基于小波分析的RFID信号调制识别

Modulation Identification of RFID signal Based on Wavelet Transform

小波分析提取数字调制信号的调制特征是一种有效的识别方法。本文讨论了在RFID中常用调制制式(2ASK、2FSK、2PSK)的识别问题,研究了小波变换后信噪比增益与载波频率、抽样速率及小波缩放尺度之间的关系,提出了对抽样速率和小波缩放尺度的优化;对高斯白噪声中的通信信号的识别进行了计算机仿真,实验结果表明,用小波分析方法具有较为理想的识别能力。

The wavelet transform can effectively be used to extract the features of digital modulation communication signals. The identification of modulations （2ASK, 2FSK, 2PSK） in RFID is discussed. Researched the relationships among SNR gain,carrier frequency,sampling rate and wavelet zoom scale after wavelet transform,proposed the optimization of sampling rate and wavelet zoom scale;Then computer simulated the identification of communication signal in Gaussian white noise,the simulations confirm that using wavelet transform method has more ideal identification capability.