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The Initial Value Setting-Up Method for Extending the Range of the Optimal Step Parameter under LMS Algorithm  

Cho, Ki-Ryang (여수대학교 전자통신공학과)
An, Hyuk (여수대학교 전자통신공학과)
Choo, Byoung-Yoon (여수대학교 전산정보원)
Lee, Chun-Jae (남양정보기술(주))
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.2, 2003 , pp. 284-292 More about this Journal
Abstract
In this paper, we carried out the numerical examination of the initial value setting-up method to extend the range of optimal step parameter in a adaptive system which is controlled by LMS algorithm. For initial value setting-up methods, the general method which select the initial value randomly and the other method which applies the approximate value obtained from the direct method to initial value, were used. And then, we compared to the ranges of step parameter setting, the convergence speeds of mean-square-error, and the stabilities during the convergence process when the initial values were applied to the optimal directivity synthesis problem. According to the numerical simulation results, the initial value setting-up method by means of the direct method provides wider range for the step parameter, more efficient capability for convergence and stability, and more error correction ability than the general method.
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