Slabé signály – Kasal Miroslav (2023)

The book deals with the highly relevant and dynamically evolving issue of long-distance radio communication, particularly in outer space. The term 'weak signals' refers to radio signals whose level is comparable to the level of natural background noise at a given bandwidth, especially in environments characterized by low thermal noise levels. This exceptionally complex issue ranges from general physical principles to highly specialized questions regarding the design and optimization of microwave antennas, low-noise amplifiers, receivers, transmitters, and frequency synthesizers with very specific properties. The book pays great attention to advanced radio communication techniques using signals reflected from the lunar surface (EME), where, with the use of modern and continually improving software for digital communication, connections are successfully established with signals that are 10 or more decibels weaker compared to analog modes. Individual thematic chapters of the book briefly summarize the theory and practically applicable relationships, complemented by descriptions of specific solutions for various parts of the communication system. Detailed commented examples of calculations and implementations are interesting and for...