《计算机应用研究》|Application Research of Computers

基于谱插值与经验模态分解的表面肌电信号降噪处理

Noise reduction of surface electromyography signal using spectrum interpolation and empirical mode decomposition

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作者 李强,李博,杨基海
机构 1.西南科技大学 信息工程学院,四川 绵阳 621010;2.中国科学技术大学 电子科学与技术系,合肥 230027
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文章编号 1001-3695(2010)09-3326-03
DOI 10.3969/j.issn.1001-3695.2010.09.033
摘要 根据表面肌电(surface electromyography, sEMG)信号的噪声特性来探讨其降噪方法的应用问题。采用谱插值法来削弱工频干扰以避免工频处的肌电信息成分丢失,再选取通过经验模态分解(empirical mode decomposition, EMD)方法获得的内在模态函数(intrinsic mode function, IMF)分量作小波软阈值分析,并将部分明显的低频IMF干扰分量及冗余分量去除,然后对相应IMF分量进行重构便可得到降噪处理后的sEMG信号。仿真和真实信号的降噪实验结果
关键词 表面肌电信号;降噪;谱插值;经验模态分解
基金项目 国家自然科学基金资助项目(30870656);西南科技大学博士研究基金资助项目(08zx0110)
本文URL http://www.arocmag.com/article/1001-3695(2010)09-3326-03.html
英文标题 Noise reduction of surface electromyography signal using spectrum interpolation and empirical mode decomposition
作者英文名 LI Qiang, LI Bo, YANG Ji-hai
机构英文名 1. School of Information Engineering, Southwest University of Science & Technology, Mianyang Sichuan 621010, China; 2. Dept. of Electronic Science & Technology, University of Science & Technology of China, Hefei 230027, China
英文摘要 This paper introduced a combined method of spectrum interpolation and empirical mode decomposition (EMD) to explore the noise reduction of surface electromyography (sEMG) signal. According to the spectrum interpolation, subtracted the power line interference and could hold the useful information of sEMG signal at the power line frequency. Based on the EMD algorithm, selected some proper intrinsic mode functions (IMFs) to be analyzed by the wavelet soft threshold, removed the residual component and several noised IMFs dominated by low frequency, then, reconstructed the denoised sEMG signal by the processed IMFs. Using the simulated and real sEMG signals, the experimental results show that the signal quality is improved. And the noise in the sEMG signal can be suppressed by the proposed method.
英文关键词 surface electromyography signal; noise reduction; spectrum interpolation; empirical mode decomposition
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页码 3326-3328
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文献标志码 A