Fast Fourier Transform Question in Matlab

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John
John 2013 年 3 月 14 日
I have a signal with 8192 samples with lots of intermittent 0s. I want to compute the FFT of this signal however I don't want to use all of these 0s.
How can I shorten the original signal to get rid of these 0s and compute a FFT that is equivalent to the original signal?

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回答 (1 件)

Azzi Abdelmalek
Azzi Abdelmalek 2013 年 3 月 14 日
You can use sparse function
y=rand(1,8192);
yout=sparse(y)
But to compute the fft you will need to use y, unless you use your own code

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