Wireless Waveform Generator

Create, impair, visualize, and export modulated waveforms

Description

The Wireless Waveform Generator app enables you to create, impair, visualize, and export modulated waveforms.

Using this app you can:

  • Generate custom OFDM, QAM, and PSK modulated waveforms.

  • Generate sine wave test waveforms.

  • Generate Bluetooth modulated waveforms. This feature requires the Communications Toolbox™ Library for the Bluetooth® Protocol. To download this library, go to Get Add-Ons (MATLAB).

  • Generate WLAN (802.11™) modulated waveforms. This feature requires the WLAN Toolbox.

  • Generate LTE modulated waveforms. This feature requires the LTE Toolbox.

  • Distort the waveform by adding RF impairments such as AWGN, phase offset, frequency offset, DC offset, IQ imbalance, and memoryless cubic nonlinearity.

  • Visualize the waveform in constellation diagram, spectrum analyzer, OFDM grid, and time scope plots.

  • Export the waveform to your workspace as a structure, to a .mat or a .bb file, or to a runnable MATLAB® script.

    Note

    You can use the MATLAB script to reproduce your waveform outside of the Wireless Waveform Generator app.

  • Generate a waveform that you can transmit using a connected lab test instrument. The Wireless Waveform Generator app can transmit using instruments supported by the rfsiggen function. Use of the transmit feature in the Wireless Waveform Generator app requires Instrument Control Toolbox.

For more information, see Using Wireless Waveform Generator App.

Open the Wireless Waveform Generator App

  • MATLAB Toolstrip: On the Apps tab, under Signal Processing and Communications, click the app icon,

  • MATLAB command prompt: Enter wirelessWaveformGenerator

Examples

expand all

Open the Wireless Waveform Generator app and generate the default waveform by clicking Generate. The displayed waveform is an OFDM waveform with QPSK-modulated symbols.

Click Insert DC null and increase the Guard band subcarriers to [20:19]. Click Generate again. The plotted waveform changes to reflect the updated configuration.

Open the Wireless Waveform Generator app and configure a 16-QAM waveform. Specify a phase imbalance of 11.25 degrees (pi/16 radians) and an amplitude imbalance of 1.5 dB. Click Generate to generate the waveform.

Select the Filtering parameter and apply root raised cosine filtering. Click Generate again to generate a waveform using the current configuration. The plotted waveform changes to reflect the updated configuration.

Open the Wireless Waveform Generator app and configure a Bluetooth low energy (BLE) waveform. To use the BLE feature, the app requires Communications Toolbox Library for the Bluetooth Protocol . In the Waveform Type section, click Bluetooth Low Energy. Change the bit source to User-defined and enter the input bits. Specify the value of Samples per symbol as 32. Click Generate to generate the BLE waveform. The plotted waveform is a BLE waveform with GMSK-modulated samples. Change the visible plots by clicking Visualize and then selecting one or more options between Constellation Diagram, Time Scope and Eye Diagram.

Related Examples

Introduced in R2018b