Method and apparatus providing improved position estimate based on an initial coarse position estimate
US6570530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques for determining the location of a device based on an initial coarse position estimate for the device, which is derived based on initial (less accurate) estimates of the position of a plurality of transmitters. In one method, the coarse position estimate for the device and revised (more accurate) position estimates for the transmitters are received. A revised position estimate for the device is initialized (e.g., to the coarse position estimate). An update vector is next computed based on the initial and revised position estimates for the device and the initial and revised position estimates for the transmitters. The revised position estimate for the device is then updated based on the update vector. The computation for the update vector and the updating of the revised position estimate for the device can be repeated a number of times to achieve a more and more accurate estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.