小波变换模极大值法检测信号突变点  

Applying Wavelet-Transform to Inspect the Discontinuous Dot of Signal

作　　者：郭先定[1] 李敏[2] 何光普[2] 

机构地区：[1]乐山师范学院数学系,614000 [2]乐山师范学院物电系,614000

出　　处：《电气应用》2006年第11期90-92,共3页Electrotechnical Application

摘　　要：传统的傅里叶分析由于在时域不能局部化,难以精确检测到信号发生突变的时间。小波变换由于具有良好的时频局部化特性,故能精确检测到信号发生突变的时间。介绍应用小波变换模极大值法检测信号突变点的方法,仿真结果证明该方法的有效性。Conventional Fourier transform can＇t localize in time field, so it can＇ t inspect signal＇ s break time accurately. While wavelet transform can localize in both time and frequency field, it can inspect signal＇s break time accurately. How to apply wavelet transform max - modular to detect signal＇ s discontinuous time is introduced . Simulation result testifies it＇ s validity.

关 键 词：小波变换 模极大值 突变点检测 

分 类 号：TM930[电气工程—电力电子与电力传动]