The Fast Fourier Transform (FFT) is an algorithm that computes the Discrete Fourier Transform (DFT) and its inverse efficiently. The DFT is a mathematical transformation used to analyze the frequency content of discrete signals, transforming a sequence of complex numbers into another sequence of complex numbers. The basic idea is to express a discrete signal as a sum of sinusoids, which can provide insights into the signal's frequency characteristics.

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  1. Digital signal processing
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Fast Fourier transform by Ciro Santilli 37 Updated 2025-07-16
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An efficient algorithm to calculate the discrete Fourier transform.
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