Non-Uniform Norm Constraint LMS Algorithm for Sparse System Identification

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	Non-Uniform Norm Constraint LMS Algorithm for Sparse System Identification
	Wu, F. Y. ; Tong, F. ; Tong F(童峰)
刊名	http://dx.doi.org/10.1109/LCOMM.2013.011113.121586
	2013
英文摘要	National Natural Science Foundation of China [11274259]; Specialized Research Fund for the Doctoral Program of Higher Education of China [20120121110030]; Sparsity property has long been exploited to improve the performance of least mean square (LMS) based identification of sparse systems, in the form of l0-norm or l1-norm constraint. However, there is a lack of theoretical investigations regarding the optimum norm constraint for specific system with different sparsity. This paper presents an approach by seeking the tradeoff between the sparsity exploitation effect of norm constraint and the estimation bias it produces, from which a novel algorithm is derived to modify the cost function of classic LMS algorithm with a non-uniform norm (p-norm like) penalty. This modification is equivalent to impose a sequence of l0-norm or l1-norm zero attraction elements on the iteration according to the relative value of each filter coefficient among all the entries. The superiorities of the proposed method including improved convergence rate as well as better tolerance upon different sparsity are demonstrated by numerical simulations.
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87887]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Wu, F. Y.,Tong, F.,Tong F. Non-Uniform Norm Constraint LMS Algorithm for Sparse System Identification[J]. http://dx.doi.org/10.1109/LCOMM.2013.011113.121586,2013.
APA	Wu, F. Y.,Tong, F.,&童峰.(2013).Non-Uniform Norm Constraint LMS Algorithm for Sparse System Identification.http://dx.doi.org/10.1109/LCOMM.2013.011113.121586.
MLA	Wu, F. Y.,et al."Non-Uniform Norm Constraint LMS Algorithm for Sparse System Identification".http://dx.doi.org/10.1109/LCOMM.2013.011113.121586 (2013).