Spectrum sharing between an aircraft-based air-to-ground communication system and existing geostationary satellite services
US8442519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2011 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Aug 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present Spectrum Sharing System implements spectrum reuse between aircraft-based Air-To-Ground (ATG) communication systems and Geostationary Satellite Service systems. This is accomplished by managing the radio frequency transmissions in the volume of space in which the aircraft operates, with interference between the Spectrum Sharing System and the Geostationary Satellite Service system being reduced by implementing reversed uplink and downlink radio frequency paths in the common spectrum. The Spectrum Sharing System also avoids interfering with Geostationary Satellite Services' earth stations which are pointed towards the satellites' orbital arc by relying upon a combination of the earth stations' highly directive antenna patterns and the Spectrum Sharing System ground station antenna pattern, and to avoid interfering with satellites in their orbital arc by assuring that power levels radiated in that direction by the Spectrum Sharing System ground stations are below the level that would create interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.