Method for rapid location determination using parametric values obtained in a previous location determination
US6757610B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/29
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for providing an initial estimate for an interval of possible values for a parameter used in an acquisition of a signal maintains parameter values obtained from previous signal acquisitions and the times at which the signal acquisitions were made. The maintained values of the parameter are used to derive a candidate value for the parameter to be used in a new signal acquisition. To make the maintained values available even after a brief period during which the GPS receiver is powered down, the maintained values can be stored in a non-volatile memory. The signal acquisitions may correspond to GPS satellite signal acquisitions, and the maintained parameter values can be grouped according to whether a successful receiver location determination was accomplished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.