Downstream broad beam diversity
US7944993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A satellite communication system is provided according to one embodiment of the invention. The satellite communication system includes a plurality of satellites, a gateway and a plurality of subscriber terminals in communication with the gateway through the satellites. The gateway includes a plurality of antennas pointed toward a specific satellite. Each antenna may transmit the same signal to the satellites. The signal may be an OFDM signal. The subscriber terminals may include an antenna pointed toward at least one of the satellites and configured to receive OFDM signals. The OFDM signal time is proportional to the longest transmission time difference of all subscriber terminals within the geographic area serviced by the satellites. The transmission time difference is a measure of the difference between the transmission time of a signal over the longest transmission path and the transmission time of a signal over the shortest transmission path at a subscriber terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.