Position and velocity Kalman filter for use with global navigation satelite system receivers
US6664923B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Sep 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS receiver utilizes measurements which span previous and current times, such as delta phase measurements, in a modified Kalman filter. The modified Kalman filter updates position information relating to both the current and the previous times, and s propagates the current position and velocity related information. Using both the current and the previous position related information in the filter in conjunction with delta phase measurements, essentially eliminates the effect of system dynamics from the system model, and a position difference can thus be formed that is directly observable by the phase difference measured between the previous and current time epochs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.