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Results tagged with fft
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user 1184
The fast Fourier transform is an efficient algorithm to compute the discrete Fourier transform (DFT) and its inverse.
12
votes
Why should I zero-pad a signal before taking the discrete Fourier transform?
In general zero-padding prior to DFT is equivalent to interpolation, or sampling more often, in the transformed domain.
Here is a quick visualization of how the opposite works. If you sample a bandli …
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