摘要
在分析小波包变换具有良好的时频特性基础上,根据信号和噪声具有不同的小波特性,采用浮动阈值去噪的方法,解决了低信噪比情况下弱信号的检测。仿真结果表明,采用小波包去噪可改善系统对信号的检测能力。
By analyzing the good time-frequency properties of wavelet packet transform and according to the different wavelet properties between the signal and noise, the method of using floating threshold to denoise is adopted which realizes the weak signal detection at low signal-to-noise ratio. The simulation result shows that the use of wavelet packet to denoise can increase the signal detection ability for the system.
出处
《煤矿机电》
2007年第5期41-43,共3页
Colliery Mechanical & Electrical Technology
基金
国家自然科学基金资助项目(编号:60474043)
关键词
永磁直线同步电机
小波包变换
MATLAB
浮动阈值
弱信号
检测
permanent magnet linear synchronous motor
wavelet packet transform
MATLAB
floating threshold
Weak signal
Detect
