Weak RFID tag signal recovery from collisions
US10037444B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2018 |
| Grant date | Jul 31, 2018 |
| Priority date | — |
| Expiry date | Jan 22, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10019
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
RFID readers may be configured to recover multiple, collided RFID tag signals. An RFID reader may receive a collided reply waveform including at least first and second tag responses. The reader may determine that the collided reply waveform contains multiple tag responses and recover the first and second tag responses from the collided reply waveform. The reader may first recover the first tag response, reconstruct the first tag response, and subtract the reconstructed first tag response from the collided reply waveform to form a modified tag response. The reader may then recover the second tag response from the modified tag response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.