For senior/graduate-level courses in Discrete-Time Signal Processing. THE definitive authoritative text on DSP - ideal for those with an introductory-level knowledge of signals and systems. Written by prominent DSP pioneers it provides thorough treatment of the fundamental theorems and properties of discrete-time linear systems filtering sampling and discrete-time Fourier Analysis. By focusing on the general and universal concepts in discrete-time signal processing it remains vital and relevant to the new challenges arising in the field.