Power control in cognitive radio systems based on spectrum sensing side information
US8041380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
For cognitive radio systems, the transmit power of a cognitive radio device is controlled so that the cognitive, unlicensed radio device does not interfere with the use of a shared spectrum by a primary, licensed device. Controlling the transmit power includes determining a distance, or a function of the distance, between a primary transmitter of the primary device and the cognitive radio device based on sensing information from a spectrum sensing process. The maximum transmit power of the cognitive radio device is then dynamically controlled based on the distance, or the function of the distance, while considering a worst case scenario of an underlying cognitive radio model, to guarantee a quality of service requirement of the primary device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.