ABSTRACT
This chapter discusses elements of continuous-time signal processing techniques. The mathematical language used in describing continuous-time signals is explained. Terms such as linearity, time-invariance, impulse response, causality, and stability are introduced. These terms are explained within the context of continuous-time signal processing. Certain filter characteristics are also specified. A system (filter) can actually be specified via an input function and a corresponding output function. A filter is simply a system. It transforms an input signal to its output signal. Filters are generally classified in terms of their frequency characteristics. Commonly used filters are low-pass, high-pass, band-pass, and band-stop filters.
