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Sensors 2018, 18(3), 697; https://doi.org/10.3390/s18030697

Embedding Dimension Selection for Adaptive Singular Spectrum Analysis of EEG Signal

1
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
2
Division of Intelligent and Bio-mimetic Machinery, The State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Received: 12 January 2018 / Revised: 14 February 2018 / Accepted: 22 February 2018 / Published: 26 February 2018
(This article belongs to the Section Physical Sensors)

Abstract

The recorded electroencephalography (EEG) signal is often contaminated with different kinds of artifacts and noise. Singular spectrum analysis (SSA) is a powerful tool for extracting the brain rhythm from a noisy EEG signal. By analyzing the frequency characteristics of the reconstructed component (RC) and the change rate in the trace of the Toeplitz matrix, it is demonstrated that the embedding dimension is related to the frequency bandwidth of each reconstructed component, in consistence with the component mixing in the singular value decomposition step. A method for selecting the embedding dimension is thereby proposed and verified by simulated EEG signal based on the Markov Process Amplitude (MPA) EEG Model. Real EEG signal is also collected from the experimental subjects under both eyes-open and eyes-closed conditions. The experimental results show that based on the embedding dimension selection method, the alpha rhythm can be extracted from the real EEG signal by the adaptive SSA, which can be effectively utilized to distinguish between the eyes-open and eyes-closed states. View Full-Text
Keywords: EEG signal; rhythm extraction; adaptive singular spectrum analysis; embedding dimension selection EEG signal; rhythm extraction; adaptive singular spectrum analysis; embedding dimension selection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Xu, S.; Hu, H.; Ji, L.; Wang, P. Embedding Dimension Selection for Adaptive Singular Spectrum Analysis of EEG Signal. Sensors 2018, 18, 697.

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