Title: Wavelet thresholding technique for sEMG denoising by baseline estimation

Authors: Luca Bartolomeo; Massimiliano Zecca; Salvatore Sessa; Atsuo Takanishi

Addresses: Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan. ' Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan. ' Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan. ' Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan

Abstract: The surface electromyography (sEMG) signal is affected by different sources of noises: current technology is considerably robust to the interferences of the power line or cable motion artefacts, but still there are many limitations in denoising the baseline. In this paper, we introduce a new technique, named baseline adaptive denoising algorithm (BADA), for denoising the sEMG signal by wavelet thresholding procedure. In particular, the thresholds are estimated using the same baseline signal with fixed and adaptive techniques. Eventually, we verify that the proposed adaptive method performs better than the standard Donoho technique and different variations, in terms of noise cancellation and distortion of the signal, quantified by a new suggested indicator of the denoising quality.

Keywords: wavelet denoising; surface electromyograms; sEMG; EMG signals; wavelet thresholding; baseline estimation; adaptive denoising; noise cancellation; signal distortion.

DOI: 10.1504/IJCAET.2012.049573

International Journal of Computer Aided Engineering and Technology, 2012 Vol.4 No.6, pp.517 - 534

Available online: 09 Oct 2012 *

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