Digital mobile passive leak detection for broadband communication system
US9112762B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Apr 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3818
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Passive detection of a quadrature amplitude modulated (QAM) signal amid noise is achieved by detection of a spectral component of a detected signal that corresponds to a known QAM symbol rate in, for example, a QAM modulated broadband communication system (BCS). Improved authentication can be provided by simultaneously detecting symbol rate components in two or more QAM bands. No modification of a broadband communication system such as by including a marker signal is required and thus there is no requirement for dedication of a portion of the broadband communication system spectrum or problem of marker signal interference with BCS signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.