Method and system for distance determination of RF tags
US7511604B2 · kind B2 · utility
59Cited by
18References
124Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2003 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jun 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and system (10) for distance determination of RF tags (4) and its applications based on measuring the round trip delay, avoiding deterministic collisions between a plurality of wide band response signals transmitted by the tags (4) by adding a pseudo-random time delay to the wide band response signal, and iteratively reducing the collision probability between plurality of wide band response signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.