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Title: Comprehensive common spatial patterns with temporal structure information of EEG data : minimizing nontask related EEG component
Authors: Wang, Haixian
Xu, Dong
Keywords: DRNTU::Engineering::Computer science and engineering
Issue Date: 2012
Source: Wang, H., & Xu, D. (2012). Comprehensive common spatial patterns with temporal structure information of EEG data: Minimizing nontask related EEG component. IEEE Transactions on Biomedical Engineering, 59(9), 2496-2505.
Series/Report no.: IEEE transactions on biomedical engineering
Abstract: In the context of electroencephalogram (EEG)-based brain-computer interfaces (BCI), common spatial patterns (CSP) is widely used for spatially filtering multichannel EEG signals. CSP is a supervised learning technique depending on only labeled trials. Its generalization performance deteriorates due to overfitting occurred when the number of training trials is small. On the other hand, a large number of unlabeled trials are relatively easy to obtain. In this paper, we contribute a comprehensive learning scheme of CSP (cCSP) that learns on both labeled and unlabeled trials. cCSP regularizes the objective function of CSP by preserving the temporal relationship among samples of unlabeled trials in terms of linear representation. The intrinsically temporal structure is characterized by an $ell_1$ graph. As a result, the temporal correlation information of unlabeled trials is incorporated into CSP, yielding enhanced generalization capacity. Interestingly, the regularizer of cCSP can be interpreted as minimizing a nontask related EEG component, which helps cCSP alleviate nonstationarities. Experiment results of single-trial EEG classification on publicly available EEG datasets confirm the effectiveness of the proposed method.
DOI: 10.1109/TBME.2012.2205383
Rights: © 2012 IEEE.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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