Added API to access port/ant chest values

lib/include/srslte/phy/ch_estimation/chest_dl.h

@@ -159,14 +159,30 @@ SRSLTE_API void srslte_chest_dl_average_subframe(srslte_chest_dl_t *q,
 
 SRSLTE_API float srslte_chest_dl_get_noise_estimate(srslte_chest_dl_t *q);
 
+SRSLTE_API float srslte_chest_dl_get_noise_estimate_ant_port(srslte_chest_dl_t *q,
+                                                             uint32_t ant_idx,
+                                                             uint32_t port_idx);
+
 SRSLTE_API float srslte_chest_dl_get_cfo(srslte_chest_dl_t *q);
 
 SRSLTE_API float srslte_chest_dl_get_snr(srslte_chest_dl_t *q);
 
+SRSLTE_API float srslte_chest_dl_get_snr_ant_port(srslte_chest_dl_t *q,
+                                                  uint32_t ant_idx,
+                                                  uint32_t port_idx);
+
 SRSLTE_API float srslte_chest_dl_get_rssi(srslte_chest_dl_t *q);
 
 SRSLTE_API float srslte_chest_dl_get_rsrq(srslte_chest_dl_t *q);
 
+SRSLTE_API float srslte_chest_dl_get_rsrq_ant_port(srslte_chest_dl_t *q,
+                                                   uint32_t ant_idx,
+                                                   uint32_t port);
+
+SRSLTE_API float srslte_chest_dl_get_rsrp_ant_port(srslte_chest_dl_t *q,
+                                                   uint32_t ant_idx,
+                                                   uint32_t port);
+
 SRSLTE_API float srslte_chest_dl_get_rsrp_port(srslte_chest_dl_t *q,
                                                      uint32_t port);
 

lib/src/phy/ch_estimation/chest_dl.c

@@ -498,11 +498,8 @@ void chest_interpolate_noise_est(srslte_chest_dl_t *q, cf_t *input, cf_t *ce, ui
   uint32_t npilots = SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id);
   float energy = cabsf(srslte_vec_acc_cc(q->pilot_estimates, npilots)/npilots);
   q->rsrp[rxant_id][port_id] = energy*energy;
-  if (port_id == 0) {
-    /* compute rssi only for port 0 */
   q->rssi[rxant_id][port_id] = srslte_chest_dl_rssi(q, input, port_id);
 }
-}
 
 int srslte_chest_dl_estimate_port(srslte_chest_dl_t *q, cf_t *input, cf_t *ce, uint32_t sf_idx, uint32_t port_id, uint32_t rxant_id) 
 {
@@ -599,6 +596,10 @@ float srslte_chest_dl_get_noise_estimate(srslte_chest_dl_t *q) {
   return n/q->last_nof_antennas;
 }
 
+float srslte_chest_dl_get_noise_estimate_ant_port(srslte_chest_dl_t *q, uint32_t ant_idx, uint32_t port_idx) {
+  return q->noise_estimate[ant_idx][port_idx];
+}
+
 float srslte_chest_dl_get_snr(srslte_chest_dl_t *q) {
 #ifdef FREQ_SEL_SNR
   int nref=SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, 0);
@@ -608,6 +609,11 @@ float srslte_chest_dl_get_snr(srslte_chest_dl_t *q) {
 #endif
 }
 
+
+float srslte_chest_dl_get_snr_ant_port(srslte_chest_dl_t *q, uint32_t ant_idx, uint32_t port_idx) {
+  return srslte_chest_dl_get_rsrp_ant_port(q, ant_idx, port_idx)/srslte_chest_dl_get_noise_estimate_ant_port(q, ant_idx, port_idx);
+}
+
 float srslte_chest_dl_get_rssi(srslte_chest_dl_t *q) {
   float n = 0; 
   for (int i=0;i<q->last_nof_antennas;i++) {
@@ -628,6 +634,14 @@ float srslte_chest_dl_get_rsrq(srslte_chest_dl_t *q) {
   
 }
 
+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];
+}
+
 float srslte_chest_dl_get_rsrp_port(srslte_chest_dl_t *q, uint32_t port) {
   float n = 0;
   for (int i = 0; i < q->last_nof_antennas; i++) {