Signal generator in matlab simulink
- #SIGNAL GENERATOR IN MATLAB SIMULINK HOW TO#
- #SIGNAL GENERATOR IN MATLAB SIMULINK GENERATOR#
- #SIGNAL GENERATOR IN MATLAB SIMULINK SOFTWARE#
- #SIGNAL GENERATOR IN MATLAB SIMULINK CODE#
In the Waveform app, you can see that I have prepopulated an OFDM signal with some zero value pilots, giving a notch in the spectrum. To open the app, browse the available apps on the MATLAB toolstrip and select Wireless Waveform Generator.
#SIGNAL GENERATOR IN MATLAB SIMULINK GENERATOR#
To do this, I will use the Waveform Generator app, which lets you generate, impair, visualize, and export modulated waveforms, including OFDM, QAM, PSK, and WLAN. Next, I will generate and transmit a custom OFDM waveform.
In a matter of a couple of minutes, I have generated and transmitted a fully standard-compliant WLAN waveform onto the air. You can see the sporadic beacon signals being transmitted, and, zooming in on the access point list on my laptop, you can see the TEST BEACON that has been transmitted. Next, I resample my waveform to match my receiver sampling rate of 40MHz and call a single method on my transmitter object, which will download the waveform to my SDR device and transmit it repeatedly onto the air. I simply set the minimum set of parameters namely, sampling rate, center frequency, and gain. Next, I create the transmitter object I will use to configure the SDR device and transmit my waveform. The script returns a waveform sampled at 20MHz and configured to transmit at 5.3GHz. Returning to the MATLAB prompt, I will now generate my WLAN waveform with a prewritten script which is built on WLAN Toolbox functionality. You can see some form of signal being transmitted 15MHz below my center frequency. Simply clicking play on this model will start the reception of samples from my attached hardware and display the spectrum analyzer. Note that this spectrum display can also easily be achieved in MATLAB. Looking at the receiver block parameters, I will configure the SDR device to sample at a sampling rate of 40MHz at a center frequency of 5.3GHz. Let’s start by opening a simple Simulink model that we will use to display the real-time received spectrum.
#SIGNAL GENERATOR IN MATLAB SIMULINK HOW TO#
Then I will show you how to use the Waveform Generator app to generate and transmit a fully custom OFDM waveform. First, I will show you how to use WLAN Toolbox to generate and transmit an 802.11 beacon signal. This video shows you how to generate and transmit standards-compliant and custom waveforms using MathWorks toolboxes and SDR connectivity. The spectrum analysis setup from before is used in parallel to see the OFDM signal being transmitted in real time. Some null pilot signals are easily inserted to give the spectrum a distinctive shape before the signal is again loaded onto the attached SDR hardware and transmitted onto the air. Next, a fully custom OFDM waveform is generated using the Communications Toolbox Waveform Generation App. In parallel, Simulink ® is used to show how the spectrum of the transmitted signal can be viewed in real time. It is shown how the beacon signal appears on a laptop display as it scans for WiFi networks.
The signal is then repeatedly transmitted onto the air. The SDR hardware is easily configured with a simple MATLAB object, and the generated signal is loaded onto the connected SDR hardware.
#SIGNAL GENERATOR IN MATLAB SIMULINK CODE#
First, a few lines of MATLAB code from WLAN Toolbox™ are used to generate a fully standard-compliant WLAN beacon signal.
In parallel, the signal can be received and easily visualized, so the channel effects are visible on the received signal. Using a simple-to-use MATLAB ® interface, any signal can be generated and downloaded onto the SDR hardware, from where it is repeatedly transmitted over the air.
#SIGNAL GENERATOR IN MATLAB SIMULINK SOFTWARE#
The Pluto Radio and Xilinx ® Zynq ®-Based Radio support packages from Communications Toolbox™ can be used to repeatedly transmit arbitrary signals onto the air using Software Defined Radio (SDR) hardware.