摘要
信号去噪在信息学科领域一直是研究的重点之一。传统的信号去噪方法局限在频域范围内,无法表述信号的时域局部性质。而小波变换是一种信号的时频分析,利用小波方法去噪是小波分析应用于实际工程的一个重要方面。介绍了小波包降噪原理及方法,并通过仿真研究与目前的小波去噪方法进行对比,仿真结果证明了该方法去噪的有效性。
Signal de-noising is always a heat topic in the information discipline domain. The traditional signal de-noising method is work in frequency scope only and can not indicate the trait of signal in time domain. However, the wavelet transform is one kind of signal analysis in time and frequency. Using wavelet de - noising is an important application of wavelet analysis in engineering. The prineiple and method of de - noiseing with wavelet packets are introduced here. This method is proved to be effective by a simulation example and comparision with recent de- noising using wavelet theory.
出处
《现代电子技术》
2007年第19期55-56,共2页
Modern Electronics Technique
关键词
小波包变换
去噪
信号处理
傅里叶变换
wavelet packets transform
de - noising
signal processing
Furior transform
