Non-uniform norm constraint estimation algorithm for underwater acoustic channels at the presence of varying sparsity

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	Non-uniform norm constraint estimation algorithm for underwater acoustic channels at the presence of varying sparsity
	Wu, Fei-Yun ; Zhou, Yue-Hai ; Tong, Feng ; Fang, Shi-Liang ; Tong F(童峰)
刊名	http://dx.doi.org/10.3969/j.issn.1000-1093.2014.09.025
	2014
关键词	Acoustics Algorithms Channel estimation Frequency estimation Numerical methods
英文摘要	For the typical underwater acoustic channels with time-frequency double extension characteristics, the channel estimation performance can be improved by introducing a norm constraint into the channel estimation algorithm based on the sparse distribution feature of the channels. However, at the presence of varying multipath structure caused by change of depth or velocity gradient, the classic l0 or l1 norm constraint methods are subject to performance degradation due to lack of adaptability to sparsity. A previously derived non-uniform norm constraint LMS (NNCLMS) algorithm is introduced, and then a convergence analysis is made on it. In the form of non-uniform norm, the NNCLMS algorithm is used to accommodate the different sparsities caused by different multipath structures. Numerical simulation and sea experimental results show that the estimation performance of the proposed method is superior to that of the classic l0 or l1 norm constraint algorithm.
语种	英语
出版者	China Ordnance Society
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88275]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Wu, Fei-Yun,Zhou, Yue-Hai,Tong, Feng,et al. Non-uniform norm constraint estimation algorithm for underwater acoustic channels at the presence of varying sparsity[J]. http://dx.doi.org/10.3969/j.issn.1000-1093.2014.09.025,2014.
APA	Wu, Fei-Yun,Zhou, Yue-Hai,Tong, Feng,Fang, Shi-Liang,&童峰.(2014).Non-uniform norm constraint estimation algorithm for underwater acoustic channels at the presence of varying sparsity.http://dx.doi.org/10.3969/j.issn.1000-1093.2014.09.025.
MLA	Wu, Fei-Yun,et al."Non-uniform norm constraint estimation algorithm for underwater acoustic channels at the presence of varying sparsity".http://dx.doi.org/10.3969/j.issn.1000-1093.2014.09.025 (2014).