Transform-Domain Representation of Discrete-Time Signals Three useful representations of discrete-time sequences in the transform domain v Discrete-time Fourier Transform DTFT Discrete Fourier Transform DFT z-ransform Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 1 Transform-Domain Representation of Discrete-Time Signals • Three useful representations of discrete-time sequences in the transform domain: ✓Discrete-time Fourier Transform (DTFT) ✓Discrete Fourier Transform (DFT) ✓z-Transform