Add rx_gain_offset interface for RSRP calibration

lib/include/srslte/interfaces/ue_interfaces.h

@@ -492,6 +492,7 @@ typedef struct {
   float estimator_fil_w;   
   bool rssi_sensor_enabled;
   bool sic_pss_enabled;
+  float rx_gain_offset;
 } phy_args_t; 
 
 

srsue/src/main.cc

@@ -162,7 +162,11 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
      bpo::value<bool>(&args->expert.phy.rssi_sensor_enabled)->default_value(true),
      "Enable or disable RF frontend RSSI sensor. In some USRP devices can cause segmentation fault")
 
-    ("expert.prach_gain",
+    ("expert.rx_gain_offset",
+     bpo::value<float>(&args->expert.phy.rx_gain_offset)->default_value(10),
+     "RX Gain offset to add to rx_gain to correct RSRP value")
+
+      ("expert.prach_gain",
      bpo::value<float>(&args->expert.phy.prach_gain)->default_value(-1.0),
      "Disable PRACH power control")
 

srsue/src/phy/phch_recv.cc

@@ -675,7 +675,7 @@ void phch_recv::run_thread()
             case 1:
 
               if (last_worker) {
-                Info("SF: cfo_tot=%7.1f Hz, ref=%f Hz, pss=%f Hz, snr_sf=%.2f dB, rsrp=%.2f dB, noise=%.2f dB\n",
+                Debug("SF: cfo_tot=%7.1f Hz, ref=%f Hz, pss=%f Hz, snr_sf=%.2f dB, rsrp=%.2f dB, noise=%.2f dB\n",
                         srslte_ue_sync_get_cfo(&ue_sync),
                      15000*last_worker->get_ref_cfo(),
                      15000*ue_sync.strack.cfo_pss_mean,

srsue/src/phy/phch_worker.cc

@@ -1386,7 +1386,7 @@ void phch_worker::update_measurements()
           phy->last_radio_rssi = phy->get_radio()->get_rssi();
           phy->rx_gain_offset = phy->avg_rssi_dbm - phy->last_radio_rssi + 30;
         } else {
-          phy->rx_gain_offset = phy->get_radio()->get_rx_gain();
+          phy->rx_gain_offset = phy->get_radio()->get_rx_gain() + phy->args->rx_gain_offset;
         }
       }
       rssi_read_cnt++;