对于水下无人系统跟踪定位、水声通信等技术而言，水声信道估计的实时性至关重要。本文首先简要分析了水声在浅海中的传播特性及信道模型，包括声速建模、传播衰减建模及本征声线的搜索模型；其次为了满足水声信道估计实时性的要求，基于GPU利用OpenCL环境进行仿真实现。最后通过结果分析，说明了本文对于水声信道的建模合理正确，同时也满足了实时性这一要求。
The real-time performance of underwater acoustic channel estimation is very important for target tracking and positioning, underwater acoustic communication and other technologies. Firstly, this paper analyzes the propagation characteristics and models of underwater acoustic in shallow sea. Including sound velocity modeling, propagation decay modeling and the search model of the eccentric line. Secondly, this paper is based on the GPU and uses the OpenCL environment to realize the simulation. From the analysis of the results, it is proved that the modeling of the underwater eccentric line is reasonable and correct. At the same time, it fulfill the requirement of the real-time performance.
2017,(): 100-104 收稿日期：2017-06-21
DOI：10.3404/j.issn.1672-7649.2017.12.021
分类号：TN911.7
作者简介：白敬贤(1994-),男,硕士研究生,研究方向为信号与信息处理
参考文献：
[1] 兰英, 章新华, 熊鑫. 浅海水声多途信道建模与仿真[J]. 舰船科学技术, 2010, 32 (9): 120-122.
LAN Ying, ZHANG Xin-hua, XIONG Xin. Modeling and simulation on shallow water acoustic multi-path channels[J]. Ship Science and Technology, 2010, 32 (9): 120-122.
[2] 蒋德军, 胡涛. 时延估计技术及其在多途环境中的应用[J]. 声学学报.2001, 26(1): 34-40.
JIANG De-jun, HU Tao. Time-delay estimation and its application in multipath environment[J]. Journal of Acoustics.2001, 26(1): 34-40.
[3] CHEN J T, PAULRAJ A, REDDY U.Multichannel maximum-likelihood sequence estimation(MLSE) equalizer for GSM using a parametric channel model[J].Communications, IEEE Transactions on, 1999, 47(1): 53-63.
[4] CHAMPAGNE B, EIZENMAN E, PASUPATHY S.Exact maximum likelihood time delay estimation for short observation intervals[J].Signal Processing, IEEE Transactions on, 1991, 39(6): 1245-1257.
[5] MANICKAM T G, VACCARO R J, TUFTS D W.A least-squares algorithm for multipath time-delayestimation[J].Signal Processing, IEEE Transactions on, 1994, 42(11): 3229-3233.
[6] WU R, LI J.Time-delay estimation via optimizing highly oscillatory cost functions[J].Oceanic Engineering, IEEE Journal of, 1998, 23(3): 235-244.
[7] EVANS A, FISCHL R.Optimal least squares time-domain synthesis of recursive digital filters[J].Audio and Electroacoustics, IEEE Transactions on, 1973, 21(1): 61-65.
[8] SCHMIDT R O.Multiple emitter location and signal parameter estimation[J].Antennas and Propagation, IEEE Transactions on, 1986, 34(3): 276-280.
[9] FEDER M, WEINSTEIN E.Parameter estimation of superimposed signals using the EM algorithm[J].Acoustics, Speech and Signal Processing, IEEE Transactions on, 1988, 36(4): 477-489.
[10] SENMOTO S, CHILDERS D G.Signal resolution via digital inverse filtering[J].Aerospace and Electronic Systems, IEEE Transactions on, 1972 (5): 633-640.
[11] 林旺生. 水声信道仿真与声线修正技术研究[D]. 哈尔滨: 哈尔滨工程大学, 2009.
[12] 欧晓丽. 水声信道建模及其仿真平台的实现[D]. 厦门: 厦门大学, 2007.
[13] 王百合, 冯西安, 黄建国, 等.一种分层海洋中求取本征声线的新方法[J].微处理机, 2006, (1): 63-65.
WANG Bai-he, FENG Xi-an, HUANG Jian-guo, et al. A new method for finding the intrinsic line of sound in a layered ocean [J].Microprocessor, 2006, (1): 63-65.
[14] 魏莉, 许芳, 孙海信.水声信道的研究与仿真[J].声学技术, 2008, (01): 25-29.
WEI Li, XU Fang, SUN Hai-xin.Research and simulation of underwater acoustic channel [J].Acoustics, 2008, (01): 25-29.
[15] 陈钢, 吴百锋. 面向OpCHEN Gang, WU Bai-feng. GPU performance optimization for OpenCL model [J]. Journal of Computer Aided Design and Graphics, 2011, 23 (4): 571-581.CL模型的GPU性能优化[J]. 《计算机辅助设计与图形学学报》, 2011, 23 (4): 571-581.
CHEN Gang, WU Bai-feng. GPU performance optimization for OpenCL model [J]. Journal of Computer Aided Design and Graphics, 2011, 23 (4): 571-581.
