Satellite based on-board vehicle navigation system including predictive filtering and map-matching to reduce errors in a vehicular position
US6615135B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | May 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An accurate position of a mobile receiver is determined using a received positional signal having relatively low and high frequency noise components corrupting the positional accuracy of the positional signal. A low frequency error associated with a detected turn of the mobile receiver is derived and applied as a low frequency correction factor to positions of the receiver derived after the turn is detected. Resulting corrected positions are applied along with associated high frequency correction factors representative of the high frequency noise component to a predictive filter to derive predicted positions substantially free of the low and high frequency noise components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.