Device-free subject localization methods and systems using wireless signals
US11150320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2020 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jul 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Within several applications the ability to localize an individual within an environment is beneficial. However, existing indoor localization approaches depend upon at least one of two assumptions. First, the subject(s) localization is achieved by localizing a wireless device carried by the subject and second, wireless fingerprints are established for the localization via a site survey being performed before a system can actually localize the subject(s). However, in many application scenarios, neither of the above two assumptions are true, namely that the user is not carrying an active wireless device or that the site has been surveyed. Accordingly, embodiments of the invention provide for subject localization by a dynamic calibration of wireless signals between a receiver and a transmitter, where neither the receiver or transmitter are associated with an electronic device carried or worn by the subject.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.