Active geo-location for orthogonal frequency division multiplex wireless local area network devices using additive correlation
US11683778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2021 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Nov 9, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/0864
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method in a wireless device (WD) is described. The method is at least for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD and a plurality of response signals received from the target station corresponding to the plurality of signals transmitted by the WD. The method includes determining an expected response signal, and, for each transmitted signal of the plurality of signals, determining that a response signal type matches an expected response signal type, cross-correlating a set of samples of the response signal, searching for a predetermined characteristic of the expected response signal, and correlating at least a subset of bits of the set of bits of the received response signal with the set of expected bits of the expected response signal. Further, a peak rolling sum correlation and the RTTs are determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.