小波变换在地震信号降噪中的应用
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摘要
为了去除地震信号的噪声,提高其分辨率,本文采用小波分析方法对地震信号进行处理。通过采取合适的小波函数和阈值,对信号进行多尺度分解,取得的降噪效果较为理想。在对地震信号进行降噪的同时,尽可能的还原真实信号,说明小波变化作为一种卓越的数学分析工具,具有较为精确的局部分析能力。
In order to reduce the noise of seismic signal and improve its rosolution,this paper deals with seismic signal adopting waveler analysis method.Adopting appropriate wavelet function and threshold,the seismic signal can be divided into several frequency bands on the multi-scales and the de-noising effect is better.While decreasing noise,the true signal is reverted as much as possible.It demonstrates that as an excellent mathematical analysis tool,wavelet transform has exact local analytical ability.
引文
[1]胡昌华,李国华,刘涛,等.基于MATLAB6.X的系统分析与设计—小波分析[M].西安:西安电子科技大学出版社,2004.
    [2]陆基孟.地震勘探原理[M].东营:石油大学出版社,2001.
    [3]高静怀,王文秉.地震资料处理中小波函数的选取研究[J].地球物理学报,1996,39(3):392.

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