Partial Fast Fourier Transform Matlab script

Publisher review:
Partial Fast Fourier Transform - Fast computation of part of an FFT using fractional fourier transform This program uses the fractional fourier transform to compute only part of the FFT. It is even faster if the signal is sparse (i.e. it contains only a few non-zero elements).Example:signal=rand(16,1);ft=FPFT(signal,1024,64);This computes the first 64 points of the FFT of signal, signal is padded with zeroes to length 1024 first. This is much faster thanft=FFT(signal,1024);ft=ft(1:64);FPFT uses a caching mechanism to improve speed for multiple calls. Requirements: · MATLAB Release: R13SP1
Operating system:
Windows / Linux / Mac OS / BSD / Solaris

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