Titlebook: Satellite Systems for Personal and Broadband Communications; Erich Lutz,Markus Werner,Axel Jahn Book 2000 Springer-Verlag Berlin Heidelber

非实体

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任意

过份好问

CLOWN

https://doi.org/10.1007/978-3-642-59727-5Routing; bridge; broadband communications; communication; satellite; signal transmission; telecommunicatio

AGONY

Satellite Orbits, Constellations, and System ConceptsAt this point of the book we present the subject of satellite orbit mechanics to discuss some geometric relations between satellites and ground terminals. We also introduce different satellite constellations which can be used to build up regional or global satellite systems.

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Signal TransmissionThis chapter is not intended to provide a thorough treatment of signal transmission techniques, rather we review the basic concepts of speech coding, modulation, channel coding, and packet transmission schemes as far as they are relevant for the following chapters. For more detailed information thereader is referred to the cited literature.

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Multiple AccessA radio communication terminal, satellite, or ground station cannot simultaneously receive and transmit at the same frequency; the transmit signal would heavily jam the receive signal. Therefore, some scheme for separating the forward and return link transmission must be applied.

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