Within the framework of the study course students are provided information on such topics as classification of signals and systems; models of signals, signal spaces; representation of signals by sets of orthogonal functions: complex exponentials, Walsh, Haar, Laguerre functions, wavelets; short-time Fourier, Hilbert transforms; transformations of narrowband signals by bandpass systems; optimum filtering, matched filters, Viener, Kalman filtering; spread spectrum signals, multicarrier signals; nonlinear dynamical systems, chaos.