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UE changes in PHY- Enable SSB based SINR measurement

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This commit is contained in:
Raghavendra Dinavahi
2025-04-15 16:02:34 +02:00
parent 61778f3d55
commit 6e371b9e48
9 changed files with 35 additions and 20 deletions
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openair1/PHY/NR_UE_ESTIMATION/nr_estimation.h
+5 -5
View File
@@ -111,11 +111,11 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
uint32_t pdsch_est_size,
int32_t dl_ch_estimates[][pdsch_est_size]);
int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier);
uint32_t nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier);
void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
uint8_t gNB_index,
openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c
+16 -11
View File
@@ -172,11 +172,11 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
// This function calculates:
// - SS reference signal received digital power in dB/RE
int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier)
uint32_t nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier)
{
int k_start = 56;
int k_end = 183;
@@ -209,9 +209,7 @@ int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
LOG_D(PHY, "In %s: RSRP/nb_re: %d nb_re :%d\n", __FUNCTION__, rsrp, nb_re);
int rsrp_db_per_re = 10 * log10(rsrp);
return rsrp_db_per_re;
return rsrp;
}
// This function implements:
@@ -234,7 +232,8 @@ void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
if (fp->half_frame_bit)
symbol_offset += (fp->slots_per_frame >> 1) * fp->symbols_per_slot;
int rsrp_db_per_re = nr_ue_calculate_ssb_rsrp(fp, proc, rxdataF, symbol_offset, fp->ssb_start_subcarrier);
uint32_t rsrp_avg = nr_ue_calculate_ssb_rsrp(fp, proc, rxdataF, symbol_offset, fp->ssb_start_subcarrier);
float rsrp_db_per_re = 10 * log10(rsrp_avg);
openair0_config_t *cfg0 = &openair0_cfg[0];
@@ -242,12 +241,18 @@ void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
- ((int)cfg0->rx_gain[0] - (int)cfg0->rx_gain_offset[0])
- dB_fixed(fp->ofdm_symbol_size);
// to obtain non-integer dB value with a resoluion of 0.5dB
uint32_t signal_pwr = rsrp_avg > ue->measurements.n0_power_avg ? rsrp_avg - ue->measurements.n0_power_avg : 0;
int SNRtimes10 = dB_fixed_x10(signal_pwr) - dB_fixed_x10(ue->measurements.n0_power_avg);
ue->measurements.ssb_sinr_dB[ssb_index] = SNRtimes10 / 10.0;
LOG_D(PHY,
"[UE %d] ssb %d SS-RSRP: %d dBm/RE (%d dB/RE)\n",
"[UE %d] ssb %d SS-RSRP: %d dBm/RE (%f dB/RE), SS-SINR: %f dB\n",
ue->Mod_id,
ssb_index,
ue->measurements.ssb_rsrp_dBm[ssb_index],
rsrp_db_per_re);
rsrp_db_per_re,
ue->measurements.ssb_sinr_dB[ssb_index]);
}
// This function computes the received noise power