High frequency geo-location methods and systems
US11092665B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2019 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Dec 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The described disclosure presents embodiments of an efficient shortwave radio technique using a network of multiple sites located in and around an operating region (e.g., continental USA), calibrated distributed beacons, a detailed knowledge of ionospheric behavior, and sophisticated operational tools and software, that geo-locates targets without depending on satellites. The embodiments of the technique described herein, for example, accurately may locate a target by utilizing remote field units, a network of radio receive sites, receivers that accept and time stamp pertinent signals, demodulators that recognize and extract meaningful data from received signals, communications from all receive sites to a Network Operations Center (NOC), communications from NOC to field units to keep shortwave channel choices relevant and effective, and a processor within the NOC that analyzes and evaluates data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.