System and method for determining speed of a vehicle based on GPS speed
US10338089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2015 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Oct 12, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for determining a speed of a vehicle based on a GPS speed captured from a Global Positioning System (GPS). A capturing module captures GPS speed Vx and a horizontal accuracy value corresponding to a time stamp Tx. A speed modification module modifies the GPS speed Vx corresponding to the time stamp Tx. A speed correcting module corrects the GPS speed Vx corresponding to the time stamp Tx. The GPS speed may be corrected by filtering an error in the GPS speed by using a Slope dependent averaging (SDA) filter in order to obtain a first corrected speed Vx′. Further, the first corrected speed is corrected by selecting one of a center weight (CW) filter and an edge weight (EW) filter, based upon a pre-defined condition, in order to obtain a second corrected speed Vx″ indicating the speed of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.