Compressed sensing estimation of sparse underwater acoustic channels with a large time delay spread

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	Compressed sensing estimation of sparse underwater acoustic channels with a large time delay spread
	Wu, Feiyun ; Zhou, Yuehai ; Tong, Feng ; Fang, Shiliang ; Tong F(童峰)
刊名	http://dx.doi.org/10.3969/j.issn.1003-7985.2014.03.003
	2014
关键词	Compressed sensing Computational complexity Image communication systems Impulse response Iterative methods Matrix algebra Signal reconstruction Time delay
英文摘要	The estimation of sparse underwater acoustic channels with a large time delay spread is investigated under the framework of compressed sensing. For these types of channels, the excessively long impulse response will significantly degrade the convergence rate and tracking capability of the traditional estimation algorithms such as least squares (LS), while excluding the use of the delay-Doppler spread function due to huge computational complexity. By constructing a Toeplitz matrix with a training sequence as the measurement matrix, the estimation problem of long sparse acoustic channels is formulated into a compressed sensing problem to facilitate the efficient exploitation of sparsity. Furthermore, unlike the traditional l1 norm or exponent-based approximation l0 norm sparse recovery strategy, a novel variant of approximate l0 norm called AL0 is proposed, minimization of which leads to the derivation of a hybrid approach by iteratively projecting the steepest descent solution to the feasible set. Numerical simulations as well as sea trial experiments are compared and analyzed to demonstrate the superior performance of the proposed algorithm. ? Copyright.
语种	英语
出版者	Southeast University
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88268]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Wu, Feiyun,Zhou, Yuehai,Tong, Feng,et al. Compressed sensing estimation of sparse underwater acoustic channels with a large time delay spread[J]. http://dx.doi.org/10.3969/j.issn.1003-7985.2014.03.003,2014.
APA	Wu, Feiyun,Zhou, Yuehai,Tong, Feng,Fang, Shiliang,&童峰.(2014).Compressed sensing estimation of sparse underwater acoustic channels with a large time delay spread.http://dx.doi.org/10.3969/j.issn.1003-7985.2014.03.003.
MLA	Wu, Feiyun,et al."Compressed sensing estimation of sparse underwater acoustic channels with a large time delay spread".http://dx.doi.org/10.3969/j.issn.1003-7985.2014.03.003 (2014).