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

`sdrrx`	Create receiver System object for Xilinx Zynq-based radio hardware
`sdrtx`	Create transmitter System object for Xilinx Zynq-based radio hardware
`capture`	Capture contiguous RF data using Xilinx Zynq-based radio hardware
`designCustomFilter`	Design custom filter for Analog Devices AD9361/AD9364 RF chip
`info`	Synchronize receiver or transmitter radio settings with radio hardware
`transmitRepeat`	Download waveform signal to radio and repeatedly transmit it over the air

Objects

`comm.SDRRxAD936x`	Receive data from AD936x-based Zynq radio hardware
`comm.SDRRxFMCOMMS5`	Receive data from FMCOMMS5 Zynq radio hardware
`comm.SDRTxAD936x`	Send data to AD936x-based Zynq radio hardware
`comm.SDRTxFMCOMMS5`	Send data to FMCOMMS5 Zynq radio hardware

Blocks

AD936x Receiver	Receive data from AD936x-based Zynq radio hardware
AD936x Transmitter	Send data to AD936x-based Zynq radio hardware
FMCOMMS5 Receiver	Receive data from FMCOMMS5 Zynq radio hardware
FMCOMMS5 Transmitter	Send data to FMCOMMS5 Zynq 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.

Capture Over-The-Air Signals

Record RF signals for post-capture processing in MATLAB^®.

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

QPSK Transmit Repeat Using Analog Devices AD9361/AD9364

Continuously transmit QPSK data using the repeated waveform transmitter functionality.

QPSK Transmitter Using Analog Devices AD9361/AD9364

Transmit QPSK modulated messages onto a carrier with a specified center frequency.

QPSK Receiver Using Analog Devices AD9361/AD9364

Receive and demodulate QPSK modulated messages.

802.11a Transmission and Reception Using Analog Devices AD9361/AD9364

Transmit and receive encoded WLAN packets using a single SDR device.

Diagnostics

Receive Tone Signal Using Analog Devices AD9361/AD9364

Perform a simple loopback of a complex sinusoid signal.

Frequency Offset Calibration Receiver Using Analog Devices AD9361/AD9364

Determine frequency offset between SDR devices using a transmitter and a receiver.

Frequency Offset Calibration Transmitter Using Analog Devices AD9361/AD9364

Determine frequency offset between SDR devices using a transmitter and a receiver.

Troubleshooting

Common Problems and Fixes

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

Featured Examples

Direction of Arrival Estimation Using the MUSIC Algorithm and Analog Devices FMCOMMS5

Receive signal on four channels and calculate the direction of arrival.

Open Script

Transmit and Receive LTE MIMO Using Analog Devices AD9361/AD9364

Generate multi-antenna LTE transmission for simultaneous transmit and receive on a single SDR device.

Capture RF Data to Baseband File Using AD936x-Based Radio Hardware

Save an FM broadcast signal to a file as baseband samples, read the file, and demodulate the baseband samples.

Open Live Script

Frequency Offset Calibration Using Analog Devices AD9361/AD9364

Determine frequency offset between SDR devices using a transmitter and a receiver model.

Open Model

LTE Transmitter Using Analog Devices AD9361/AD9364

Generate and transmit LTE waveform on an SDR device.

LTE Receiver Using Analog Devices AD9361/AD9364

Decode MIB and recover basic system information from LTE waveform received from an SDR device.