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Study on adaptive noise cance llation system based on LMS algorithm
Author(s): 
Pages: 100-103
Year: Issue:  3
Journal: Journal of Henan Vocation-Technical Teachers Colle

Keyword:  GetLinkList(KeywordFilter('最小均方误差自适应滤波白噪声MATLAB消噪系统')'kw''CJFQ');
Abstract: 信号重建中,对于统计特性未知或特性随时可能变化的噪声,或是频谱很宽的白噪声,设计传统滤波器比较困难,针对此问题,在介绍LMS算法基本理论的基础上,设计了基于LMS算法的自适应噪声对消系统,并分析了噪声消除原理,最后在MATLAB环境中进行了仿真.实验中应用频谱很宽的白噪声污染有用信号单频余弦波,在时频域,余弦波完全淹没在白噪声中,而后应用所设计的消噪系统进行滤波.仿真结果表明,在时频域白噪声均得到很大抑制,余弦波得到较好恢复,说明基于LMS算法的自适应噪声对消系统非常适用于特性噪声特性未知或复杂的滤波领域.
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