SRSENB: tx gain per channel and fix bug

lib/src/radio/radio.cc

@@ -181,7 +181,7 @@ int radio::init(const rf_args_t& args, phy_interface_radio* phy_)
   // Set individual gains
   for (uint32_t i = 0; i < args.nof_carriers; i++) {
     if (args.tx_gain_ch[i] > 0) {
-      for (uint32_t j = 0; j < nof_antennas; i++) {
+      for (uint32_t j = 0; j < nof_antennas; j++) {
         uint32_t phys_antenna_idx = i * nof_antennas + j;
 
         // From channel number deduce RF device index and channel

srsenb/src/main.cc

@@ -90,6 +90,11 @@ void parse_args(all_args_t* args, int argc, char* argv[])
     ("rf.srate",          bpo::value<double>(&args->rf.srate_hz)->default_value(0.0),     "Force Tx and Rx sampling rate in Hz")
     ("rf.rx_gain",        bpo::value<float>(&args->rf.rx_gain)->default_value(50),        "Front-end receiver gain")
     ("rf.tx_gain",        bpo::value<float>(&args->rf.tx_gain)->default_value(70),        "Front-end transmitter gain")
+    ("rf.tx_gain[0]",     bpo::value<float>(&args->rf.tx_gain_ch[0])->default_value(-1),  "Front-end transmitter gain CH0")
+    ("rf.tx_gain[1]",     bpo::value<float>(&args->rf.tx_gain_ch[1])->default_value(-1),  "Front-end transmitter gain CH1")
+    ("rf.tx_gain[2]",     bpo::value<float>(&args->rf.tx_gain_ch[2])->default_value(-1),  "Front-end transmitter gain CH2")
+    ("rf.tx_gain[3]",     bpo::value<float>(&args->rf.tx_gain_ch[3])->default_value(-1),  "Front-end transmitter gain CH3")
+    ("rf.tx_gain[4]",     bpo::value<float>(&args->rf.tx_gain_ch[4])->default_value(-1),  "Front-end transmitter gain CH4")
     ("rf.dl_freq",        bpo::value<float>(&args->rf.dl_freq)->default_value(-1),        "Downlink Frequency (if positive overrides EARFCN)")
     ("rf.ul_freq",        bpo::value<float>(&args->rf.ul_freq)->default_value(-1),        "Uplink Frequency (if positive overrides EARFCN)")