System and method for position determination in a building
US11846716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2019 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Sep 4, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/02528
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for determining a position of a user in a building includes a control device, a plurality of stationary radio signal transmission devices, a radio signal receiving device, and a signal processing device. The signal processing device determines primary channel impulse responses based on the radio signals received by the receiving device. The signal processing device also determines a secondary channel impulse response based on a secondary radio signal received by the receiving device from a mobile device of a user. The channel impulse responses are evaluated to determine degrees of similarity that indicate how similar a first primary channel impulse response and the secondary channel impulse response are to one another. For each degree of similarity, a distance of the mobile device from the transmission device corresponding to the degree of similarity is determined. A position of the mobile device is determined based on the distances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.