Localization using virtual antenna arrays in modulated backscatter RFID systems
US8446253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Feb 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/756
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A localization method for use in a tag communication system includes associating a supertag having a plurality of tags with an item, reading backscatter signals from the tags of the plurality of tags to provide a plurality of backscatter signals, estimating a signal parameter of the backscatter signals of the plurality of backscatter signals to provide a plurality of derived signal parameters, and localizing the item in accordance with the plurality of derived signal parameters. The backscatter signals are read by a tag reader having a single antenna and the item is localized in accordance with an antenna array technique performed upon the plurality of derived signal parameters. The backscatter signals are read with an antenna array to provide a further plurality of derived signal parameters for each tag of the plurality of tags, and the item is localized in accordance with the further pluralities of derived signal parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.