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Ensemble SVM Method for Automatic Sleep Stage Classification
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
Effat Univ, Saudi Arabia.
2018 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 67, no 6, p. 1258-1265Article in journal (Refereed) Published
Abstract [en]

Sleep scoring is used as a diagnostic technique in the diagnosis and treatment of sleep disorders. Automated sleep scoring is crucial, since the large volume of data should be analyzed visually by the sleep specialists which is burdensome, time-consuming tedious, subjective, and error prone. Therefore, automated sleep stage classification is a crucial step in sleep research and sleep disorder diagnosis. In this paper, a robust system, consisting of three modules, is proposed for automated classification of sleep stages from the single-channel electroencephalogram (EEG). In the first module, signals taken from Pz-Oz electrode were denoised using multiscale principal component analysis. In the second module, the most informative features are extracted using discrete wavelet transform (DWT), and then, statistical values of DWT subbands are calculated. In the third module, extracted features were fed into an ensemble classifier, which can be called as rotational support vector machine (RotSVM). The proposed classifier combines advantages of the principal component analysis and SVM to improve classification performances of the traditional SVM. The sensitivity and accuracy values across all subjects were 84.46% and 91.1%, respectively, for the five-stage sleep classification with Cohens kappa coefficient of 0.88. Obtained classification performance results indicate that, it is possible to have an efficient sleep monitoring system with a single-channel EEG, and can be used effectively in medical and home-care applications.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2018. Vol. 67, no 6, p. 1258-1265
Keywords [en]
Discrete wavelet transform (DWT); multiscale principal component analysis (MSPCA); rotational support vector machine (RotSVM); single-channel electroencephalogram (EEG); sleep stage classification
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:liu:diva-148087DOI: 10.1109/TIM.2018.2799059ISI: 000431903000001OAI: oai:DiVA.org:liu-148087DiVA, id: diva2:1211352
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-06-25

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Alickovic, Emina
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Automatic ControlFaculty of Science & Engineering
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CiteExportLink to record
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Citation style
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  • de-DE
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