Jamming detection in a wireless security system
US5950110A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Aug 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K2203/32
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a wireless security system having a plurality of RF sensor/transmitters and a system controller, jamming signals are detected by comparing a near-term noise value with the expected signal strength of transmissions from the RF sensor/transmitters minus a detection threshold, and with the sum of a long-term noise value and a jamming threshold. In addition, the trend of the long-term noise value is analyzed to determine whether a jamming signal is being intentionally and gradually introduced into the security system environment. The system controller may include a plurality of antennas. Jamming may be detected for each antenna or for all of the antennas, collectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.