Monitoring using RF communication technology
US8354925B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2009 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Oct 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/187
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Systems and methods for detecting change in an environment are provided. In one aspect, a system for detecting change in an environment includes an RF noise source configured to transmit an RF noise signal into the environment and to vary a parameter of the RF noise signal, and an interrogator configured to communicate with a plurality of communication devices distributed in the environment over a plurality of communication channels. The system also includes a detection system configured to receive information related to performances of the plurality of communication channels from the interrogator, to generate a fingerprint of the environment for each of the plurality of communication channels based on the performance of the communication channel at different values of the parameter of the RF noise signal, and to detect a change in the environment when one or more of the fingerprints deviates from a respective baseline fingerprint by a certain amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.