| 基于多尺度分析的数字通信系统消噪 |
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| 引用本文： | 夏平,覃琴.基于多尺度分析的数字通信系统消噪[J].广西师范大学学报(自然科学版),2005,23(1):13-16. |
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| 作者姓名： | 夏平 覃琴 |
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| 作者单位： | 三峡大学,电气信息学院,湖北,宜昌,443002;三峡大学,电气信息学院,湖北,宜昌,443002 |
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| 基金项目： | 三峡大学青年科研基金资助项目 |
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| 摘 要： | 根据数字通信系统中加性高斯白噪声的特点，分析了去噪阈值的选取，详细地讨论了小波的多尺度浮动阈值方法，它能较好地满足在小信噪比下识别微弱信号的要求，并将这种方法应用于通信系统去噪，做到滤去噪声的同时又有效地保留信号的高频成分．
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| 关 键 词： | 数字通信系统 小波多尺度分析 噪声 阈值 |
| 文章编号： | 1001-6600(2005)01-0013-04 |
NOISE-FILTERING OF DIGITAL COMMUNICATIONS SYSTEMS BASED ON WAVELET MULTIRESOLUTION ANALYSIS |
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| XIA Ping,QIN Qin.NOISE-FILTERING OF DIGITAL COMMUNICATIONS SYSTEMS BASED ON WAVELET MULTIRESOLUTION ANALYSIS[J].Journal of Guangxi Normal University(Natural Science Edition),2005,23(1):13-16. |
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| Authors: | XIA Ping QIN Qin |
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| Abstract: | According to the characteristics of signal to noise ratio,in digital communications systems,traditional method wipes out white noise while receiving the signals with the help of the threshold circuits.However,this method easily loses useful information,and does not meet the requirement of detecting feeble signals in high noise.This paper analyzes the way to get the threshold of noise-filtering according to the noise features in digital communications systems.Alterable MRA threshold method that meets the requirement of detecting feeble signal in high noise is analyzed in detail.This paper also analyzes the way to filter out noise in the digital communications systems with the method of alterable MRA threshold that could effectually reserve signals while filtering out noise. |
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| Keywords: | digital communication multiresolution analysis (MRA) noise threshold |
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