An Adaptive Algorithm with Variable Step-Size for Parallel Notch Filter (Digital Signal Processing)

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概要

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• A parallel notch filter (PNF) for eliminating a sinusoidal signal whose frequency and phase are unknown, has been proposed previously. The PNF achieves both fast convergence and high estimation accuracy when the step-size for adaptation is appropriately determined. However, there has been no discussion of how to determine the appropriate stepsize. In this paper, we derive the convergence condition on the step-size, and propose an adaptive algorithm with variable step-size so that convergence of the PNF is automatically satisfied. Moreover, we present a new filtering structure of the PNF that increases the convergence speed while keeping the estimation accuracy. We also derive a variable step-size scheme for the new PNF to guarantee the convergence. Simulation results show the effectiveness of the proposed method.

• 社団法人電子情報通信学会の論文
• 2006-02-01

著者

• ITOH Yoshio

  the Faculty of Engineering, Tottori University

• Itoh Y

  Faculty Of Engineering Tottori University

• Itoh Yoshio

  Faculty Of Engineering Tottori University

• Itoh Yoshio

  Fac. Of Engineering Tottori Univ.

• Kawamura Arata

  Osaka Univ. Osaka Jpn

• Kawamura Arata

  The Graduate School Of Engineering Science Osaka University

• Iiguni Youji

  Osaka Univ. Toyonaka‐shi Jpn

• Itoh Y

  Tottori Univ. Tottori‐shi Jpn

• IIGUNI Youji

  the Graduate School of Engineering Science, Osaka University

• Kawamura Arata

  Department Of Systems Innovation Graduate School Of Engineering Science Osaka University

• 干場 圭太郎

  the Graduate School of Engineering Science, Osaka University

• 川村 新

  the Graduate School of Engineering Science, Osaka University

• 飯國 洋二

  the Faculty of Engineering, Tottori University

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