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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
`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.

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

This example shows how to use the Repeated Waveform Transmitter feature of the Xilinx® Zynq-Based Radio Support Package with Analog Devices AD9361/AD9364 to continuously transmit QPSK data.

QPSK Transmitter Using Analog Devices AD9361/AD9364

This example shows how to use the Xilinx® Zynq-Based Radio Support Package with Simulink® to implement a QPSK transmitter.

QPSK Receiver Using Analog Devices AD9361/AD9364

This example shows how to use the Xilinx® Zynq-Based Radio Support Package and Communications Toolbox™ software to implement a QPSK receiver in Simulink®.

802.11a Transmission and Reception Using Analog Devices AD9361/AD9364

This example shows how to transmit and receive WLAN packets on a single SDR platform, using Xilinx® Zynq-Based Radio Support Package with MATLAB® and WLAN Toolbox™.

Diagnostics

Receive Tone Signal Using Analog Devices AD9361/AD9364

This example shows how to use the Xilinx® Zynq-Based Radio Support Package and Communications Toolbox™ software to perform a simple loopback of a complex sinusoid signal at RF Using Analog Devices™ AD9361/AD9364.

Frequency Offset Calibration Receiver Using Analog Devices AD9361/AD9364

This example shows how to use the Xilinx® Zynq-Based Radio Support Package with MATLAB® to determine the frequency offset between SDR devices using Analog Devices™ AD9361 and AD9364.

Frequency Offset Calibration Transmitter Using Analog Devices AD9361/AD9364

This example shows how to use the Xilinx® Zynq-Based 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

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

Receive signal on four channels and calculate the direction of arrival using features from the Phased Array System Toolbox™.

Open Script

Transmit and Receive LTE MIMO Using a Analog Devices AD9361/AD9364

Use the Communications Toolbox™ Support Package for Xilinx® Zynq-Based Radio Support Package with MATLAB® and LTE Toolbox™ to generate a multi-antenna LTE transmission for simultaneous transmit and receive on a single SDR platform. An image file is encoded and packed into a radio frame for transmission, and subsequently decoded on reception. The following illustration is a conceptual overview of this setup:

Frequency Offset Calibration Using Analog Devices AD9361/AD9364

Use the Xilinx® Zynq-Based Radio Support Package with Simulink® to determine the frequency offset between SDR devices. The transmitter sends a 10 kHz sine wave with the Frequency Offset Calibration (Tx) Using Analog Devices AD9361/AD9364 model. The receiver receives the signal, calculates the frequency offset and displays the offset in the Frequency Offset Calibration (Rx) Using Analog Devices™ AD9361/AD9364 model.

Open Model

LTE Transmitter Using Analog Devices AD9361/AD9364

Use the Xilinx® Zynq-Based Radio Support Package with MATLAB® and LTE Toolbox™ to generate an LTE transmission. The transmitted signal can be received by the companion LTE Receiver Using Analog Devices AD9361/AD9364 example if you have a second SDR platform.

LTE Receiver Using Analog Devices AD9361/AD9364

Use the Xilinx® Zynq-Based Radio Support Package with MATLAB® and LTE Toolbox™ to decode the master information block (MIB) and recover basic system information from an LTE waveform. A suitable signal for reception can be generated by the companion LTE Transmitter with Analog Devices™ AD9361/AD9364 example if you have a second SDR platform.