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changing frequency of a time domain signal by either frequency multiplication or frequency division

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Limei Cheng
Limei Cheng el 19 de Sept. de 2022
Comentada: Chunru el 19 de Sept. de 2022
I have a periodical signal with period of 1 sec (and samling rate Fs=1000 HZ). Now, I'd like to use FFT and iFFT to change the period of the signal such that the period could be 1.2 sec or 0.8 second.
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Star Strider
Star Strider el 19 de Sept. de 2022
Movida: Star Strider el 19 de Sept. de 2022
The easiest way to do this is with the resample function. The interpft function already does what you want to do.
Chunru
Chunru el 19 de Sept. de 2022
How about just change sampling frequency from 1000 to 1000/1.2 or 1000/0.8 so that the original signal of 1sec period becomes 1.2 sec and 0.8sec?

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