hdlcoder.sdr

R2026b

Create transmitter and receiver for AD936x-based software-defined radio hardware

Since R2024a

Use of this System object™ is not recommended. Use the sdrtx and sdrrx functions instead. For more information, see Version History.

Description

Add-On Required: This feature requires the SoC Blockset Support Package for AMD FPGA and SoC Devices add-on.

The hdlcoder.sdr System object is a signal source that transmits and receives data from an AD936x-based software-defined radio (SDR) hardware device. Use this object to simulate and develop various SDR applications.

To use this object, when setting up the hardware in Hardware Setup, select Xilinx^® Zynq^® ZC706 Evaluation Kit with Analog Devices^® FMCOMMS2/3/4 RF card.

To transmit and receive data from the radio hardware:

1. Create the hdlcoder.sdr object and set its properties.

2. Call the object with arguments, as if it were a function.

To learn more about how System objects work, see What Are System Objects?

Creation

Syntax

sdrTxRx = hdlcoder.sdr("Device")

sdrTxRx = hdlcoder.sdr('Device',Name=Value)

Description

sdrTxRx = hdlcoder.sdr("Device") creates a transmitter and receiver System object with default properties for the specified hardware device.

Example: sdrTxRx = hdlcoder.sdr('AD936x');

sdrTxRx = hdlcoder.sdr('Device',Name=Value) creates a transmitter and receiver object using one or more name-value arguments. You can specify additional name-value arguments in any order as (Name1,Value1,...,NameN,ValueN). If you do not specify a property, it uses the default value.

Example: sdrTxRx = hdlcoder.sdr('AD936x',CenterFrequency=2.4e9,BasebandSampleRate=3.8e6);

Properties

Unless otherwise indicated, properties are nontunable, which means you cannot change their values after calling the object. Objects lock when you call them, and the release function unlocks them.

If a property is tunable, you can change its value at any time.

For more information on changing property values, see System Design in MATLAB Using System Objects.

IPAddress — IP address of radio device

'192.168.3.2' | character vector

Internet Protocol (IP) address of the radio device, specified as character vector.

This value must match the physical IP address of the radio hardware assigned during hardware setup. If you configure the radio hardware with an IP address other than the default address, update IPAddress accordingly.

Example: sdrTxRx = hdlcoder.sdr('AD936x',IPAddress='192.168.3.2');

Data Types: char | string

CenterFrequency — RF center frequency setting in Hz

2.4e9 (default) | nonnegative finite scalar

RF center frequency setting in Hz, specified as a nonnegative finite scalar.

Example: sdrTxRx = hdlcoder.sdr('AD936x',CenterFrequency=2.4e9);

Tunable: Yes

Data Types: double

ChannelMapping — Channel output mapping

Read-only: 1 (default) | 2 | [1 2]

This property is read-only.

Channel output mapping, specified as one of these values:

• 1 — Only channel 1 is in use.

• 2 — Only channel 2 is in use.

• [1 2] — Both channels are in use.

The RF chip of the radio hardware determines the number of channels you can use for receiving data.

Supported Radio Hardware	RF Chip	Number of Channels	Supported RF Ports
ZC706 and FMCOMMS2 or FMCOMMS3	AD9361	2	TX1A, RX1A, TX2A, RX2A
ZC706 and FMCOMMS4	AD9364	1	TXA, RXA

BasebandSampleRate — Baseband sampling rate

1.0e6 (default) | scalar

Baseband sampling rate in Hz, specified as a scalar.

Example: sdrTxRx = hdlcoder.sdr('AD936x',BasebandSampleRate=3.0e6);

Data Types: double

TxGain — Radio transmitter gain

-10 (default) | scalar

Radio transmitter gain in dB, specified as a scalar.

Example: sdrTxRx = hdlcoder.sdr('AD936x',TxGain=-10);

Tunable: Yes

Data Types: double

RxGain — Radio receiver gain

4 (default) | scalar

Receiver gain in dB, specified as a scalar.

Example: sdrTxRx = hdlcoder.sdr('AD936x',RxGain=10);

Tunable: Yes

Data Types: double

SamplesPerFrame — Number of samples per frame

20,000 (default) | positive integer

Number of samples per frame, specified as an even positive integer.

Example: sdrTxRx = hdlcoder.sdr('AD936x',SamplesPerFrame=2048);

Data Types: double

Object Functions

To use an object function, specify the System object as the first input argument. For example, to release system resources of a System object named obj, use this syntax:

release(obj)

Common to All System Objects

setup	One-time set up tasks for System objects
release	Release resources and allow changes to System object property values and input characteristics
reset	Reset internal states of System object

Examples

Configure AD936x-based Radio Hardware with Default Settings

Create a transmitter and receiver system object for the AD936x-based Zynq radio hardware with the default properties. Make sure that the hardware board is connected to your computer.

sdrTxRx = hdlcoder.sdr('AD936x')

sdrTxRx = 

  hdlcoder.sdr with properties:

            DeviceName: 'AD936x'
             IPAddress: '192.168.3.2'
       CenterFrequency: 2.4000e+09
                TxGain: -10
                RxGain: 4
    BasebandSampleRate: 1000000

Configure and Set Up AD936x-based Radio Hardware

Create a transmitter and receiver system object for the AD936x-based Zynq radio hardware with the specified properties. Make sure that the hardware board is connected to your computer.

sdrTxRx = hdlcoder.sdr('AD936x', ...
    IPAddress = '192.168.3.2',...
    CenterFrequency = 2.4e9,...
    ChannelMapping = [1 2],...
    BasebandSampleRate = 3840000,...
    TxGain = -10,...
    RxGain = 1,...
    SamplesPerFrame = 2048);

sdrTxRx = 

  hdlcoder.sdr with properties:

            DeviceName: 'AD936x'
             IPAddress: '192.168.3.2'
       CenterFrequency: 2.4000e+09
                TxGain: -10
                RxGain: 1
    BasebandSampleRate: 3840000

Setup the sdrTxRx system object.

setup(sdrTxRx);

## Establishing connection to hardware. This process can take several seconds.
## Establishing connection to hardware. This process can take several seconds.

After the setup completes, you can transmit and receive the data from the AD936x-based Zynq radio hardware. For more information, see Use FPGA I/O to Communicate with FPGA on Zynq-Based Radio by Using MATLAB (HDL Coder).

Version History

Introduced in R2024a

R2026b: hdlcoder.sdr will be removed

The hdlcoder.sdr System object will be removed in a future release. Use the sdrtx and sdrrx functions instead. The System object now returns this warning message when you use it:

hdlcoder.sdr will be removed in a future release. To create transmitter and receiver System objects, use sdrtx and sdrrx functions instead. For an example:

For transmitter: tx = sdrtx('AD936x', ...)
For receiver: rx = sdrrx('AD936x', ...)