Four Shades of Fourier
The family reunion: the Fourier series, the Fourier transform, the DTFT and the DFT — and the five bridges that connect them, all built from one law: discrete in one domain means periodic in the other.
The family reunion: the Fourier series, the Fourier transform, the DTFT and the DFT — and the five bridges that connect them, all built from one law: discrete in one domain means periodic in the other.