Digital signal processing concepts

Within the last few years, digital techniques have been extensively applied to the solution of signal processing problems. This paper briefly examines the relative merits of analog and digital signal processing techniques and then considers the conceptual issues involved in formulating the solution to a signal processing problem as a digital signal processor. Issues considered are the representation of a digital processor by a difference equation, formal solution of the difference equation, the system function corresponding to the processor, as well as the frequency response of the system.