tested 23.04 Ms/s sampling for 20 MHz on USRP B210, modifications in usrp_lib.cpp.

targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

@@ -446,28 +446,38 @@ int openair0_dev_init_usrp(openair0_device* device, openair0_config_t *openair0_
     // set master clock rate and sample rate for tx & rx for streaming
 
     device->type = USRP_B200_IF;
-    s->usrp->set_master_clock_rate(30.72e6);
+
 
     openair0_cfg[0].rx_gain_calib_table = calib_table_b210;
 
     switch ((int)openair0_cfg[0].sample_rate) {
     case 30720000:
+      s->usrp->set_master_clock_rate(30.72e6);
             // from usrp_time_offset
       openair0_cfg[0].samples_per_packet    = 2048;
       openair0_cfg[0].tx_sample_advance     = 115;
       openair0_cfg[0].tx_scheduling_advance = 11*openair0_cfg[0].samples_per_packet;
       break;
+    case 23040000:
+      s->usrp->set_master_clock_rate(46.08e6);
+      openair0_cfg[0].samples_per_packet    = 2048;
+      openair0_cfg[0].tx_sample_advance     = 113;
+      openair0_cfg[0].tx_scheduling_advance = 8*openair0_cfg[0].samples_per_packet;
+      break;
     case 15360000:
+      s->usrp->set_master_clock_rate(30.72e6);
       openair0_cfg[0].samples_per_packet    = 2048;
       openair0_cfg[0].tx_sample_advance     = 113;
       openair0_cfg[0].tx_scheduling_advance = 5*openair0_cfg[0].samples_per_packet;
       break;
     case 7680000:
+      s->usrp->set_master_clock_rate(30.72e6);
       openair0_cfg[0].samples_per_packet    = 1024;
       openair0_cfg[0].tx_sample_advance     = 70;//103;
       openair0_cfg[0].tx_scheduling_advance = 5*openair0_cfg[0].samples_per_packet;
       break;
     case 1920000:
+      s->usrp->set_master_clock_rate(30.72e6);
       openair0_cfg[0].samples_per_packet    = 256;
       openair0_cfg[0].tx_sample_advance     = 40;
       openair0_cfg[0].tx_scheduling_advance = 8*openair0_cfg[0].samples_per_packet;

targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.100PRB.usrpb210.conf

@@ -28,7 +28,7 @@ eNBs =
         tdd_config_s            			      = 0;
         prefix_type             			      = "NORMAL";
         eutra_band              			      = 7;
-        downlink_frequency      			      = 2660000000L;
+        downlink_frequency      			      = 2680000000L;
         uplink_frequency_offset 			      = -120000000;
         Nid_cell					      = 0;
         N_RB_DL                 			      = 100;
@@ -36,7 +36,7 @@ eNBs =
         nb_antennas_tx          			      = 1;
         nb_antennas_rx          			      = 1;
         tx_gain                                            = 90;
-        rx_gain                                            = 120;
+        rx_gain                                            = 127;
         prach_root              			      = 0;
         prach_config_index      			      = 0;
         prach_high_speed        			      = "DISABLE";

targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.50PRB.usrpb210.conf

@@ -28,7 +28,7 @@ eNBs =
         tdd_config_s            			      = 0;
         prefix_type             			      = "NORMAL";
         eutra_band              			      = 7;
-        downlink_frequency      			      = 2660000000L;
+        downlink_frequency      			      = 2680000000L;
         uplink_frequency_offset 			      = -120000000;
         Nid_cell					      = 0;
         N_RB_DL                 			      = 50;
@@ -36,7 +36,7 @@ eNBs =
         nb_antennas_tx          			      = 1;
         nb_antennas_rx          			      = 1;
         tx_gain                                            = 90;
-        rx_gain                                            = 118;
+        rx_gain                                            = 130;
         prach_root              			      = 0;
         prach_config_index      			      = 0;
         prach_high_speed        			      = "DISABLE";