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.
出处
《电气应用》
北大核心
2006年第11期90-92,共3页
Electrotechnical Application
关键词
小波变换
模极大值
突变点检测
wavelet-transform max-modular inspect discontinuous dot
