Remote terminal location algorithm
US6408246B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The accuracy of location estimates based on time-of-arrival measurements may be improved using a variety of different approaches. In some approaches, accuracy predictions are made before a location estimate is computed, and the location estimate is only computed when a high accuracy is predicted. In other approaches, a plurality of preliminary location estimates are computed, and the accuracy of each preliminary estimate is determined. A final location estimate is then based on the preliminary location estimates with the best determined accuracy. In some approaches, the accuracy predictions and determinations are based on geometric dilution of precision (GDOP) or a known topography of a region. In another approach, a subset of time-of-arrival measurements is fed into a closed-form algorithm to produce a preliminary location estimate. This preliminary location estimate is then used to initialize an open-form location algorithm. Optionally, more than one of these approaches may be combined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.