Research on RFID Squelch Algorithm Using Wavelet Transform

In this paper, wavelet threshold de-noising method is proposed to improve the signal-to-noise ratio of RFID radio frequency communication signal. Firstly, the performance and characteristics of RFID signals are introduced. Then, several comparable de-noising methods are illustrated. Finally, soft threshold de-noising and hard threshold de-noising methods are utilized to reduce the noise. The simulation results show that these methods effectively eliminate the noise in the RFID signal and the reserved signal has high fidelity.