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

Power noise estimation based on SRS

Browse Source
This commit is contained in:
rmagueta
2021-12-02 01:30:06 +00:00
parent 340508ffe0
commit 3d00d78af8
5 changed files with 42 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/INIT/nr_init.c
+1 -1
View File
@@ -198,7 +198,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
for (int id=0; id<NUMBER_OF_NR_SRS_MAX; id++) {
gNB->nr_srs_info[id] = (nr_srs_info_t *)malloc16_clear(sizeof(nr_srs_info_t));
gNB->nr_srs_info[id]->srs_generated_signal = (int32_t*)malloc16_clear(fp->samples_per_frame*sizeof(int32_t));
gNB->nr_srs_info[id]->noise_power = (double*)malloc16_clear(sizeof(double));
gNB->nr_srs_info[id]->noise_power = (uint32_t*)malloc16_clear(sizeof(uint32_t));
gNB->nr_srs_info[id]->srs_received_signal = (int32_t **)malloc16(Prx*sizeof(int32_t*));
gNB->nr_srs_info[id]->srs_ls_estimated_channel = (int32_t **)malloc16(Prx*sizeof(int32_t*));
gNB->nr_srs_info[id]->srs_estimated_channel = (int32_t **)malloc16(Prx*sizeof(int32_t*));
openair1/PHY/INIT/nr_init_ue.c
+1 -1
View File
@@ -325,7 +325,7 @@ int init_nr_ue_signal(PHY_VARS_NR_UE *ue,
srs_vars[gNB_id]->active = false;
ue->nr_srs_info = (nr_srs_info_t *)malloc16_clear(sizeof(nr_srs_info_t));
ue->nr_srs_info->srs_generated_signal = (int32_t *) malloc16_clear( (2*(fp->samples_per_frame)+2048)*sizeof(int32_t) );
ue->nr_srs_info->noise_power = (double*)malloc16_clear(sizeof(double));
ue->nr_srs_info->noise_power = (uint32_t*)malloc16_clear(sizeof(uint32_t));
ue->nr_srs_info->srs_received_signal = (int32_t **)malloc16( fp->nb_antennas_rx*sizeof(int32_t *) );
ue->nr_srs_info->srs_ls_estimated_channel = (int32_t **)malloc16( fp->nb_antennas_rx*sizeof(int32_t *) );
ue->nr_srs_info->srs_estimated_channel = (int32_t **)malloc16( fp->nb_antennas_rx*sizeof(int32_t *) );
openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+38 -8
View File
@@ -1093,6 +1093,16 @@ void nr_pusch_ptrs_processing(PHY_VARS_gNB *gNB,
}//Antenna loop
}
uint32_t calc_power(uint16_t *x, uint32_t size) {
uint64_t sum_x = 0;
uint64_t sum_x2 = 0;
for(int k = 0; k<size; k++) {
sum_x = sum_x + x[k];
sum_x2 = sum_x2 + x[k]*x[k];
}
return sum_x2/size - (sum_x/size)*(sum_x/size);
}
int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
int frame,
int slot,
@@ -1101,7 +1111,7 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
int32_t *srs_generated_signal,
int32_t **srs_received_signal,
int32_t **srs_estimated_channel,
double *noise_power) {
uint32_t *noise_power) {
if(nr_srs_info->n_symbs==0) {
LOG_E(NR_PHY, "(%d.%d) nr_srs_info was not generated yet!\n", frame, slot);
@@ -1112,6 +1122,10 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
int32_t **srs_ls_estimated_channel = nr_srs_info->srs_ls_estimated_channel;
uint64_t subcarrier_offset = frame_parms->first_carrier_offset + srs_pdu->bwp_start*12;
uint16_t noise_real[frame_parms->nb_antennas_rx*nr_srs_info->n_symbs];
uint16_t noise_imag[frame_parms->nb_antennas_rx*nr_srs_info->n_symbs];
int16_t prev_ls_estimated[2];
int16_t ls_estimated[2];
for (int ant = 0; ant < frame_parms->nb_antennas_rx; ant++) {
@@ -1133,9 +1147,15 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
// So we only need a nr_srs_info->srs_generated_signal_bits shift to ensure that the result fits into 16 bits.
