Digital signal processing (DSP) is the mathematical manipulation of an information signal to modify or improve it in some way. It is characterized by the representation of discrete time, discrete frequency, or other discrete domain signals by a sequence of numbers or symbols and the processing of these signals.

## Signals and Systems – Simon S. Haykin, Barry Van Veen – 2nd Edition

The study of signals and systems is basic to the discipline of electrical engineering at all levels. It is an…