正交小波变换在LabVIEW中的实现  

Realization of orthogonal wavelet transform in LabVIEW

作　　者：舒强[1] 

机构地区：[1]集美大学理学院,厦门361021

出　　处：《国外电子测量技术》2008年第7期29-31,61,共4页Foreign Electronic Measurement Technology

基　　金：集美大学教改项目资助(JY07146)

摘　　要：LabVIEW是功能强大的虚拟仪器(VI)开发环境,但小波分析功能有所欠缺。本文分析了Mallat正交小波变换算法的原理,介绍了一种利用LabVIEW的数学运算函数实现Mallat算法的方法。设计了小波一维多尺度分解与重构VI,并通过小波阈值降噪的仿真实验对设计进行了验证。通过对滤波器参数进行设置,本文的设计可适用于多种小波函数。小波变换的引入,扩展了LabVIEW的时频分析功能。LabVIEW is a developing environment of virtual instrument with powerful functions, but its wavelet analysis functions are poor. The principle of Mallat algorithm in orthogonal wavelet transform is presented in this paper, and a kind of realization method of Mallat algorithm using mathematics functions in LabVIEW is introduced. The VIs of Multilevel 1-D wavelet decomposition and reconstruction are designed, and are proved by simulate experiment of de-noising via wavelet threshold. This design is applicable to many kinds of wavelet functions by setting Wavelet filters. With the realization of wavelet transform, the time-frequency analysis functions of LabVIEW are expended.

关 键 词：LABVIEW 正交小波变换 MALLAT算法 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]