Fast communication: A new variable step-size NLMS algorithm designed for applications with exponential decay impulse responses

Authors:
Ning Li;Yonggang Zhang;Yanling Hao;Jonathon A. Chambers
Affiliations:
College of Automation, Harbin Engineering University, Harbin 150001, China;College of Automation, Harbin Engineering University, Harbin 150001, China and Department of Electronic and Electrical Engineering, Loughborough University, Leicestershire LE11 3TU, UK;College of Automation, Harbin Engineering University, Harbin 150001, China;Department of Electronic and Electrical Engineering, Loughborough University, Leicestershire LE11 3TU, UK
Venue:
Signal Processing
Year:
2008

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Abstract

A new variable step-size normalized least mean square algorithm (VSSNLMS) is proposed which is designed for applications where the unknown filter has an exponential decay impulse response. In the proposed algorithm a variable vector step size is used on the basis of maximizing the decrease of the mean square deviation (MSD) between the optimal and adaptive filter weight vectors at each iteration. Faster convergence rate of the resulting algorithm as compared with existing VSSNLMS algorithms is supported by simulations.