The variable step-size wavelet transform-domain LMS adaptive filter algorithm

Document Type : Article

Authors

1 Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, P.O.Box: 16785-163, Tehran, Iran

2 Faculty of Science, Shahid Rajaee Teacher Training University, P.O.Box: 16785-163, Tehran, Iran

Abstract

In this paper, the wavelet transform domain least mean squares (WTDLMS) adaptive algorithm with variable
step-size (VSS) is established. The step-size changes according to the largest decrease in mean square deviation. To keep the computational complexity low, the Haar wavelet transform (HWT) is utilized as a transform. In addition, the mean square performance analysis of the VSS-WTDLMS is studied in the stationary and nonstationary environments and the theoretical relations for transient and steady-state performances are established. The simulation results show that the proposed VSS-WTDLMS has faster convergence rate and lower misadjustment than conventional WTDLMS. The theoretical relations are also verified by presenting various experimental results.

Keywords

Main Subjects

References

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Scientia Iranica
Volume 27, Issue 3
Transactions on Computer Science & Engineering and Electrical Engineering (D)
June 2020
Pages 1398-1412

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History

  • Receive Date: 27 April 2017
  • Revise Date: 25 November 2017
  • Accept Date: 11 August 2018

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