Satellite-based positioning receiver with improved integrity and continuity
US7504996B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jan 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/47
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a receiver of signals of a satellite-based radionavigation system intended to calculate the position of a carrier very precisely. The receiver comprises several digital signal processing channels each associated with a satellite and each providing a first digital datum representing a pseudo-distance between the receiver and the satellite in the form of an instantaneous temporal position of a pseudo-random code and a second digital datum representing this pseudo-distance in the form of an instantaneous phase of the carrier of the signal transmitted by the satellite. According to the invention, the receiver comprises an extended Kalman filter. The Kalman filter for calculates an instantaneous position of the receiver, means for calculates propagation of a state vector, calculates registration of the state vector on the basis of observations relating to each satellite and of a matrix of observations. The Kalman filter calculates observation and calculates an estimated instantaneous pseudo-distance for each satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.