Position determination based on phase difference
US7045996B2 · kind B2 · utility
46Cited by
9References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Oct 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/263
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for determining position of a device includes generating at least two, time-varying, magnetic fields using inductive elements, wherein the fields have differing phases. The method further includes detecting a signal modulated on top of the fields, wherein the signal is generated from the device, and determining a position of the device based on a phase difference of the signal from the device and a reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.