一类样条函数导数型小波

被引:10
作者
陈祥训
机构
[1] 中国电力科学研究院!,北京
关键词
基数B样条; 导数小波; 二进小波; Mallat算法; 小波滤波器设计;
D O I
10.13334/j.0258-8013.pcsee.1999.08.016
中图分类号
TN911.7 [信号处理];
学科分类号
0711 ; 080401 ; 080402 ;
摘要
文章证明,基数B样条的各阶导数是一类二进小波。这类小波具有时域波形变化灵活,滤波特性调节灵活,与被分析信号的匹配方便等特点;在许多方面都优于高斯序列导数小波与Mallat导数小波,可广泛应用于信号分析,模式识别,故障诊断,数据压缩,信噪分离等场合。文章详细研究了这类小波的快速变换算法,滤波参数的计算公式。用这类小波检测信号中几种有代表性的局部变化行为与电力系统极强干扰中的微弱故障信号的仿真结果,证实了这类小波的实用价值。
引用
收藏
页码:76 / 80
页数:5
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