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Extending dlsch_channel_level to a larger number of

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receive and transmit antennas.
This commit is contained in:
Elena Lukashova
2018-07-06 15:54:35 +02:00
parent 2d49ed99ed
commit 0517367a6e
1 changed files with 33 additions and 34 deletions
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openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c
+33 -34
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@@ -3631,7 +3631,6 @@ void dlsch_scale_channel(int **dl_ch_estimates_ext,
#endif
}
//compute average channel_level on each (TX,RX) antenna pair
void dlsch_channel_level(int **dl_ch_estimates_ext,
LTE_DL_FRAME_PARMS *frame_parms,
@@ -3641,6 +3640,7 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
{
#if defined(__x86_64__)||defined(__i386__)
//printf("symbol = %d\n", symbol);
short rb;
unsigned char aatx,aarx,nre=12,symbol_mod;
@@ -3658,21 +3658,23 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
//nb_rb*nre = y * 2^x
int16_t x = factor2(nb_rb*nre);
int16_t y = (nb_rb*nre)>>x;
//printf("nb_rb*nre = %d = %d * 2^(%d)\n",nb_rb*nre,y,x);
for (aatx=0; aatx<frame_parms->nb_antenna_ports_eNB; aatx++)
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
//clear average level
//clear average level
//printf("aatx = %d, aarx = %d, aatx*frame_parms->nb_antennas_rx + aarx] = %d \n", aatx, aarx, aatx*frame_parms->nb_antennas_rx + aarx);
avg128D = _mm_setzero_si128();
// 5 is always a symbol with no pilots for both normal and extended prefix
dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
dl_ch128=(__m128i *)&dl_ch_estimates_ext[aatx*frame_parms->nb_antennas_rx + aarx][symbol*frame_parms->N_RB_DL*12];
for (rb=0;rb<nb_rb;rb++) {
// printf("rb %d : ",rb);
// print_shorts("ch",&dl_ch128[0]);
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x));
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x));
//printf("rb %d : ",rb);
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x));
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x));
//avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[0],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[0], coeff128),15)));
//avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[1],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[1], coeff128),15)));
@@ -3681,25 +3683,24 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
dl_ch128+=2;
}
else {
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[2],dl_ch128[2]),x));
avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[2],dl_ch128[2]),x));
//avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[2],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[2], coeff128),15)));
dl_ch128+=3;
}
/*
if (rb==0) {
print_shorts("dl_ch128",&dl_ch128[0]);
print_shorts("dl_ch128",&dl_ch128[1]);
print_shorts("dl_ch128",&dl_ch128[2]);
}
*/
/*if(rb==0){
print_shorts("dl_ch128",&dl_ch128[0]);
print_shorts("dl_ch128",&dl_ch128[1]);
print_shorts("dl_ch128",&dl_ch128[2]);
}*/
}
avg[(aatx<<1)+aarx] =(((int32_t*)&avg128D)[0] +
((int32_t*)&avg128D)[1] +
((int32_t*)&avg128D)[2] +
((int32_t*)&avg128D)[3])/y;
// printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
}
avg[aatx*frame_parms->nb_antennas_rx + aarx] =(((int32_t*)&avg128D)[0] +
((int32_t*)&avg128D)[1] +
((int32_t*)&avg128D)[2] +
((int32_t*)&avg128D)[3])/y;
}
_mm_empty();
_m_empty();
@@ -3719,7 +3720,7 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
avg128D = vdupq_n_s32(0);
// 5 is always a symbol with no pilots for both normal and extended prefix
dl_ch128=(int16x4_t *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
dl_ch128=(int16x4_t *)&dl_ch_estimates_ext[aatx*frame_parms->nb_antennas_rx + aarx][symbol*frame_parms->N_RB_DL*12];
for (rb=0; rb<nb_rb; rb++) {
// printf("rb %d : ",rb);
@@ -3729,7 +3730,7 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[2],dl_ch128[2]));
avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[3],dl_ch128[3]));
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->nb_antenna_ports_eNB!=1)) {
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
dl_ch128+=4;
} else {
avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[4],dl_ch128[4]));
@@ -3746,24 +3747,22 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
*/
}
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->nb_antenna_ports_eNB!=1))
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
nre=8;
else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->nb_antenna_ports_eNB==1))
else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
nre=10;
else
nre=12;
avg[(aatx<<1)+aarx] = (((int32_t*)&avg128D)[0] +
((int32_t*)&avg128D)[1] +
((int32_t*)&avg128D)[2] +
((int32_t*)&avg128D)[3])/(nb_rb*nre);
avg[aatx*frame_parms->nb_antennas_rx + aarx] = (((int32_t*)&avg128D)[0] +
((int32_t*)&avg128D)[1] +
((int32_t*)&avg128D)[2] +
((int32_t*)&avg128D)[3])/(nb_rb*nre);
// printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
//printf("Channel level : %d\n",avg[aatx*(frame_parms->nb_antennas_rx-1) + aarx]);
}
#endif
}
void dlsch_channel_level_core(int **dl_ch_estimates_ext,