Methods and apparatus for self-assisting positioning system
US8510077B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Jul 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method of implementing a positioning system a buffer is configured to store a buffer record for each of a plurality of position fixes determined by the receiver and a database is configured to store a database record for each of the position fixes. Buffer records are accumulated, with each buffer record corresponding to one of the position fixes determined by the receiver. A first threshold position near an area in which a degradation event occurs is identified and recorded in a first database record. A second threshold position near the area is identified in a second database record. The second threshold position is indicated by one of the position fixes outside of the area and is proximate to a position at which the degradation event ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.