Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2015, Vol. 38 ›› Issue (4): 81-85.doi: 10.13190/j.jbupt.2015.04.017

• Papers • Previous Articles     Next Articles

A Modified l0_LMS Algorithm and Its Performance Analysis

GUAN Si-hai, LI Zhi   

  1. School of Electromechanical Engineering, Xidian University, Xi'an 710071, China
  • Online:2015-08-28 Published:2015-07-03

Abstract:

A new variable step-size l0_least mean square (LMS) algorithm is proposed. A step size control method and the zero attraction items reweight method based on correlation function value of the error to increase the convergence speed, and reduce the steady-state misalignment. The anti-noise performance, convergence, tracking steady state error and misadjustment of this algorithm are discussed in theoretical analysis. Finally, the algorithm is compared with l0_LMS and Il0_LMS in different signal-to-noise ratio. Theoretical analysis combined with experimental simulation conclusion: the algorithm can achieve better tracking speed, lower steady state error and anti-noise performance.

Key words: variable step-size, least mean square based on l0 norm, tracking speed, anti-noise