|
|||||
|
|
| 用小波变换的方法降低机车信号噪声干扰 | |
| 引用本文： | 张建国,赵桔子,张礼勇,王灿利.用小波变换的方法降低机车信号噪声干扰[J].哈尔滨理工大学学报,2006,11(6):114-117. |
| 作者姓名： | 张建国 赵桔子 张礼勇 王灿利 |
| 作者单位： | 1. 哈尔滨理工大学,科学与工程研究院,黑龙江,哈尔滨,150080 2. 哈尔滨理工大学,测控技术与通信工程学院,黑龙江,哈尔滨,150040 3. 哈尔滨理工大学,自动化学院,黑龙江,哈尔滨,150080 |
| 摘 要： | 介绍了一种在铁路机车信号传输过程中,用小波变换的方法降低噪声干扰和提高信号通道信号信噪比的方法,即用小波变换具有低熵性、多分辨率、去相关性和选基灵活性的特点,综合作为特征提取和低通滤波功能的手段,对机车信号和噪声干扰信号同时进行低通滤波和高通滤波,其低频系数主要反映信号信息,高频系数主要反映噪声和信号的细节信息.对非平稳机车含噪信号进行多层小波分析,对每层高频分解系数进行阈值处理后再合成,作为有效达到滤除噪声和保留信号高频信息的手段,对其进行了仿真分析. |
| 关 键 词： | 机车信号 小波分析 信号去噪 小波重构 |
| 文章编号： | 1007-2683(2006)06-0114-04 |
| 修稿时间： | 2006年4月16日 |
On Wavelet Transform for Reducing the Noise Interfere of Engine Signals |
|
| ZHANG Jian-guo,ZHAO Ju-zi,ZHANG Li-yong,WANG Can-li.On Wavelet Transform for Reducing the Noise Interfere of Engine Signals[J].Journal of Harbin University of Science and Technology,2006,11(6):114-117. | |
| Authors: | ZHANG Jian-guo ZHAO Ju-zi ZHANG Li-yong WANG Can-li |
| Abstract: | A kind of method for de-noising and improving signal noise ratio in railway signals transmission by wavelet transform is introduced,viz.,by using the specialties of wavelet transform,low-entropy,multi-resolution and de-correlation,etc,to high pass filter and low pass filter the railway signals and noise signals at the same time.Its high frequency coefficient reflects signal information mostly,and low frequency coefficient reflects noise signals and signal's detail information.This paper also gives multi-level wavelet transform analysis for non-calm railway noisy signals.and threshold processing high frequency decomposition coefficients for each level,then synthesize them,filtered the noises and saved the signal's high frequency information effectively. |
| Keywords: | engine signals wavelet analysis reducing the noise of signals wavelet reconstruction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |