maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Providing time domain channel estimates

Browse Source
This commit is contained in:
Ahmed Hussein
2019-08-23 16:08:57 +02:00
committed by Thomas Schlichter
parent 53e6a5223c
commit 768d214122
1 changed files with 69 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+69 -7
View File
@@ -30,12 +30,12 @@
int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
uint8_t gNB_offset,
unsigned char Ns,
unsigned short p,
unsigned char symbol,
unsigned short bwp_start_subcarrier,
unsigned short nb_rb_pusch)
uint8_t gNB_offset,
unsigned char Ns,
unsigned short p,
unsigned char symbol,
unsigned short bwp_start_subcarrier,
unsigned short nb_rb_pusch)
{
int pilot[1320] __attribute__((aligned(16)));
unsigned char aarx;
@@ -44,6 +44,8 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
int16_t ch[2],*pil,*rxF,*ul_ch,*fl,*fm,*fr,*fml,*fmr,*fmm;
int ch_offset,symbol_offset, length_dmrs, UE_id = 0;
unsigned short n_idDMRS[2] = {0,1}; //to update from pusch config
int32_t temp_in_ifft_0[8192*2] __attribute__((aligned(32)));
int32_t **ul_ch_estimates_time = gNB->pusch_vars[UE_id]->ul_ch_estimates_time;
#ifdef DEBUG_CH
FILE *debug_ch_est;
@@ -253,8 +255,68 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
ch,
ul_ch,
8);
//}
// Convert to time domain
memset(temp_in_ifft_0,0,gNB->frame_parms.ofdm_symbol_size*sizeof(int32_t));
for(int ii = 0; ii < nb_rb_pusch*12; ii++)
((int32_t*)temp_in_ifft_0)[ii] = ul_ch_estimates[aarx][symbol_offset+ii];
switch (gNB->frame_parms.ofdm_symbol_size) {
case 128:
idft128((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 256:
idft256((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 512:
idft512((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 1024:
idft1024((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 1536:
idft1536((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 2048:
idft2048((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 4096:
idft4096((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
case 8192:
idft8192((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
default:
idft512((int16_t*) temp_in_ifft_0,
(int16_t*) ul_ch_estimates_time[aarx],
1);
break;
}
}
#ifdef DEBUG_CH