Localization using doppler shifts of reflected signals
US11391848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Sep 10, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of Doppler-based localization includes establishing an estimated position for a moving receiver. The method also includes generating a plurality of candidate positions about the estimated position. Each candidate position corresponds to a possible actual location of the moving receiver. For each available satellite, the method includes receiving a measured Doppler effect for a signal from the respective available satellite caused by the moving receiver. For each available satellite, the method also includes, at each candidate position, determining a predicted direction of the signal based on ray-launching the signal to the respective satellite and generating a predicted Doppler effect for the moving receiver. The method further includes identifying a respective candidate position as an actual location for the moving receiver when, at the respective candidate position, the predicted Doppler effect for at least one satellite most closely matches the measured Doppler effect for the at least one satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.