Access control system and method for operating an access control system
US11610446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2019 |
| Grant date | Mar 21, 2023 |
| Priority date | — |
| Expiry date | Mar 22, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/64
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for controlling access to an access-restricted zone in a building includes a transmitting device transmitting a first radio signal, a receiving device for radio signals, a control device and a signal processing device communicatively connected to the receiving and control devices. The signal processing device determines a first channel impulse response based on the first radio signal received by the receiving device and a second channel impulse response based on a second radio signal received by the receiving device. The second radio signal is transmitted from a first mobile electronic device of a first user. The signal processing device determines a degree of similarity by evaluating the first and second channel impulse responses. The degree of similarity indicates how similar the first and second channel impulse responses are to one another. The control device initiates a building action if the degree of similarity meets a specified rule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.