Method, apparatus and system for estimating user position with a satellite positioning system in poor signal conditions
US6473694B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/258
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and corresponding apparatus and system for solving for the position of a satellite positioning system receiver having a receiver clock with a receiver clock offset and responsive to ranging codes from some number of satellites, the ranging code from each satellite including a navigation component conveying information about the satellite and having a time of flight from the satellite, the method of use in signal conditions where the ranging codes can be baseband processed so that at least a repeating part of the pseudorange for each satellite can be determined. The method includes the system time at arrival, i.e. for example the time or arrival according to GPS time, as an independent variable of the pseudorange function for each of the ranging codes, an independent variable in addition to the receiver position, and solves simultaneously for the receiver position and the system time at arrival.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.