Method of measuring a distance between two radio-communication devices and device adapted to implement one such method
US8521091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2005 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Jun 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method of measuring a distance between two radio-communication devices (1, 2), consisting in measuring a radio signal exchange delay. According to the invention, the time-of-flight of the signals is calculated from the exchange delay and subsequently corrected using an analysis of a single channel measuring frame that is transmitted between the two devices. The corrected time-of-flight corresponds to the shortest propagation path followed by the radio signals. In the majority of radio transmission medium configurations, the corrected time-of-flight is a straight line measurement of the distance separating the two devices (1, 2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.