Fundamentals of building infocommunication networks and systems

The basic principles of constructing telecommunication systems are set out, their classification is given, the idea of ​​the model of interaction of open systems. Information is given by signals and electrical channels. Analog systems and digital transmission systems (plyziochron and synchronous digital hierarchy) are considered. The main methods of separating communication networks are described. The main characteristics and description of communication lines on a symmetrical cable and fiber -optical communication lines are given. The information distribution systems with spatial and temporary switching, cellular systems, including the LTE and 5G network, are described. The book is intended for bachelors, undergraduates and graduate students studying in areas of radio engineering and communication systems. It can be used by specialized engineers and scientists.
2nd edition, processed and supplemented