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FFT (other)
A fast Fourier transform is a numerical algorithm used in signal processing. FFT may also refer to: Games * ''Final Fantasy Tactics'', a video game * ''A Fistful of TOWs'', a miniatures wargame * Fédération Française de Tarot, the French tarot federation Sport * Fédération Française de Tennis, the French Tennis Federation * Firefighters Upsala CK, a Swedish cycling team * Football Federation Tasmania, a football organisation in Australia *Four Four Two (4-4-2), a Formation (association football)#4–4–2, football formation **''FourFourTwo'', a football magazine **FourFourTwo (TV series), ''FourFourTwo'' (TV series), an Asian football TV series **4-4-2, a band formed to record the song "Come on England" for the England football team for the Euro 2004 championship * Tajikistan Football Federation (Tajik: ') Science and technology * 2,1-fructan:2,1-fructan 1-fructosyltransferase * Faculty of Food Technology, Latvia University of Agriculture * Final-Form Text, part of IBM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fast Fourier Transform
A fast Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT). Fourier analysis converts a signal from its original domain (often time or space) to a representation in the frequency domain and vice versa. The DFT is obtained by decomposing a sequence of values into components of different frequencies. This operation is useful in many fields, but computing it directly from the definition is often too slow to be practical. An FFT rapidly computes such transformations by factorizing the DFT matrix into a product of sparse (mostly zero) factors. As a result, it manages to reduce the complexity of computing the DFT from O\left(N^2\right), which arises if one simply applies the definition of DFT, to O(N \log N), where N is the data size. The difference in speed can be enormous, especially for long data sets where ''N'' may be in the thousands or millions. In the presence of round-off error, many FFT algorithm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
