books.google.co.in - Covers the analysis and representation of discrete-time signals and systems, including discrete-time convolution, difference equations, the z-transform, and the discrete-time Fourier transform. Emphasis is placed on the similarities and distinctions between discrete-time and continuous-time signals and...http://books.google.co.in/books/about/Digital_signal_processing.html?id=vfdSAAAAMAAJ&utm_source=gb-gplus-shareDigital signal processing
