real-time FFT in simulink

Hello,

anyone here knows how to model a real-time FFT in simulink?

Thanks,

Answer 1

[Sufiyan]

Hi,

Here are the steps to create the model.

1. Open a new Simulink model.
2. From the Simulink Library Browser, open the "DSP System Toolbox" library.
3. Drag the "FFT" block into the model.
4. Connect the input signal to the "FFT" block.
5. Set the FFT length parameter to desired number of samples. This should always be a power of 2.
6. Connect the output of the "FFT" block to a "Spectrum Analyzer" block, which can be found in the "DSP System Toolbox" library. This block will display the frequency spectrum of the input signal in real-time.
7. Configure the "Spectrum Analyzer" block as needed to set the frequency range, sample rate, and other parameters of the display.

You can refer to FFT block for more information to set parameters.

Hope this helps!

Answer 2

[Mohammad Ali Sadeghian]

Dear Sufiyan,

Many thanks for your prompt reply,

May i ask you that is possible to write a function to obtain an online fft frequency tracking in simulink?

Thanks

Ali