RFID system and communication method thereof
US8890658B2 · kind B2 · utility
0Cited by
3References
17Claims
0Family size
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Key dates
| Filing date | Aug 14, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jul 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An RFID system using an M pulse amplitude modulation (M-PAM) or M quadrature amplitude modulation (M-QAM) scheme using a plurality of load-modulators, a plurality of antennas, and a communication method thereof are provided. The RFID system includes: an RFID tag; and a reader device communicating with the RFID device, wherein the RFID tag includes: N load-modulators an N antennas communicating with the reader device in any one scheme of M-pulse amplitude modulation (M-PAM) and M-quadrature amplitude modulation (M-QAM) in which modulation of an M level is performed and operated corresponding to the M level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.