matlab-transmit-capture-usrp

Create a basebandTransceiver object from a saved radio configuration, set the sample rate, center frequencies, and gains, then call transmit with your normalized waveform and capture with a duration such as milliseconds(10). The capture function returns IQ data, a timestamp, and a dropped-samples flag.

basebandTransceiver handles transmit, capture, or both and is the default choice for most workflows. basebandTransmitter and basebandReceiver are standalone single-direction objects used when separate scripts need independent TX or RX control, and they use unprefixed property names like RadioGain and CenterFrequency.

Wireless Testbench supports NI USRP X410, X310, N310, N320, N321, N300, X300, and E320 radios. Each device has different antenna port names and onboard buffer capacities, which affect multi-antenna configuration and maximum capture duration.

The CaptureDataType property defaults to int16, and most MATLAB signal-processing functions like fft, filter, and pwelch do not accept complex int16 data. Set CaptureDataType to "double" before capturing, or cast the data with double(data) afterward.

Set UseRadioBuffer=false to stream samples directly to the host over the network, enabling arbitrarily long captures. Onboard buffer limits range from about 8.7 seconds on X300/X310 to 34.8 seconds on X410 at 30.72 MHz, and direct-to-host requires sustained network throughput.

Dropped samples occur when the host or network cannot sustain the required throughput. Run radioSetupWizard to optimize host network settings, reduce the sample rate or antenna count, or use the default radio buffer mode instead of direct-to-host streaming.