ls_estimated[0] = (int16_t)(((int32_t)generated_real*received_real + (int32_t)generated_imag*received_imag)>>nr_srs_info->srs_generated_signal_bits);
ls_estimated[1] = (int16_t)(((int32_t)generated_real*received_imag - (int32_t)generated_imag*received_real)>>nr_srs_info->srs_generated_signal_bits);
srs_ls_estimated_channel[ant][nr_srs_info->subcarrier_idx[sc_idx] + subcarrier_offset] = ls_estimated[0] + (((int32_t)ls_estimated[1]<<16)&0xFFFF0000);
if(sc_idx>0) {
ls_estimated[0] = (ls_estimated[0] + prev_ls_estimated[0])>>1;
ls_estimated[1] = (ls_estimated[1] + prev_ls_estimated[1])>>1;
}
prev_ls_estimated[0] = (int16_t)(((int32_t)generated_real*received_real + (int32_t)generated_imag*received_imag)>>nr_srs_info->srs_generated_signal_bits);
prev_ls_estimated[1] = (int16_t)(((int32_t)generated_real*received_imag - (int32_t)generated_imag*received_real)>>nr_srs_info->srs_generated_signal_bits);
// Channel interpolation
if(srs_pdu->comb_size == 0) {
if(sc_idx == 0) {
@@ -1156,6 +1176,9 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
multadd_real_vector_complex_scalar(filt8_dcl0_h, ls_estimated, srs_estimated_channel16, 8);
}
noise_real[ant*nr_srs_info->n_symbs+sc_idx] = abs(prev_ls_estimated[0] - (int16_t)(srs_estimated_channel[ant][nr_srs_info->subcarrier_idx[sc_idx] + subcarrier_offset]&0xFFFF));
noise_imag[ant*nr_srs_info->n_symbs+sc_idx] = abs(prev_ls_estimated[1] - (int16_t)((srs_estimated_channel[ant][nr_srs_info->subcarrier_idx[sc_idx] + subcarrier_offset]>>16)&0xFFFF));
#ifdef SRS_DEBUG
if(sc_idx == 0) {
LOG_I(NR_PHY,"______________________________ Rx antenna %i _______________________________\n", ant);
@@ -1168,29 +1191,36 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
nr_srs_info->subcarrier_idx[sc_idx],
generated_real, generated_imag,
received_real, received_imag,
ls_estimated[0], ls_estimated[1]);
prev_ls_estimated[0], prev_ls_estimated[1]);
#endif
}
}
*noise_power = calc_power(noise_real,frame_parms->nb_antennas_rx*nr_srs_info->n_symbs)
+ calc_power(noise_imag,frame_parms->nb_antennas_rx*nr_srs_info->n_symbs);
#ifdef SRS_DEBUG
uint8_t shift = srs_pdu->comb_size == 0 ? 1 : 2;
for (int ant = 0; ant < frame_parms->nb_antennas_rx; ant++) {
for(int sc = 0; sc <= nr_srs_info->subcarrier_idx[nr_srs_info->n_symbs-1]; sc++) {
if(sc == 0) {
LOG_I(NR_PHY,"__________________ Rx antenna %i ___________________\n", ant);
LOG_I(NR_PHY,"______________________________ Rx antenna %i _______________________________\n", ant);
}
if(sc%12 == 0) {
LOG_I(NR_PHY,":::::::::::::::::::::::: %i ::::::::::::::::::::::::\n", sc/12);
LOG_I(NR_PHY,"\t __lsRe__________lsIm__|____intRe_______intIm_\n");
LOG_I(NR_PHY,":::::::::::::::::::::::::::::::::::: %i ::::::::::::::::::::::::::::::::::::\n", sc/12);
LOG_I(NR_PHY,"\t __lsRe__________lsIm__|____intRe_______intIm__|____noiRe_______noiIm_\n");
}
LOG_I(NR_PHY,"(%4i) %6i\t%6i | %6i\t%6i\n",
LOG_I(NR_PHY,"(%4i) %6i\t%6i | %6i\t%6i | %6i\t%6i\n",
sc,
(int16_t)(srs_ls_estimated_channel[ant][sc+subcarrier_offset]&0xFFFF),
(int16_t)((srs_ls_estimated_channel[ant][sc+subcarrier_offset]>>16)&0xFFFF),
(int16_t)(srs_estimated_channel[ant][sc+subcarrier_offset]&0xFFFF),
(int16_t)((srs_estimated_channel[ant][sc+subcarrier_offset]>>16)&0xFFFF));
(int16_t)((srs_estimated_channel[ant][sc+subcarrier_offset]>>16)&0xFFFF),
noise_real[ant*nr_srs_info->n_symbs+(sc>>shift)],
noise_imag[ant*nr_srs_info->n_symbs+(sc>>shift)]);
}
}
LOG_I(NR_PHY,"noise_power = %u\n", *noise_power);
#endif
return 0;
openair1/PHY/NR_ESTIMATION/nr_ul_estimation.h
+1 -1
View File
@@ -71,5 +71,5 @@ int nr_srs_channel_estimation(PHY_VARS_gNB *gNB,
int32_t *srs_generated_signal,
int32_t **srs_received_signal,
int32_t **srs_estimated_channel,
double *noise_power);
uint32_t *noise_power);
#endif
openair1/PHY/defs_nr_common.h
+1 -1
View File
@@ -248,7 +248,7 @@ typedef struct {
int32_t **srs_received_signal;
int32_t **srs_ls_estimated_channel;
int32_t **srs_estimated_channel;
double *noise_power;
uint32_t *noise_power;
} nr_srs_info_t;
typedef struct NR_DL_FRAME_PARMS NR_DL_FRAME_PARMS;