Methods and systems for determining vehicle position in an automatic vehicle identification system
US9651659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Jul 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/052
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Methods of estimating vehicle location in a roadway using an automatic vehicle identification system are described. The methods involve receiving a set of response signals from a vehicle-mounted transponder at points in time and determining a range rate of the transponder relative to the antenna at each point in time; identifying a minima in the magnitude of the range rate; estimating a first position of the transponder at a first time corresponding to the occurrence of the minima; estimating a velocity of the vehicle based upon one or more of the determined range rates; and estimating a second position of the transponder based upon the first position and the velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.