Feeder link configurations to support layered modulation for digital signals
US7423987B2 · kind B2 · utility
6Cited by
193References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2003 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Sep 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18526
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.