RFID system and communication method thereof

摘要

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.

主权项

1. An RFID system comprising:
an RFID tag; and a reader device communicating with the RFID tag, wherein the RFID tag includes:
N load-modulators and 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;a code generating unit adding a parity to data stored in the RFID tag to generate an error correcting code; anda preamble signal generating unit generating a preamble code having auto-correlation characteristics of a delta function,wherein N load-modulators and N antennas transmit the error correcting code and the preamble code to the reader device in any on scheme of M-pulse amplitude modulation (M-PAM) and M-quadrature amplitude modulation (M-QAM) in which modulation of the M level is performed and operated corresponding to the M level.