Method and apparatus for location estimation
US7733836B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2007 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | May 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0258
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one embodiment, a method of estimating location of a mobile beaconing device within a building includes steps: concurrently transmitting from the beaconing device at least first and second signals, which respectively indicates at least first and second transmit power levels thereof; receiving the at least first and second signals by a plurality of anchor devices at different known locations; estimating first distances between the beaconing device and each anchor device as a function of signal power levels of the first signal received by each anchor device, and second distances between the beaconing device and each anchor device as a function of signal power levels of the second signal received by each anchor devices; and calculating an estimated location of the beaconing device as a function of the estimated first distances and second distances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.