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Journal of Emerging Trends in Computing and Information Sciences >> Call for Papers Vol. 8 No. 3, March 2017

Journal of Emerging Trends in Computing and Information Sciences

An Uncorrelated Variable Step-size LMS Adaptive Algorithm

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Author Qi Zhang, Yuancheng Yao, Mingwei Qin
ISSN 2079-8407
On Pages 1506-1508
Volume No. 3
Issue No. 11
Issue Date December 01, 2012
Publishing Date December 01, 2012
Keywords LMS; variable step-size; uncorrelated


Abstract

In this paper, we discuss and analyze two variable step-size adaptive algorithms in which the performance is reduced when input signal are highly correlated with each other. As a result, we propose an uncorrelated variable step-size LMS adaptive algorithm in order to overcome that shortcoming. The main idea of this algorithm is to pretreat input signal by decor relation then use this pretreated signal to update weight vector of the adaptive filter. Due to the theory of correlation, the algorithm can achieve good convergence rate. Finally, the simulations are consistent with the theoretical analysis. 

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