基于MATLAB的地震动信号小波降噪
摘要
地震动信号在土木工程、地球物理等学科领域有着广泛的应用。而实际记录的地震动信号往往受到脉冲噪声、高斯噪声、椒盐噪声等多种高频噪声的干扰,影响了应用的效果。研究实现了一种新的地震动信号降噪方法,基于小波理论,以实际记录的迁安波为例,利用数学软件MATLAB进行编程,降低地震波高频噪声干扰和简化地震波有效特征向量,并对降噪效果进行了分析。其结果表明,利用小波可以实现对地震动信号的降噪,且信号保持了应有的相似性和光滑性。
引文
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[2]高成.matlab小波分析与应用[M].北京:国防工业出版社,2007.
[3]Mallat S,Hwang W L.Singularity detection and processingwith wavelet IEEE Trans.on Information Theory[J].1992,38(2):617-693.
[4]Iyama J,Kuwamura H.Applicatkm of Wavelets to Analy-sis and simulation of Earthquake Mototus earthquake En-geneng Strucut Dyn.1999,28(3):255-272.
[5]刘爱平.小波理论在土木工程中若干问题的研究[D].兰州交通大学,2008.
[6]Daubechies J.Orthogona bases of commpactly supportedwavelets[J]Gommunieaficct Pure and Application M thati l988,41:909-996.
[7]邓东臬,彭立中.小波分析.数学进展[M].1991:294-307.
[8]Abbate A.Signal detection and noise suppression using awavelet transform signalprocessor[J].IEEE TransUF2FC,1997,44(1):14-25.
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