Satellite communications system with frequency channelized beams
US4425639A · kind A · utility
102Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1981 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Jan 12, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/2045
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital communications satellite (12,44) receives signals from a plurality of narrow input spot-beams (14) of an uplink. It regenerates, multiplexes and routes the signals for transmission in a plurality of narrow output spot-beams (42) of a downlink. The uplink beams (14) each include a plurality of frequency re-use channels (18), while the downlink beams (42) each have only a single wide-band channel. The satellite (12,44) may multiplex the signals either before or after routing them. The spot-beams (14,42) may be fixed or scanning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.