摘要
针对信号检测中经常存在的噪声污染问题,介绍了小波变换的一般理论以及在信号降噪中的应用,分析了被噪声污染后的信号的特性;利用MATLAB软件进行了信号降噪的模拟仿真实验;分别使用了不同类型的小波和相同类型小波下不同阈值对信号进行了降噪.仿真结果表明小波变换具有良好降噪的效果.
In view of the noise pollution in signal detection, this paper deals with the general theory of wavelet transform, the application of wavelet transform in signal De-noisinng as well as the analysis of the characteristics of noise-polluted signal. At last, the Matlab is used to be carried out the simulation where the different wavelet and different threshold of the same wavelet for signal De-noising are applied, simulation shows that the wavelet transform can achieve excellent results in signal De-noising.
出处
《北京工商大学学报（自然科学版）》
CAS
2009年第2期46-49,共4页
Journal of Beijing Technology and Business University:Natural Science Edition
基金
北京市属市管高校人才强教计划项目(19004811009)
关键词
小波变换
信号检测
降噪
阈值
MATLAB仿真
wavelet transform
signal detection
de-noising
threshold
MATLAB simulation
