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 Fourier Transform @ Wikipedia
In mathematics, the Fourier transform, named in honor of French mathematician Joseph Fourier, is a certain linear operator that maps functions to other functions.
Loosely speaking, the Fourier transform decomposes a function into a continuous spectrum of its frequency components, and the inverse transform synthesizes a function from its spectrum of frequency components.
A useful analogy is the relationship between a series of pure notes (the...
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http://en.wikipedia.org/wiki/Fourier_transform
9/3/2007
Tags: fft
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