Determining a passive geolocation of a wireless device by merging circular error probability ellipses
US11627548B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2022 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Sep 1, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/029
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method in a measuring station is described. The method includes determining a plurality of Time of Flights (TOFs) corresponding to plurality of beacons and determining an overall circular error probability ellipse (CEP) based at least in part upon a plurality of times of departure and a corresponding plurality of measuring station positions for each TOF. The method further includes determining at least one individual CEP of a plurality of individual CEPs if at least one of a predetermined time has elapsed and the measuring station has travelled a predetermined distance and determining a merged CEP, where the merged CEP includes the plurality of individual CEPs. Further, the merged CEP is determined to be a better CEP if the merged CEP is more consistent with the plurality of individual CEPs than with the overall CEP. The better CEP is usable to determine a location of a wireless device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.