Communications Satellites —— The Technology of Space Communications

----- 通信卫星空间通信技术

ISBN: 9780434901531 出版年：2017 页码：177 Blonstein, Larry Butterworth-Heinemann_RM

Communications Satellites: The Technology of Space Communications focuses on the technologies and approaches employed in communications satellites. The book first tackles geosynchronous orbit, low orbit to geosynchronous altitude, disturbances in orbit, and turning a crate into a satellite. Topics include thermal and electrical power, station-keeping, and 'pointing'. The publication then ponders on on-board communications equipment, logarithms and decibels, and radio frequencies and wavelengths and their allocations. Discussions focus on fixed, broadcast, and mobile services, complete satellite, transponders, and antennas. The manuscript examines earth stations, traffic capacity and quality, selecting a satellite, and economic system optimization. Compression and modulation techniques, echo and delay, encryption, space loss, estimation of traffic capacity and quality, and up-link transmission are discussed. The text then elaborates on the economics of satellite communications and operational systems. The publication is valuable reference for readers interested in the technologies and approaches involved in communications satellites.