Passive geo location of a WLAN device by merging circular error probability ellipses based upon selection of data subsets
US12267807B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2024 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Sep 6, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/006
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of determining a location of a wireless device. The method includes receiving a plurality of beacons, via a measuring station, transmitted from the wireless device. For each beacon, a Times of Arrival (TOA), a Times of Departure (TOD), and a location of the measuring station is identified. A plurality of split time candidates are calculated based on an orbit period of the measuring station and a plurality of cluster modes are calculated for the identified TOAs. A plurality of optimal split times are selected based on the plurality of split time candidates, the plurality of cluster modes, and a beacon drift. A plurality of circular error probability (CEP) ellipses are generated corresponding to the plurality of optimal split times. The plurality of CEP ellipses are merged and a location of the wireless device is determined based, at least in part, on the merged CEP ellipse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.