Titlebook: Satellite Communication Systems; Design Principles M. Richharia Textbook 1999Latest edition M. Richharia 1999 communication.Modulation.sate

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Modulation, was mentioned that the carrier-to-noise ratio is related to the demodulated signal quality by a modulation-dependent factor — without in any way attempting to quantify the factor or explain the modulation process.

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Coding,gnal quality. In many satellite communication applications the desired carrier-to-noise ratio is not achievable. For instance, a VSAT terminal may not have adequate RF sensitivity, or the signal received in a mobile terminal may fluctuate. In such applications a technique known as . is often used. C

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Earth Stations,t information to, the satellite network in the most cost-effective and reliable manner while retaining the desired signal quality. Depending on the application, an earth station may have both transmit and receive capabilities or may only be capable of either transmission or reception. Further catego

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Non-Geostationary Orbit Satellite Systems, complex and, since geostationary satellites met most requirements anyway, not much effort was spent on their development. Molniya orbit was used in the former Soviet Union for providing services to very high-latitude regions where geostationary orbit (GSO) systems were not very reliable. However, s

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Coding, have adequate RF sensitivity, or the signal received in a mobile terminal may fluctuate. In such applications a technique known as . is often used. Coding is the technique of protecting message signals from signal impairments, by adding redundancy to the message signal.

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Future Trends,arth station technology are highlighted next. A section discussing various advanced concepts follows. The chapter concludes by citing examples of programmes which are the forerunners of the next generation of geostationary satellites.