System and method for hybrid positioning using Wi-Fi and GNSS blending
US8738035B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2012 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
System and method for hybrid positioning using blended Wi-Fi and GNSS solution is presented, which provides an overall good positioning accuracy as compared to feed forward blending solution. Feeding back Wi-Fi and GNSS blended solutions to replace position states in GNSS enables blended solution to improve using past Wi-Fi information and also enables early correction of GPS drifts in urban canyons. Smart blending prevents early degradation of blended solution due to bad Wi-Fi information. Additionally, it gives good performance in open sky and mild urban canyons where GPS performance is generally quite good. Constrained blending enables good blending even with dependent or clustered Wi-Fi positions. It also keeps feedback loop stable by limiting changes to a blended solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.