System and method for sensitivity optimization of RF receiver using adaptive nulling
US7369811B2 · kind B2 · utility
26Cited by
13References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Apr 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides sensitivity enhancement for a single antenna RFID interrogating device by separately coupling a nulling signal formed using a portion of a transmit signal into a receiver. The phase and amplitude of nulling signal can be adjusted so that the nulling signal cancels that a reflected transmit signal from the antenna, resulting in the small backscattered signal from the distant RFID tag to be more easily detected, and improving the sensitivity of the RFID receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.