Method for improving direction finding and geolocation error estimation in a direction finding system
US10274579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2017 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Sep 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/02695
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for improving direction finding and geolocation error estimation in direction finding and geolocation systems is disclosed. The corresponding phases of the received signals are determined. After an initial target estimation point of the received signals has been identified, the initial target estimation point is projected onto the earth's surface. A search grid having multiple grid points is then overlaid on the projected initial target estimation point, surrounding the projected initial target estimation point. The phase of signals emitting from a theoretical emitter located at each of the grid points of the search grid is estimated. Correlation coefficients between the estimated phases of the emitting signals and the determined phases of the received signals are determined. An error ellipse can be generated around one of the grid points having the highest correlation coefficient, and a source emitter is likely to be located within the error ellipse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.