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General Purpose FFT (Fast Fourier/Cosine/Sine Transform)
Short Fourier Transform for a non periodical signal
fft.c - fast Fourier transform and its inverse (both recursively)
Computing-the-2-D Discrete-Fourier-Transform IEEE article
A 64 points Discrete Fourier Transform code in AVR asm.
Improved Instantaneous Frequency Estimation Using an Adaptive Short-Time Fourier Transform
A implementation of the discrete Fourier transform in visual basic classic.
A short-time Fourier transform based symbol timing approach for OFDM systems