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Systems and methods for inter-system sharing of satellite communications frequencies within a common footprint

  • US 7,113,743 B2
  • Filed: 09/02/2004
  • Issued: 09/26/2006
  • Est. Priority Date: 09/11/2003
  • Status: Active Grant
First Claim
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1. A satellite communications frequency sharing system comprising:

  • a first satellite communications system that provides satellite communications over a first satellite frequency band in a first footprint via a first satellite; and

    a second satellite communications system that provides satellite communications with radioterminals over the first satellite frequency band in a second footprint that is a sub-area of the first footprint, via a second satellite, wherein a receive antenna gain of the second satellite is higher than a receive antenna gain of the first satellite;

    wherein an aggregate effective isotropic radiated power of the radioterminals and a receive antenna gain of the first satellite are sufficiently low so as to increase an aggregate noise that is seen by the first satellite communications system by less than about 3.5%.

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