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Mobile Satellite Communications is the first book solely devoted to examining the advanced systems that allow callers to make successful satellite links from moving vehicles on the ground, sea, or in the air. It examines both the history of mobile satellite communications as well as their key technologies. The book offers a complete discussion of mobile satellite orbital dynamics. The authors take an easy-to-understand approach to the satellite position determination principle, and they provide a compact, practical procedure for making orbit calculations. Vehicle antennas, their requirements, gain, beam width, phased arrays, and satellite tracking are also explored. Signal propagation problems and counter methods are discussed in detail in marine, aeronautical and land environments. The book also looks ahead to forthcoming technologies, including satellite phone systems using both geostationary and non-geostationary orbits. Mobile Satellite Communications is an essential resource for antenna and satellite tracking system designers, engineers, and researchers involved in this expansion. It’s also highly appropriate for students at both graduate and undergraduate levels.
1.Introduction: Overview of Mobile Satellite Communications. Classification of Satellite Communications. History of Mobile Satellite Communications. International Coordination. 2. Mobile Satellite Orbits: Circular Orbit. Elliptical Orbit. Geostationary Orbit. Calculating the Range, Azimuth, and Elevation. 3. System Design: System Configuration. Main Parameters in Link Budget. Relation Between Transmitted and Received Power. Signal-to-Noise Ratio in Satellite Communication Links. Key Technologies for Mobile Satellite Communication Systems. Mobile Satellite Transponders. Frequency Intereference. 4. Vehicle Antennas: Requirements for Antennas. Basic Knowledge of Antennas. Basic Antennas. Phased Array Antennas. Satellite Tracking. Sensors. 5. Propagation Problems: Basic Knowledge of Propagation. Propagation in Land Mobile Satellite Communications. Propagation in Maritime Satellite Communications. Propagation in Aeronautical Satellite Communications. 6. Digital Communications Technologies: Modulation and Demodulation. Error-Control Techniques. Coded Modulation. Digital Speech Coding. Multiple Access Techniques. 7. Operational and Forthcoming Systems: Satellite Systems Using Geostationary Orbits – GEOs. Little LEO Satellite Systems. Big LEO Satellite Systems. Broadband Systems. HEO Systems. 8. Mobile Earth Stations: INMARSAT-A. INMARSAT-B. INMARSAT-C. INMARSAT-M. INMARSAT-Aero. Land Mobile Earth Station. Hand-Carried Terminals. 9. Radio Navigation: Range Navigation. Range-Difference Navigation. Doppler Navigation. 10. Mobile Broadcasting: System Requirements for Digital Audio Broadcasting Services. Digital Audio Broadcasting (DAB). 11. Future Systems – Towards Intelligent Satellites: Intelligent Satellites. Examples of Intelligent Satellites.;