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Satellite communication system, LEO satellite relaying communications between a GEO satellite and terrestrial stations, the uplinks and downlinks using the same frequency band and time-division multiplexing

  • US 9,847,829 B2
  • Filed: 06/01/2012
  • Issued: 12/19/2017
  • Est. Priority Date: 06/16/2011
  • Status: Active Grant
First Claim
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1. A payload for a repeater satellite in a telecommunication system, said repeater satellite being on a traveling orbit above the surface of Earth, and the payload being configured to repeat data received from a stationary satellite above the surface of Earth to terminals that are substantially on the surface of Earth, and to repeat data received from the terminals to the stationary satellite, wherein said payload comprises:

  • a first circuitry configured to use a same frequency band for repeating data to the stationary satellite, referred to as uplink transmissions, and for repeating data to the terminals, referred to as downlink transmissions, said frequency band being any one of the bands VHF, UHF, L, S, C, X, Ka or Q; and

    a second circuitry configured to time multiplex the uplink transmissions and the downlink transmissions, such that said payload does not perform uplink transmissions to the stationary satellite during intervals of time in which said payload performs downlink transmissions to the terminals, and such that said payload does not perform downlink transmissions to the terminals during intervals of time in which said payload performs uplink transmissions to the stationary satellite.

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