System for spectrum sensing of multi-carrier signals with equidistant sub-carriers
US8982971B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Mar 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-carrier signal is typically comprised of many equidistant sub-carriers. This results in periodicity of spectrum within the bandwidth of such a multi-carrier signal. An unknown multi-carrier signal with equidistant sub-carriers can thus be sensed together with its sub-carrier spacing by finding a discernable local maximum in the cepstrum (Fourier transform of the log spectrum) of the multi-carrier signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.