一种基于小波模极大值的信号去噪算法  

De-noising method based on wavelet transform modulus maximum

作　　者：王和平[1] 康景利[1] 

机构地区：[1]北京理工大学机电工程学院,北京100081

出　　处：《系统工程与电子技术》2005年第11期1876-1877,1898,共3页Systems Engineering and Electronics

摘　　要：研究了小波变换中噪声和信号的次要的模量极大值曲线对定位信号特征点造成干扰的问题,提出一种基于小波模阈值和模极大值曲线长度阈值的去噪算法,并把该算法与传统小波阈值去噪算法进行了对比。仿真结果表明,该算法可以明显地去掉噪声和信号中次要的模极大值曲线,保留信号主要的模极大值曲线,在定位信号特征点上优于小波阈值去噪算法。Based on the theory of wavelet transform modulus maximum, the influence made by noise and signal＇s minor modulus maximum is discussed. A de-noising method based on wavelet transform modulus threshold and modulus maximum length threshold is proposed, and its de-noising effect is compared with the traditional wavelet de-noising method. The simulation results indicate that the modulus maximum made by noise are filtered, the primary modulus maximum of signal are kept, and its effect is better than the traditional wavelet threshold de-noising method.

关 键 词：小波变换 模极大值 去噪 

分 类 号：TN911[电子电信—通信与信息系统]