基于小波变换模极大值的信号去噪方法研究  

Research on wavelet modulus maxima in the signal de-noising method

作　　者：张玉新[1] 滕桂法[1] 赵洋[1] 李阅历[1] 马建斌[1] 

机构地区：[1]河北农业大学信息科学与技术学院,河北保定071001

出　　处：《河北农业大学学报》2009年第1期114-116,共3页Journal of Hebei Agricultural University

基　　金：河北农业大学非生命学科和新兴学科项目

摘　　要：信号在采集、转换和传输过程中,由于受到设备、环境及人为因素的影响,使信号不可避免地受到噪声干扰。因此,如何去除信号中的噪声,得到感兴趣的信息是信号处理过程中的一项关键技术。对基于小波变换模极大值的信号去噪问题进行了研究,根据信号和噪声的小波变换模极大值在不同尺度上表现出的不同的传播特性,给出了基于小波变换模极大值的去噪算法。数值实验结果表明了该算法的有效性和可行性。In the process of collection, transformation and transmission, signals are often corrupted by noise ineluctably as a result of ineffective equipments, environments and even human errors. Denoising with the purpose of extracting desired information has been a crucial technique in signal processing. This paper discusses the signal de-noising problem based on wavelet transform modulus maxima. According to the different characters of wavelet transform modulus maxima of signal and noise, a de-noising algorithm based on wavelet transform modulus maxima is proposed. The experimental results show that this method is efficient and practical.

关 键 词：小波变换 信号重构 模极大值 阈值 去噪 

分 类 号：TP335[自动化与计算机技术—计算机系统结构]