Moving transmitter correlation interferometer geolocation
US7268728B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2005 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | May 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4021
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Moving Transmitter Correlation Interferometer Geo-Location (MT-CIGL) system is disclosed that permits locating both moving and stationary transmitters from moving DF equipment. A conjugate gradient based search routine is utilized which solves for the location of moving and stationary transmitters at the start of each measurement sequence and then solves for the velocity and direction of motion of the moving transmitter. This information is used to track the moving transmitter. Received signals are sampled, digitized and stored in covariance matrices. They are then summed and normalized using an equation that has velocity terms that are set to zero to minimize extraneous correlation peaks, and a maximum correlation peak is developed. A conjugate gradient search routine is used to find the correlation peak of the summed data. The value of the peak is then analyzed to see if it is above or below a predetermined value. If the peak value is above the predetermined value the transmitter is stationary and the located correlation peak is the location of the transmitter. If the peak value is below the predetermined value the transmitter is moving and the peak does not indicate the correc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.