Journal
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
Volume 79, Issue 3, Pages 189-195Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.cmpb.2005.04.001
Keywords
action surface EMG signal; wavetet packet transform; relative wavelet packet energy; pattern recognition; motor unit action potential
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Features can be classified into interferential features and discriminable features according to their contribution to pattern recognition. In this paper, a novel and simple method based on wavelet packet transform is proposed to extract the features from surface EMG signal. In this method, the features are relative wavelet packet energy (RWPE), which is evaluated from several selected frequency bands of surface EMG signal. Compared with a conventional method, which is of the best performance in previous applications, the method can compress the interferential features and enhance the discriminable features more effectively. In consequence, the RWPE features calculated by the method represent different patterns of surface EMG signal more accurately and the accuracy of surface EMG signal pattern classification is improved greatly. (c) 2005 Elsevier Ireland Ltd. All rights reserved.
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