Positioning system for a motor vehicle having a satellite receiver
US6240368A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a positioning system for a motor vehicle having a satellite receiver, a direction vector subject to error is determined from the received satellite signals. The direction vector subject to error forms an angular range of the direction of travel including a main path and optionally secondary paths of a digitized road map. To determine the actual direction of travel of the motor vehicle, the main path and optionally the secondary paths are pursued, and the path having the best match with the direction vector of the angular range of direction is prioritized. The direction vector is determined from the change in frequency of the received satellite frequencies by the Doppler method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.