RFID tag parameter estimation using read difficulty factor
US8988199B1 · kind B1 · utility
11Cited by
2References
17Claims
0Family size
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Key dates
| Filing date | Sep 29, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Jun 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13095
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Radio Frequency Identification (RFID) system uses read difficulty factors (RDFs) to improve tag-parameter estimation. During inventory, a reader can obtain a tag's item identifier (II), determine a read metric such as a received signal strength indicator (RSSI), retrieve an RDF associated with the II, and adjust the RSSI using the RDF to more accurately estimate a tag parameter such as distance from the reader antenna. The system can then use the estimated distance to categorize the tag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.