Method and apparatus for detection of orthogonal frequency division multiplexing (OFDM) signals by cognitive radios
US8451917B2 · kind B2 · utility
1Cited by
4References
20Claims
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Key dates
| Filing date | Jun 30, 2008 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/0012
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Efficient frequency spectrum sharing between at least one incumbent communication system(s) (102, 104) and at least one cognitive radio (CR) system (106, 108) is provided. The CR unit includes OFDM detection (216) for detecting the presence of OFDM signals which indicate the presence of an incumbent communication system within the shared spectrum. The CR system (106) updates channel occupancy information in response to the detected OFDM signals so as not to interfere with the incumbent communication systems (102, 104).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.