
dl_ch = (int16_t *)&dl_ch_estimates[aarx][ch_offset];
for(uint16_t idxP=0; idxP<(nb_rb_pdsch*12/8); idxP++) {
for(uint16_t idxP=0; idxP<ceil((float)nb_rb_pdsch*12/8); idxP++) {
for(uint8_t idxI=0; idxI<16; idxI+=2) {
printf("%d\t%d\t",dl_ch[idxP*16+idxI],dl_ch[idxP*16+idxI+1]);
}
printf("\n");
printf("%d\n",idxP);
}
#endif
}