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Included DC handling for odd number of RBs

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This commit is contained in:
Sakthivel Velumani
2019-11-12 14:28:34 +01:00
parent 497afe4f58
commit 09b38541c8
3 changed files with 69 additions and 44 deletions
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openair1/PHY/NR_UE_ESTIMATION/filt16a_32.c
+6
View File
@@ -141,6 +141,12 @@ short filt8_dcl[8]= {
short filt8_dcr[8]= {
0,0,0,4096,8192,12288,16384,0};
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};
short filt8_l1[8] = {
24576,16384,0,0,0,0,0,0};
openair1/PHY/NR_UE_ESTIMATION/filt16a_32.h
+4
View File
@@ -103,6 +103,10 @@ extern short filt8_dcl[8];
extern short filt8_dcr[8];
extern short filt8_dcl_h[8];
extern short filt8_dcr_h[8];
extern short filt8_l1[8];
extern short filt8_ml1[8];
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+59 -44
View File
@@ -892,54 +892,69 @@ 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-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);
// 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);
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);
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);
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);
}
/*
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_dcmd,
ch,
dl_ch,
8);
*/
}
#ifdef DEBUG_PDSCH