Active geo-location improvements for orthogonal frequency division multiplex wireless local area network devices
US10841140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2019 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Dec 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and wireless device are disclosed that increase the range of active geo-location from the measuring station as compared with known solutions by increasing the effective receive sensitivity of the measuring station by transmitting a predetermined ranging packet and correlating the raw received bit stream of the response packet with one or more predetermined bit streams. In one embodiment, the disclosed method and system may be applied to the reception of IEEE 802.11 orthogonal frequency division multiplexed (OFDM) acknowledgments (ACK) and clear-to-send (CTS) packets in response to OFDM data null and OFDM request-to-send (RTS) packets respectively, in the 2.4 GHz and 5 GHz bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.