Abstract：
:The autoregressive (AR) model is widely used in electroencephalogram (EEG) analyses such as waveform fitting, spectrum estimation, and system identification. In real applications, EEGs are inevitably contaminated with unexpected outlier artifacts, and this must be overcome. However, most of the current AR models are based on the L2 norm structure, which exaggerates the outlier effect due to the square property of the L2 norm. In this paper, a novel AR object function is constructed in the Lp (p≤1) norm space with the aim to compress the outlier effects on EEG analysis, and a fast iteration procedure is developed to solve this new AR model. The quantitative evaluation using simulated EEGs with outliers proves that the proposed Lp (p≤1) AR can estimate the AR parameters more robustly than the Yule-Walker, Burg and LS methods, under various simulated outlier conditions. The actual application to the resting EEG recording with ocular artifacts also demonstrates that Lp (p≤1) AR can effectively address the outliers and recover a resting EEG power spectrum that is more consistent with its physiological basis.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Li P,Wang X,Li F,Zhang R,Ma T,Peng Y,Lei X,Tian Y,Guo D,Liu T,Yao D,Xu Pdoi
10.1016/j.jneumeth.2014.11.007subject
Has Abstractpub_date
2015-01-30 00:00:00pages
170-8eissn
0165-0270issn
1872-678Xpii
S0165-0270(14)00399-9journal_volume
240pub_type
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