发明名称 Satellite communication system
摘要 A communication system has a plurality of ground stations and a plurality of satellites located in a first orbit with respect to the earth. The satellites generate a plurality of beams corresponding to a respective plurality of cell. The plurality of beams has widths that vary relative to position in the orbit to maintain a cell size of the plurality of cells. A plurality of user terminals within the cells receives communication signals from the satellite.
申请公布号 US7480506(B2) 申请公布日期 2009.01.20
申请号 US20070653516 申请日期 2007.01.16
申请人 THE DIRECTV GROUP, INC. 发明人 WANG ARTHUR W.
分类号 H04B7/195 主分类号 H04B7/195
代理机构 代理人
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