Communication system employing spectrum reuse on a spherical...

Details Communication system employing spectrum reuse on a spherical... Communication system employing spectrum reuse on a spherical...

H - Electricity

04

B

H04B 7/185 (2006.01) H04B 7/12 (2006.01) H04B 7/204 (2006.01) H04B 7/26 (2006.01)

Patent

CA 2098259

COMMUNICATION SYSTEM EMPLOYING SPECTRUM REUSE ON A SPHERICAL SURFACE ABSTRACT Orbiting satellites project footprints on the earth. Each footprint is divided into cells. Footprints of nearby satellites overlap one another, and the overlap increases as satellites approach a pole from the equator. The positions of all cells generated by all satellites are simulated at numerous points throughout an orbit. Cells are marked as being active or inactive to compensate for the overlap at each simulated point. Channel sets are assigned to cells within a reference footprint, and this assignment is propagated throughout all footprints in the referenced footprint's orbit. The channel set sequences are propagated to other orbits after taking into account inactive cells located near boundaries between the orbits. Each satellite stores channel set assignments for its cells at the various points throughout its orbit. All satellites switch their communication parameters at the same instant in response to the channel set assignments.

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