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Improved channel estimates around DC;

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ignored only DC pilot
This commit is contained in:
Sakthivel Velumani
2019-11-07 16:34:33 +01:00
parent ca9b4d7ed9
commit f5b0658a70
1 changed files with 8 additions and 6 deletions
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openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+8 -6
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@@ -895,14 +895,14 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
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)*16);
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(filt8_dcma,
multadd_real_vector_complex_scalar(fl,
ch,
dl_ch,
8);
@@ -913,7 +913,7 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
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_dcmb,
multadd_real_vector_complex_scalar(filt8_dcl,
ch,
dl_ch,
8);
@@ -924,11 +924,12 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
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_dcmc,
multadd_real_vector_complex_scalar(filt8_dcr,
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)];
@@ -939,9 +940,10 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
ch,
dl_ch,
8);
*/
}
//#ifdef DEBUG_PDSCH
#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(uint8_t idxI=0; idxI<16; idxI+=2) {
@@ -949,7 +951,7 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
}
printf("\n");
}
//#endif
#endif
}
return(0);