FFT Digital Signal Processing--DFT/FFT Algorithms The discrete Fourier transform plays an important role in many applications of digital signal processing,including linear filtering,correlation analysis,and spectrum analysis.The major reason is the existence of efficient algorithms for computing the DFT. A divide-and-conquer approach in which a DFT of size N,where N is a composite number,is reduced to the computation of smaller DFTs from which the larger DFT is computed.Particularly for N=2B. A linear filtering operation on the data,this approach has two algorithms:the Goertzeland the chirp-z transform algorithms. 上游充通大Digital Signal Processing—— DFT/FFT Algorithms FFT  The discrete Fourier transform plays an important role in many applications of digital signal processing, including linear filtering, correlation analysis, and spectrum analysis. The major reason is the existence of efficient algorithms for computing the DFT.  A divide-and-conquer approach in which a DFT of size N, where N is a composite number, is reduced to the computation of smaller DFTs from which the larger DFT is computed. Particularly for N=2B.  A linear filtering operation on the data, this approach has two algorithms: the Goertzeland the chirp-z transform algorithms