Signal detection in cognitive radio systems
US8140017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jan 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/318
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cognitive radio wireless device (114) dynamically manages signal detection in a cognitive radio system (100). Spectrum sensing is performed for a first sensing frame on at least one communication channel. At least one observed signal is received (204) on the at least one communication channel. A detection decision (210) is performed to determine if the observed signal is noise or an active signal associated with an active user. The detection decision (210) is performed by comparing observed signal energy estimation with a current detection threshold. The current detection threshold can be an arbitrarily defined threshold or a detection threshold based on a previous detection decision for a sensing frame immediately prior to the first sensing frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.