Synchronization Method in PJM Mode of 13.56 MHz RFID

This paper presents a synchronization method to determine the exact demodulation time using the MFM Flag of the 18000-3 PJM mode, along with the hardware structure to implement the proposed method. The proposed system detects an incipient peak using ITS(Initial Time Selector) and a correlator and achieves the final synchronization via identifying the peak position from the comparison of the outputs of two followed additional correlators. The peak detection algorithm and the choice of the templates of the correlators are described. Simulation results show that the proposed system performs successfully in noisy environment.