小波特性对间断点检测的影响  

EFFECT OF WAVELET CHARACTERISTIC IN SINGULARITY DETECTION

作　　者：祝强[1] 李言俊[1] 张建华[2] 张铎[1] 

机构地区：[1]西北工业大学航天工程学院,陕西西安710072 [2]西北工业大学机电工程学院,陕西西安710072

出　　处：《陕西科技大学学报（自然科学版）》2007年第4期102-104,114,共4页Journal of Shaanxi University of Science & Technology

基　　金：博士学科点专项科研基金(20020699014)

摘　　要：间断点包含了信号的突变信息,作者从间断点检测的有效性和准确性出发,通过分析具有不同性质的小波对各阶导数间断点的检测过程,论证了在间断点检测中小波必须满足的有效性条件及小波特性对检测准确性的影响,给出了间断点检测中小波的选取取向.Some mutant information is contained in the discontinuous point of signal. The paper discussed the effect of the discontinuous point detection from two aspects, validity and precision. By analyzing different wavelet transformation, the required condition was proposed. In the discontinuous point detection, the vanishing moment of wavelet must higher than the rank of discontinuous point. And the support interval of wavelet can affect the precision of detection. At end, the selection method of wavelet is given in this paper.

关 键 词：小波变换 间断点 消失矩 支撑区间 

分 类 号：TN911.7[电子电信—通信与信息系统]