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How to find the FFT of a variable frequency sinusoidal signal in Simulink
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I generated a sinusoidal signal with 3 frequencies (5, 10, 15 Hz) using the following method:
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I tried to find the FFT of this signal with:
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but the spectrum was nothing like what it's supposed to be, so what is the correct the way to find it (is the generating method correct or is there a better way)?
Thanks.
3 个评论
Mathieu NOE
2024-3-11
I haven't used this demo example, but it's purpose is to do a single fft computation for a fixed frequency signal
I suppose that you want to create multiple fft spectra for a variable frequency signal (as you would do to plot a spectrogram), so you have to change a bit the logic
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