Retrospective interferometry direction finding
US11619700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2021 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Jul 17, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Using captured and stored wideband historical radio frequency data bearing information to the source of a signal of interest achieved using as few as two receivers and a plurality of commutating antennas. Wideband IQ data streams are received at two or more receivers and stored for later analysis. A first receiver is coupled to a reference antenna and a second receiver is commutatively coupled to a plurality of commutating antennas. Later, streams of wideband IQ data are retrieved for a select period of time and synchronized. From these streams a signal of interest identified and synchronously sampled over an acquisition interval by each receiver. Phase differences of the signal at each of the plurality commutating antennas is measured enabling a determination of the bearing to the common signal of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.