发明名称 |
FEEDER LINK CONFIGURATIONS TO SUPPORT LAYERED MODULATION FOR DIGITAL SIGNALS |
摘要 |
Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system employs feeder link spot beam to antennas in distinct coverage areas to enable frequency reuse. Another system employs narrow beam width feeder link antenna to illuminate individual satellites also enabling frequency reuse. Yet another system uses layered modulation in the feeder link. Another feeder link system employs a higher order synchronous modulation for the satellite feeder link than is used in the layered modulation downlink signals.
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申请公布号 |
US2009073917(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
US20080190526 |
申请日期 |
2008.08.12 |
申请人 |
THE DIRECTV GROUP, INC. |
发明人 |
ANDERSON PAUL R.;SANTORU JOSEPH;CHEN ERNEST C. |
分类号 |
H04B7/185 |
主分类号 |
H04B7/185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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