Active geo-location for orthogonal frequency division multiplex wireless local area network devices using additive correlation in the time domain
US11553453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2021 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Sep 15, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method in a wireless device (WD) is described. The method is performed for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD to the target station and a plurality of response signals received from the target station. The method includes determining expected time domain symbols of an expected response signal, and, for each transmitted signal of the plurality of signals, determining a first time, opening a reception window for receiving a response signal, receiving the response signal within the reception window, frequency shifting the expected time domain symbols, and cross-correlating the time domain symbols with the frequency shifted expected time domain symbols. In addition, the method includes determining a peak correlation value, a second time, and the RTT for each one of the transmitted plurality of signals based at least on the first time and the second time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.