An improved variable tap-length LMS algorithm

Authors:
Ning Li;Yonggang Zhang;Yuxin Zhao;Yanling Hao
Affiliations:
College of Automation, Harbin Engineering University, Harbin, Heilongjiang 150001, China;College of Automation, Harbin Engineering University, Harbin, Heilongjiang 150001, China;College of Automation, Harbin Engineering University, Harbin, Heilongjiang 150001, China;College of Automation, Harbin Engineering University, Harbin, Heilongjiang 150001, China
Venue:
Signal Processing
Year:
2009

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Abstract

An improved variable tap-length LMS algorithm is proposed in this paper. As compared with the original fractional tap-length LMS (FT-LMS) algorithm, the proposed algorithm can obtain both a fast convergence rate and a small steady-state error of the tap-length. Algorithm analysis is given which also provides a guideline for the parameter choice of the proposed algorithm. Simulations are performed under low noise and high noise conditions with time varying impulse responses. All simulation results show the advantages of the proposed algorithm as compared with the FT-LMS algorithm, and confirm the algorithm analysis.