The manual covers the main types of radio engineering systems (PTC), gives a classification of PTC according to the frequencies used (wavelengths), type of modulation, purpose, information processing methods, functional features. The issues of noise immunity, optimal reception and recognition of signals against the background of interference are analyzed in detail. Attention is paid to the latest achievements in the field of satellite communications and navigation, trends in the development of RTS. The book covers in detail the role of developers, designers and technologists in the creation and operation of radio systems.