How to convert a square wave to frequency domain in Matlab or simulink

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yingcheng zan 2020-6-25

0
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https://ww2.mathworks.cn/matlabcentral/answers/554374-how-to-convert-a-square-wave-to-frequency-domain-in-matlab-or-simulink

评论： yingcheng zan 2020-7-9

Hi all,

I am so grateful, if you can give me some hints and advice for this issue.

I read a analog signal from my Arduino which is a square wave signal. I would like to obtain the frequency of this signal to do further control work. However, I do not know how to obtain it.

(1) I found some models with FFT function in simulink, but the input signal is DSP sine wave signal in these models. If I replace the input signal (DSP sine wave) with the square wave obtained from Arduino, these models will not work.

(2) If I do it in Matlab rather than Simulink, which fuction is valid in this case? And how can I convert the continuous signal in to frequency domain (or just get the value of the frequency) in Matlab?