Global positioning system bias detection and reduction
US12270918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2022 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Dec 28, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A global positioning system (GPS)-bias detection and reduction system including a GPS-bias model having GPS statistical data creating a database representing data collected from a vehicle group having thousands or multiple thousands of vehicles saved in a database. At least one newly collected vehicle GPS data point is compared to the GPS statistical data to reduce negative effects of GPS-bias and to update the vehicle GPS-bias correction based on a previous GPS-bias model. A selected road node and a segment of a roadway have a map matching performed using a nearest service from a collection location of the GPS statistical data. A GPS-bias is calculated using a look-up of the database. An estimated horizontal position error (EHPE) defining a quality indicator is applied to distinguish a good quality GPS statistical data from a poor quality GPS statistical data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.