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Now channel-level dependent part of log2_approx works properly.

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Validating mcs-dependent shift.
This commit is contained in:
lukashov
2016-01-06 13:07:10 +01:00
parent 3262bfa66e
commit 80cb191214
2 changed files with 64 additions and 34 deletions
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openair1/PHY/LTE_TRANSPORT/dlsch_demodulation.c
+62 -33
View File
@@ -58,6 +58,8 @@
//#define DEBUG_DLSCH_DEMOD 1
int avg[4];
int avg_0[4];
int avg_1[4];
// [MCS][i_mod (0,1,2) = (2,4,6)]
unsigned char offset_mumimo_llr_drange_fix=0;
@@ -301,7 +303,7 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
dlsch_ue,
symbol,
nb_rb);
*/
if (first_symbol_flag==1) {
dlsch_channel_level(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
frame_parms,
@@ -352,7 +354,7 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
LOG_D(PHY,"[DLSCH] log2_maxh = %d (%d,%d)\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh,avg[0],avgs);
LOG_D(PHY,"[DLSCH] mimo_mode = %d\n", dlsch0_harq->mimo_mode);
#endif
}
// }
aatx = frame_parms->nb_antennas_tx_eNB;
aarx = frame_parms->nb_antennas_rx;
@@ -420,11 +422,11 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
// scaling interfering channel (following for TM56)
dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
/*dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
frame_parms,
dlsch_ue,
symbol,
nb_rb);
nb_rb);*/
if (first_symbol_flag==1) {
@@ -432,7 +434,8 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
dlsch_channel_level_TM34(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
frame_parms,
lte_ue_pdsch_vars[eNB_id]->pmi_ext,
avg,
avg_0,
avg_1,
symbol,
nb_rb,
dlsch0_harq->mimo_mode);
@@ -444,10 +447,13 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
// by comparing performances if run with -u2 and -u0.
// this is valid only if same mcs are used. We calibrate for mcs 4. Best shift value is 13.
// MCS-dependent LUT will be introduced.
avg[0] = (log2_approx(avg[0])/2) - 13 + interf_unaw_shift;
avg[1] = (log2_approx(avg[1])/2) - 13 + interf_unaw_shift;
lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg[0],0);
lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg[1],0);
avg_0[0] = (log2_approx(avg_0[0])/2) -13 + interf_unaw_shift;
avg_1[0] = (log2_approx(avg_1[0])/2) -13 + interf_unaw_shift;
lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg_0[0],0);
lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg_1[0],0);
//printf("log2_maxh0 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh0);
//printf("log2_maxh1 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh1);
//avg[0] = log2_approx(avg[0]) - 13 + offset_mumimo_llr_drange[dlsch0_harq->mcs][(dlsch1_harq->Qm>>1)-1];
//lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = (log2_approx(avg[0])/2) +interf_unaw_shift_tm4_mcs[dlsch0_harq->mcs];//+offset_mumimo_llr_drange[dlsch0_harq->mcs][(get_Qm(dlsch1_harq->mcs)>>1)-1];
//lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = (log2_approx(avg[0])/2) +interf_unaw_shift_tm4_mcs[dlsch1_harq->mcs];//+offset_mumimo_llr_drange[dlsch1_harq->mcs][(get_Qm(dlsch0_harq->mcs)>>1)-1];
@@ -457,14 +463,18 @@ int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
}
else
else {
// to avoid tails in SNR/BLER curves. -13 is needed to make shift a positive number.
// this is valid only if same mcs are used. We calibrate for mcs 4. Best shift value is 13.
// MCS-dependent LUT will be introduced.
