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

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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 2022 年 9 月 19 日
移動済み: Star Strider 2022 年 9 月 19 日
The easiest way to do this is with the resample function. The interpft function already does what you want to do.
Chunru
Chunru 2022 年 9 月 19 日
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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