Digital Signal Processing with Examples in MATLAB, 2nd Edition

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Introduction

1.1    Digital Signal Processing

Digital signal processing (DSP) has become an established area of electrical and computer engineering in relatively recent times. In fact, because all types of signals, when they are processed, are now most often processed in digital form, scientists and engineers in all disciplines have come to at least a nodding acquaintance with the subject in order to understand what their instruments and displays are trying to tell them.

Compared with other areas of electrical engineering that share their analytic tools with DSP, such as fields and waves, communication theory, circuits, and control theory, DSP has a relatively short history, a relatively rapid growth, and astonishing diversification ...