个人信息Personal Information
副教授
博士生导师
硕士生导师
性别:女
毕业院校:香港中文大学
学位:博士
所在单位:生物医学工程学院
学科:生物医学工程
办公地点:创新园大厦B1303
联系方式:rliu@dlut.edu.cn
电子邮箱:rliu@dlut.edu.cn
Single-trial evoked potential estimation using an adaptive wavelet method
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论文类型:期刊论文
发表时间:2012-01-01
发表刊物:ICIC Express Letters
收录刊物:EI、Scopus
卷号:6
期号:9
页面范围:2377-2382
ISSN号:1881803X
摘要:To estimate a signal from colored noises is a challenging problem because of the frequency overlap as well as the low signal-to-noise (SNR). In this paper, a novel adaptive wavelet method based on pre-whitening of colored EEG noises for single-trial evoked potential (EP) estimation is proposed. This method does not require prior information about the EPs. In particular, an adaptive weighted thresholding method is formulated using the least-mean-square error (LMSE) scheme to avoid manual selection of wavelet coefficients. For validation purposes, the proposed algorithm is assessed in its ability to extract brain EP corrupted by the colored EEG noises in which SNR values can be as low as -10 dB in real clinical environments. The experimental results show that this algorithm can successfully estimate dynamic changes in EPs, even under poor signal-to-noise ratio (SNR) conditions. ? 2012 ICIC International.