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I have some samples that are read from a square pulse wave and I'm looking for a way to find the characteristics of this wave.

It's a pulse wave, let $T_1$ be the non-pulse duration and $T_2$ to be the pulse duration, usually $T_1$ is bigger than $T_2$.

I would like to know the base frequency, e.g., the frequency that includes $T_1+T_2$. Can I do this using an FFT?

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Of course. Sample a few cycles, window, and do a FFT. The highest peak will be found at the base frequency (T1+T2) of your wave. With "spectral reassignment" you might get more precise results.

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  • $\begingroup$ Will it work with square wave ? $\endgroup$ – ApriOri Dec 31 '13 at 7:41
  • $\begingroup$ Certainly. A square wave will have ,,overtones'' at multiples of the base frequency, but the base frequency will have maximum amplitude. $\endgroup$ – user7358 Dec 31 '13 at 12:52

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