Radio I/O

Transmit and receive real-world RF signals

When transmitting or receiving real-world RF signals, use I/O properties and techniques to perform single and multichannel I/O, detect lost samples, apply burst mode buffering, and repeatedly transmit a waveform.

Functions

sdrrxCreate receiver System object for USRP® embedded series radio hardware
sdrtxCreate transmitter System object for USRP® embedded series radio hardware
designCustomFilterDesign custom filter for Analog Devices AD9361 RF chip
infoSynchronize receiver or transmitter radio settings with radio hardware
transmitRepeatDownload waveform signal to radio and repeatedly transmit it over the air

Blocks

E310 Receiver Receive data from USRP® E310 or USRP® E312 radio hardware
E310 TransmitterSend data to USRP® E310 or USRP® E312 radio hardware

System Objects

comm.SDRRxE310Receive data from USRP® E310 or USRP® E312 radio hardware
comm.SDRTxE310Send data to USRP® E310 or USRP® E312 radio hardware

Topics

Radio I/O Properties and Techniques

Channel I/O

Overview of available radio channels to send and receive data.

Repeated Waveform Transmitter

Use a transmitter System object™ for repeated signal transmission.

SDR Receiver Sample Times

Set sample times in receiver blocks or receiver System objects.

Data Frame Lengths

Set data frame length in receiver blocks or receiver System objects.

Detect Underruns and Overruns

Detect underruns and overruns using the lost sample indicator.

Burst Mode

To achieve real time performance, enable burst mode.

Apply Conditional Execution

To determine whether you receive valid data from the radio hardware, apply conditional execution.

Digital Modulation

Transmission of a QPSK Waveform Using USRP® E310

This example shows how to use the USRP® Embedded Series Radio Support Package with Simulink® to implement a QPSK transmitter.

Reception of a QPSK Waveform Using USRP® E310

This example shows how to use the USRP® Embedded Series Radio Support Package and Communications Toolbox™ software to implement a QPSK receiver in Simulink®.

Transmission and Reception of an Image Using WLAN Toolbox and a Single USRP® E310

This example shows how to transmit and receive WLAN packets on a single radio platform, USRP® Embedded Series Radio Support Package with MATLAB® and WLAN Toolbox™.

Diagnostics

Frequency Offset Calibration Receiver Using USRP® E310

This example shows how to use the USRP® Embedded Series Radio Support Package with MATLAB® to determine the frequency offset between SDR devices using USRP® E310.

Frequency Offset Calibration Transmitter Using USRP® Embedded Series

This example shows how to use the USRP® Embedded Series Radio Support Package with MATLAB® to determine the frequency offset between SDR devices.

Troubleshooting

Common Problems and Fixes

Resolve issues encountered during installation or while using the I/O mode features of the support package.

Featured Examples