Active virtual fence using mesh networked RF tags
US8890677B2 · kind B2 · utility
10Cited by
12References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2008 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system capable of monitoring an area and detecting a disturbance with the area. The system has a plurality of ultra-wide band radio frequency tags, each of the tags including a digital signal processing module configured to monitor changes in radio frequency multipath properties of received packets transmitted by at least one other of the tags. Changes in the radio frequency multipath properties may be caused by a disturbance indicative of an object in the vicinity of the tags. A corresponding method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.