Thursday, October 27, 2011

Matlab - FFT and Zero Padding | blinkdagger

Matlab - FFT and Zero Padding | blinkdagger: "Conclusion
It is a common misconception that zero-padding adds more information. Zero padding adds NO NEW information. The perceived benefit of zero-padding is increased spectral resolution. You are getting better resolution, but the key is to realize that there is NO NEW information added from the zero-padding. Zero-padding is useful, but it should not be a substitute for taking larger data samples. If you had to choose between taking twice as much data, or to zero pad your data, the answer is to ALWAYS take more data.

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