Global Mobile Satellite Systems -

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Résumé :
Global Mobile Satellite Systems - A Systems Overview makes mobile satellite communications understandable for communication engineers, candidates for an engineering degree, technicians, managers, and other decision makers such as financiers and regulators. It provides a systems oriented top-level view of mobile satellite communications. In particular, it focuses on Global Mobile Satellite Systems (GMSS) including active programs such as Globalstar, IRIDIUM, ORBCOMM, ACeS, and Thuraya, or so-called the second generation mobile satellite systems class. The authors start with a brief description of three generations of satellite systems in use or planned in the telecommunications industry. Selected systems architectural trades are identified and explained to illustrate how various GMSS systems are formulated, developed and evaluated. It includes an examination of market demand trends, business trades, regulatory issues as well as technical considerations. Major issues are examined in trade study style to provide easy access to key information. Key systems drivers such as orbit trades between LEO's, MEO's, and GEO's, frequency, protocols, customer bases, and regulatory and engineering issues are included. This book should appeal to individuals interested in the basic elements of Global Mobile Satellite Systems. ...

Sommaire:
1 Introduction to Global Mobile Satellite Systems.- 1.1 Introduction.- 1.2 Generations of GMSS.- 1.3 GMSS Categories.- 1.4 GMSS Infrastructure.- 1.5 Book Organization.- 1.6 The Challenge.- References.- 2 GMSS Architectural Comparisons.- 2.1 Introduction.- 2.2 Architectural Design Process.- 2.3 Gmss Architectural Steps.- 2.4 Summary.- References.- 3 Market Demand Considerations.- 3.1 Introduction.- 3.2 Historical Market Demand for Various Services and Consumer Products.- 3.3 Global Mobile Satellite Systems.- 3.4 Comments.- References.- 4 Regulatory and Spectrum Considerations.- 4.1 Satellite Frequency Allocations.- 4.2 Regulatory Considerations.- 4.3 Mobile Satellite Service Regulation.- 4.4 Summary.- Acknowledgement.- References.- 5 Orbital Trades.- 5.1 Introduction.- 5.2 Arguments For Non-Gso Orbits.- 5.3 Constellation Design.- 5.4 Comparison of Orbits.- 5.5 Trends in Orbits.- References.- 6 Propagation Considerations.- 6.1 Introduction.- 6.2 Satellite Geometry and Received Signal Components.- 6.3 Probability Distributions for Fading Models.- 6.4 Channel Dynamics.- 6.5 The Probability Distribution Based Land Mobile Satellite Channel Model.- 6.6 Summary.- References.- 7 Payload Trades, Antennas and Communications.- 7.1 Introduction.- 7.2 Basic Features of a Payload.- 7.3 Antennas.- 7.4 Link Budgets.- 7.5 Polarization and Frequency Reuse.- 7.6 Access Techniques: FDMA, TDMA, CDMA.- 7.7 Coding: Trading Bandwidth for Power.- 7.8 Space High Power Amplifiers.- 7.9 Transparent vs. Regenerative Payloads.- 7.10 Inter-Satellite Links.- 7.11 The Satellite Bus.- 7.12 Space Segments Technology Trends.- References.- 8 GMSS Summary.- 8.1 Achievements.- 8.2 Architectural Approach.- 8.3 Eventual Success.- 8.4 The Future of GMSS.- 8.5 The Customer.