Wireless tag ranging
US7405662B2 · kind B2 · utility
40Cited by
14References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2006 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Jan 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are embodiments of methods, systems, and apparatus for ranging or determining a distance between a reader and a wireless tag. In one embodiment, a query signal is transmitted from the reader to the wireless tag. The carrier signal from the reader may then be modulated and the modulated signal transmitted from the reader during at least a portion of a response period for the wireless tag. A modulated backscatter response from the wireless tag is received at the reader and is used to calculate a distance between the reader and the wireless tag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.