Using MIMO training fields for motion detection
US11012122B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2020 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Oct 28, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a general aspect, various fields of a PHY frame are used for motion detection. In some aspects, a first training field and a second, different training field are identified in a PHY frame of each wireless signal transmitted between wireless communication devices in a wireless communication network. A first time-domain channel estimate and a second time-domain channel estimate are generated for each wireless signal. The first time-domain channel estimate is based on a first frequency-domain signal included in the first training field, while the second time-domain channel estimate is based on a second frequency-domain signal included in the second training field. A determination is made whether motion has occurred in a space during the time period based on the first time-domain channel estimates, and a location of the motion within the space is determined based on the second time-domain channel estimates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.