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非高斯噪声背景下的诱发电位信号去噪方法
引用本文:林政剑,熊美英,查代奉.非高斯噪声背景下的诱发电位信号去噪方法[J].计算机工程与应用,2014(9):186-188.
作者姓名:林政剑  熊美英  查代奉
作者单位:九江学院电子工程学院,江西九江332005
基金项目:国家自然科学基金(No.61261046);江西省教育厅科技项目(No.GJJ11621)。
摘    要:在一些特殊实验条件下EP信号的背景EEG噪声具有显著脉冲特性。基于传统的小波去噪方法不能有效地去除EP信号中具有尖峰脉冲特性的背景噪声。提出中值滤波-小波阈值去噪算法,进行中值滤波抑制信号中的尖峰脉冲,利用小波阈值消噪去除剩余噪声。仿真结果表明经过中值滤波预处理后的小波去噪方法比传统的小波去噪方法在信噪比较低时更具有良好的消噪性能。

关 键 词:诱发电位  脉冲噪声  α稳定分布  中值滤波  小波去噪

Evoked potentials denoising method in non-Gaussian noise
LIN Zhengjian,XIONG Meiying,ZHA Daifeng.Evoked potentials denoising method in non-Gaussian noise[J].Computer Engineering and Applications,2014(9):186-188.
Authors:LIN Zhengjian  XIONG Meiying  ZHA Daifeng
Affiliation:(College of Electronic Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China)
Abstract:The electroencephalogram(EEG)noises possess remarkable outlier in Evoked Potentials(EPS)in some especial experimentation. The outlier can not be eliminated effectively based on traditional wavelet denoising method. A new method combining median filter and wavelet threshold is proposed. After suppressing the outliers in EPS through median filter, wavelet threshold is used and remained noise is eliminated. The simulation experimental results show that the new method can suppress the outliers in EPs effectively, and it is more robust than traditional wavelet threshold in lower Signal-Noise Ratio(SNR).
Keywords:Evoked Potentials(EPs)  impulsive noise  α-stable distribution  median filter  wavelet denoising
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