小波变换在探地雷达弱信号去噪中的研究

Study of wavelet transform in ground penetration radar weak signal denoising

利用小波系数可以表示小波函数与分析信号的逼近程度这一原理,采用了对不同尺度下小波系数进行叠加的方法,对比9种小波函数,发现应用Mexh小波可以去除探地雷达信号中的高频噪声并放大有效信号,从而为探地雷达信号经传统数据处理方法处理后判定疑似异常位置进一步确定提供依据。

Based on the theory that the wavelet coefficients can signify the wavelet functions and analyze the degree of signal approxima- tion, by superimposing the wavelet coefficients of different scales we compare nine kinds of wavelet functions and find that Mexican hatwavelet can be used to erase high frequency noise in GPR signals and amply effective signals, thereby providing basis for the judgment on suspected abnormal location by adopting the traditional data processing method to process the GPR signals.