Weak RFID tag signal recovery from collisions
US9881186B1 · kind B1 · utility
7Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Jun 20, 2017 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Jun 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10019
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
RFID readers may be configured to recover weak RFID tag signals from collisions with stronger RFID tag signals. An RFID reader may receive a combined tag response including a strong tag response and a weak tag response. The reader recovers the strong and weak tag responses using source separation. In one example, the reader may recover the strong tag response from the combined tag response and remove the recovered tag response from the combined tag response to form a modified tag response. The reader may then recover the weak tag response from the modified tag response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.