Globally-convergent geo-location algorithm
US8188919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2009 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Jun 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for estimating a geolocation of a non-cooperative target using any reasonable target location estimate. Collectors may acquire actual signal measurements including a direction of arrival (DOA), a target range, a time difference of arrival (TDOA), a range rate, a range sum, and/or a frequency difference of arrival (FDOA). A processing device may receive the actual signal measurements and navigational data regarding the collectors. Then, the processing device may calculate an estimated target location as a solution to a nonlinear optimization problem where an objective function to be minimized is a weighted sum-of-squares of differences between the actual signal measurements and calculated values corresponding to signal measurements that theoretically should be produced for a particular target location. The algorithm used to solve this problem may be a globally convergent algorithm, such as a Levenberg-Marquardt algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.