![]() ![]() ![]() The DFT is obtained by decomposing a sequence of values into components of different frequencies. Fourier analysis converts a signal from its original domain (often time or space) to a representation in the frequency domain and vice versa. A discrete Fourier analysis of a sum of cosine waves at 10, 20, 30, 40, and 50 HzĪ fast Fourier transform ( FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT).
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