This book offers an extended description of continuous-time signals related to signals and systems. As a time-varying process of any physical state of any object, which serves for representation, detection, and transmission of messages, a modern electrical signal possesses, in applications, many specific properties. The text covers principle foundations of signals theory. Presenting bandlimited and analytic signals, the book reviews the methods of their description, transformation (by Hilbert transform), and sampling.

Preface.- 1. Introduction.- 2. Spectral Presentation of Signals.- 3. Signal Modulation.- 4. Signals Energy and Correlation.- 5. Bandlimited Signals.- A. Tables of Fourier series and transform properties. B. Tables of Fourier series and transform of basic signals. C. Tables of Hilbert transform and properties. D. Mathematical formulas.- References. Index.