The book in . A. Boilers . Collection of works in five volumes . T. 5, Part 2. Fundamentals of Radio Engineering" is an outstanding publication dedicated to one of the most significant figures in the field of radio engineering and communication. This volume contains the most important works of Vladimir Alexandrovich Kotelnikov, who became the founder of many theories and practices used in the modern world. This work is not just a collection of articles, but a whole encyclopedia of knowledge that will be of interest not only to specialists, but also to everyone who is interested in the development of technologies and their impact on society. The book covers a wide range of topics related to radio engineering, including theoretical foundations, methods of signal transmission and processing, as well as the latest achievements in the field of radio communication. The reader will be able to immerse himself in the world of complex mathematical models and practical applications that formed the basis of modern communication systems. It is important to note that the authors seek to explain even the most complex concepts in accessible language, which makes the book useful both for students of technical universities and for professionals working in the field of radio engineering. This work will be especially interesting for those who are fond of radio engineering, electronics and telecommunications. Students, graduate students and teachers of technical specialties will find in it valuable information that will help to deepen their knowledge and expand their horizons. The book will also be useful to engineers and specialists working in the field of development and implementation of radio systems, as it presents current research and practical recommendations. The topics raised in the book cover both theoretical aspects of radio engineering and practical applications. The reader will be able to learn about the principles of operation of radio systems, methods of modulation and demodulation of signals, as well as about current trends in the field of digital signal processing. Kotelnikov and his colleagues raise important questions regarding the reliability and efficiency of radio systems, which makes their research relevant and in demand. The style of the authors is distinguished by scientific rigor and accuracy, which allows a deeper understanding of complex concepts. Kotelnikov, as one of the leading scientists of his time, always sought to ensure that his work was not only theoretically sound, but also practical. His other well-known works, such as Fundamentals of Information Theory and Methods of Signal Processing, have also become classics in their field and continue to influence the development of radio engineering. The book in . A. Boilers . Collection of works in five volumes . T. 5, Part 2. Basics of Radio Engineering" is not just a textbook, but a real find for anyone who wants to understand how modern communication systems work and what principles are at their heart. It will become an indispensable source of knowledge for those who seek to be at the forefront of technology and want to understand the complex issues of radio engineering. If you are looking for literature on radio engineering, information theory or digital signal processing, this publication should definitely take its rightful place on your shelf. Do not miss the opportunity to touch the heritage of one of the greatest minds of the 20th century and discover the world of radio engineering from a new side!