DTFT & DFT: Discrete Cosine

This demo shows the Discrete-Time Fourier Transformation (DTFT) \(X(\mathrm{e}^{\mathrm{j}\Omega})\) as well as the Discrete Fourier Transformation (DFT) \(X[\mu]\) of a cosine signal \(x[k]=\cos(\omega k)\) with the adjustable frequency \(\omega\in[0,\pi]\) and DFT-length \(M\in[2,1024]\).