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srsLTE
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Compute per-antenna and per-port chest metrics in chest_res

This commit is contained in:
Ismael Gomez 2019-04-29 15:25:01 +02:00
parent 2d9b7756df
commit 47acbc1e08
2 changed files with 16 additions and 17 deletions
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7
lib/include/srslte/phy/ch_estimation/chest_dl.h
View File

@ -52,12 +52,15 @@ typedef struct SRSLTE_API {
float noise_estimate;
float noise_estimate_dbm;
float snr_db;
float snr_ant_port_db[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
float rsrp;
float rsrp_dbm;
float rsrp_neigh_dbm;
float rsrp_port_dbm[SRSLTE_MAX_PORTS];
float rsrp_ant_port_dbm[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
float rsrq;
float rsrq_db;
float rsrq_ant_port_db[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
float rssi_dbm;
float cfo;
} srslte_chest_dl_res_t;
@ -149,8 +152,4 @@ SRSLTE_API int srslte_chest_dl_estimate_cfg(srslte_chest_dl_t* q,
cf_t* input[SRSLTE_MAX_PORTS],
srslte_chest_dl_res_t* res);
/* These functions are exceptions and return values from last call to chest_dl_estimate */
SRSLTE_API float srslte_chest_dl_get_rsrq_ant_port(srslte_chest_dl_t* q, uint32_t ant_idx, uint32_t port_idx);
SRSLTE_API float srslte_chest_dl_get_rsrp_ant_port(srslte_chest_dl_t* q, uint32_t ant_idx, uint32_t port);
#endif // SRSLTE_CHEST_DL_H

26
lib/src/phy/ch_estimation/chest_dl.c
View File

@ -766,24 +766,15 @@ static float get_rsrq(srslte_chest_dl_t* q)
return n / q->nof_rx_antennas;
}
float srslte_chest_dl_get_rsrq_ant_port(srslte_chest_dl_t *q, uint32_t ant_idx, uint32_t port_idx) {
return q->cell.nof_prb*q->rsrp[ant_idx][port_idx] / q->rssi[ant_idx][port_idx];
}
float srslte_chest_dl_get_rsrp_ant_port(srslte_chest_dl_t* q, uint32_t ant_idx, uint32_t port)
{
return q->rsrp[ant_idx][port];
}
static float get_rsrp_port(srslte_chest_dl_t* q, uint32_t port)
{
float sum = 0.0f;
for (int j = 0; j < q->cell.nof_ports; ++j) {
sum +=q->rsrp[port][j];
for (int j = 0; j < q->nof_rx_antennas; ++j) {
sum += q->rsrp[j][port];
}
if (q->cell.nof_ports) {
sum /= q->cell.nof_ports;
if (q->nof_rx_antennas) {
sum /= q->nof_rx_antennas;
}
return sum;
@ -855,6 +846,15 @@ static void fill_res(srslte_chest_dl_t* q, srslte_chest_dl_res_t* res)
for (uint32_t port_id = 0; port_id < q->cell.nof_ports; port_id++) {
res->rsrp_port_dbm[port_id] = dbm(get_rsrp_port(q, port_id));
for (uint32_t a = 0; a < q->nof_rx_antennas; a++) {
if (q->noise_estimate[a]) {
res->snr_ant_port_db[a][port_id] = db(q->rsrp[a][port_id] / q->noise_estimate[a][port_id]);
} else {
res->snr_ant_port_db[a][port_id] = 0.0;
}
res->rsrp_ant_port_dbm[a][port_id] = db(q->rsrp[a][port_id]);
res->rsrq_ant_port_db[a][port_id] = db(q->cell.nof_prb * q->rsrp[a][port_id] / q->rssi[a][port_id]);
}
}
}