Training Manual . Moscow, Eco-trends, 2005, 392s. The theoretical bases of construction of digital radio communication systems, including the theory of information, the theory of potential immunity and the foundations of noise-resistant coding. Quantitative indicators of energy and band efficiency of communication systems have been introduced and analyzed, and ways to improve signals for these indicators have been described. The issues of construction and use of band-efficient and broadband signals, ways and methods of multi-channel message transmission during temporary sealing . are considered. Separate sections are devoted to the problems of operation of digital radio communication systems over multi-beam channels and the construction of synchronization devices for these systems. The final chapter, as an illustration of the use of the above methods, provides a brief overview of the issues of building modern promising ground and satellite communication systems, primarily cellular . For university students studying in the areas of 6504 "Telecommunications" and 6542 "Radio engineering" Can be useful to engineers involved in the development and operation of modern digital communication systems.