地震波信号降噪技术

Application of Wavelet Transform to Seismic Exploration

针对地震波信号本身的复杂性,在接收和处理地震波信号的各个阶段都可能引入噪声的问题,提出了采用小波变换对地震波信号进行降噪的方法,小波变换降噪方法在去除掉高频噪声的同时保留了信号的高频成分,是一种比傅立叶变换更有效的降噪方法。对比了几种小波去噪的方法,从不同的性能指标中优化出针对地震波信号的环境特点最为有效的降噪方法,从而达到有效提取有用信号的目的。

In order to solve the problem of the complexity of seismic wave signal and noise probably introduced in the whole course of accepting and disposing seismic wave signal, a de-noising approach using wavelet transform is proposed. Wavelet Transform is adapted to reach the purpose of reducing the noise in the seismic wave signal and meanwhile retain signal＇s high frequency. By comparing different de-noising methods, the most efficient method would be adopted to distill the useful signal.