The main types of signals, power amplifiers and oscillation generators, the basics of the theory of auto-generators, parasitic oscillations and side emissions of transmitters are considered. Described are signal generation, structural diagrams of transmitting systems of digital cellular and trunking communication, systems of wireless subscriber access, satellite and radio relay communication. Examples of calculations are given for the most methodically complex issues. For students of higher educational institutions studying in the specialties of radio engineering.