Location obtained by combining last known reliable position with position changes
US8643544B2 · kind B2 · utility
8Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Location of a wireless communication device is determined by a combination of geolocation and a detection of augmenting data such as acceleration and/or speed over time measurements. A last known terrestrial navigation fix is established based on reliable terrestrial navigation or GPS data. A zone of valid location fixes based on the last known terrestrial navigation fix and an output of a rate detection circuit can be established. A weighted average is taken of using independent location measurement and detected location using last known reliable position plus change in position by integrating position changes over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.