avg[0] = (log2_approx(avg[0])/2) - 13 + interf_unaw_shift;
avg[1] = (log2_approx(avg[1])/2) - 13 + interf_unaw_shift;
lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg[0],0);
lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg[1],0);
avg_0[0] = (log2_approx(avg_0[0])/2) - 13 + interf_unaw_shift;
avg_1[0] = (log2_approx(avg_1[0])/2) - 13 + interf_unaw_shift;
lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg_0[0],0);
lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg_1[0],0);
//printf("log2_maxh0 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh0);
//printf("log2_maxh1 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh1);
}
//printf("TM4 I-UA shift = %d\n",interf_unaw_shift);
//lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = (log2_approx(avg[0])/2) +interf_unaw_shift_tm4_mcs[dlsch0_harq->mcs];
//lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = (log2_approx(avg[0])/2) +interf_unaw_shift_tm4_mcs[dlsch1_harq->mcs];
@@ -3056,8 +3066,9 @@ void dlsch_channel_level(int **dl_ch_estimates_ext,
//compute average channel_level of effective (precoded) channel
void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
LTE_DL_FRAME_PARMS *frame_parms,
unsigned char *pmi_ext,
int *avg,
unsigned char *pmi_ext,
int *avg_0,
int *avg_1,
uint8_t symbol,
unsigned short nb_rb,
MIMO_mode_t mimo_mode){
@@ -3067,14 +3078,15 @@ void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
short rb;
unsigned char aarx,nre=12,symbol_mod;
__m128i *dl_ch0_128,*dl_ch1_128, dl_ch0_128_tmp, dl_ch1_128_tmp,avg128D;
__m128i *dl_ch0_128,*dl_ch1_128, dl_ch0_128_tmp, dl_ch1_128_tmp, avg_0_128D, avg_1_128D;
symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
//clear average level
avg128D = _mm_setzero_si128();
avg[0] = 0;
avg[1] = 0;
avg_0[0] = 0;
avg_0[1] = 0;
avg_1[0] = 0;
avg_1[1] = 0;
// 5 is always a symbol with no pilots for both normal and extended prefix
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
@@ -3088,11 +3100,12 @@ void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
dl_ch0_128 = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
dl_ch1_128 = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
avg128D = _mm_setzero_si128();
avg_0_128D = _mm_setzero_si128();
avg_1_128D = _mm_setzero_si128();
for (rb=0; rb<nb_rb; rb++) {
// printf("rb %d : \n",rb);
// print_shorts("ch0\n",&dl_ch0_128[0]);
//print_shorts("ch1\n",&dl_ch1_128[0]);
dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[0]);
dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[0]);
@@ -3106,8 +3119,10 @@ void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
// mmtmpD0 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[1]);
dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[1]);
@@ -3121,7 +3136,9 @@ void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
// mmtmpD1 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
dl_ch0_128+=2;
@@ -3140,21 +3157,33 @@ void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
else if (mimo_mode==DUALSTREAM_PUSCH_PRECODING)
prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
// mmtmpD2 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
dl_ch0_128+=3;
dl_ch1_128+=3;
}
}
avg[aarx] = (((int*)&avg128D)[0])/(nb_rb*nre) +
(((int*)&avg128D)[1])/(nb_rb*nre) +
(((int*)&avg128D)[2])/(nb_rb*nre) +
(((int*)&avg128D)[3])/(nb_rb*nre);
avg_0[aarx] = (((int*)&avg_0_128D)[0])/(nb_rb*nre) +
(((int*)&avg_0_128D)[1])/(nb_rb*nre) +
(((int*)&avg_0_128D)[2])/(nb_rb*nre) +
(((int*)&avg_0_128D)[3])/(nb_rb*nre);
// printf("From Chan_level aver stream 0 %d =%d\n", aarx, avg_0[aarx]);
avg_1[aarx] = (((int*)&avg_1_128D)[0])/(nb_rb*nre) +
(((int*)&avg_1_128D)[1])/(nb_rb*nre) +
(((int*)&avg_1_128D)[2])/(nb_rb*nre) +
(((int*)&avg_1_128D)[3])/(nb_rb*nre);
// printf("From Chan_level aver stream 1 %d =%d\n", aarx, avg_1[aarx]);
}
// choose maximum of the 2 effective channels
// avg[0] = cmax(avg[0],avg[1]);
avg_0[0] = cmax(avg_0[0], avg_0[1]);
avg_1[0] = cmax(avg_1[0], avg_1[1]);
_mm_empty();
_m_empty();
openair1/PHY/LTE_TRANSPORT/proto.h
+2 -1
View File
@@ -1000,7 +1000,8 @@ void dlsch_channel_level(int32_t **dl_ch_estimates_ext,
void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
LTE_DL_FRAME_PARMS *frame_parms,
unsigned char *pmi_ext,
int *avg,
int *avg_0,
int *avg_1,
uint8_t symbol,
unsigned short nb_rb,
MIMO_mode_t mimo_mode);