Arrangement for, and method of, locating a mobile device in a venue by inferring transit timer values of ranging signals received by the mobile device in a time difference of arrival (TDOA)-based ultrasonic locationing system
US10142798B2 · kind B2 · utility
0Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2016 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Jan 20, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/029
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Ultrasonic transmitters periodically transmit ranging signals at unknown transmit timer values, and an ultrasonic receiver receives the ranging signals at known receive timer values on a mobile device in a venue in which a time difference of arrival (TDOA)-based ultrasonic locationing system is deployed. A controller infers the transmit timer values, and determines a current, real-time position of the mobile device based on flight time differences between the transmit timer values inferred by the controller and the known receive timer values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.