'2 dft' presentation slideshows

? 3 ? FFT ??????

? 3 ? FFT ??????. 3.1 ?? 3.2 ???? DFT ????????? 3.3 ?????? DIT ??? 2-FFT ?? 3.4 ?????? DIF ??? 2-FFT ?? 3.5 N ????? FFT ?? 3.6 ???? Z ??? Chirp-Z ????? 3.7 ?? FFT ?????????? 3.8 FFT ?????. 3.2 ???? DFT ?????????. 3.2.1 ???? DFT ??????. ??????????????? 1/N.

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??? ??????? ? FFT ?

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Fast Fourier Transform

Fast Fourier Transform. Fourier ?? :. ????? :. Jean Baptiste Joseph Fourier (1768 - 1830). ??? :. ? g(x) ????. 1. d ( t ). w. t. delta ??. TopHat ??. cos( w 0 t ). w. t. +w 0. -w 0. 0. 0. cosine ??. sine ??. ???? :. ???? :. -a. a.

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Fast Fourier Transform

Fast Fourier Transform. ? ? ???????????. Fast Fourier Transform. The Fast Fourier Transform (FFT) is a very efficient algorithm for performing a discrete Fourier transform

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Fast Fourier Transform (FFT)

Fast Fourier Transform (FFT) Problem : we need an efficient way to compute the DFT. The answer is the FFT. Consider a data sequence and its DFT:.

418 views • 11 slides