Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-02-27
2007-02-27
Gary, Erika A. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S012100, C455S429000, C455S430000, C455S431000, C342S372000
Reexamination Certificate
active
09536275
ABSTRACT:
A communication system has a plurality of ground stations for communicating communication signal to a plurality of satellites located in an inclined elliptical sub-geosynchronous orbit with respect to the earth. The plurality of satellites operate in a service area in a synchronized manner to provide continuous coverage to the service area. The satellites generate a plurality of beams with variable beamwidths to obtain a substantially uniform cell size covering the service area. A user terminal within the service area receives communication signals from the satellite.
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Gary Erika A.
Grunebach Georgann S.
Nguyen David Q.
The DirecTV Group, Inc.
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