在浅海均匀声场中，多途径传播的混响更接近实际条件下混响的统计特性。因此，本文对基于多途径利用与单元散射模型相结合的网络模型对海底混响信号进行了仿真分析，具有明确的物理意义。近年来关于海底混响的研究发现，其包络偏离瑞利分布，更趋向于K分布。对混响信号建模仿真的同时也对海底混响信号进行了统计分析，从频率特性和包络统计两方面验证方法的有效性。对实际海洋混响信号的研究以及基于混响背景下的其他方面研究具有较高的应用价值。
In uniform shallow water acoustic field, the multipath transmission reverberation is closer to the statistical properties in actual conditions. Therefore, in this paper, simulations of seabed reverberation signal are performed based on the network model combination of multipath using and cell scattering model, and has definite physical meaning. Studies of the bottom reverberation in recent years show that the envelope of the reverberation deviates from Rayleigh distribution, and tends to K-distribution. In this paper, statistical analysis on the bottom reverberation signal is made as well, verified the validity of the method from frequency characteristics and envelope statistics. The study in this paper has a high application value to the study of actual ocean reverberation signal and studies of other aspects based on reverberation background.
2016,(s1): 158-161 收稿日期：2016-07-30
DOI：10.3404/j.issn.1672-7619.2016.S1.029
分类号：TP391.9
作者简介：李思博(1993-),女,硕士研究生,研究方向为信号处理及信号检测。
参考文献：
[1] 姚万军, 蔡志明. 基于简正波的浅海混响序列仿真[J]. 声学技术, 2009, 28(1):25-28.YAO Wan-jun, CAI Zhi-ming. Simulation of reverberation sequence in shallow-water based on normal-mode theory[J]. Technical Acoustics, 2009, 28(1):25-28.
[2] 张明辉. 三维环境海洋混响强度衰减规律研究[D]. 哈尔滨:哈尔滨工程大学, 2005.ZHANG Ming-hui. Research on decaying law of oceanic reverberation intensity in three dimensions[D]. Harbin:Harbin Engineering University, 2005.
[3] 奥里雪夫斯基B B. 海洋混响的统计特性[M]. 罗耀杰, 译. 北京:科学出版社, 1977.OLSHEVSKII B B. Statistical characters of the ocean reverberation[M]. LUO Yao-jie, trans. Beijing:Publishing Company of Sciences, 1977.
[4] ABRAHAM D A, LYONS A P. Novel physical interpretations of K-distributed reverberation[J]. IEEE Journal of Oceanic Engineering, 2002, 27(4):800-813.
[5] 朱野. 主动声呐检测信息原理[M]. 北京:海洋出版社, 1990.ZHU Ye. Active sonar detection principle[M]. Beijing:Ocean Press, 1990.
[6] 蔡平, 梁国龙, 葛凤翔, 等. 界面混响信号的仿真研究[J]. 哈尔滨工程大学学报, 2000, 21(4):31-35.CAI Ping, LIANG Guo-long, GE Feng-xiang, et al. Research on the interface reverberation simulation[J]. Journal of Harbin Engineering University, 2000, 21(4):31-35.
[7] CHAMBERLAIN S, GALLI J. A model for numerical simulation of nonstationary sonar reverberation using linear spectral prediction[J]. IEEE Journal of Oceanic Engineering, 1983, 8(1):21-36.
[8] 董仲臣, 李亚安, 金彦丰. 鱼雷浅海海底混响建模与仿真[J]. 鱼雷技术, 2013, 21(2):100-104.DONG Zhong-chen, LI Ya-an, JIN Yan-feng. Shallow seafloor reverberation modeling and simulation of torpedo[J]. Torpedo Technology, 2013, 21(2):100-104.
[9] 郭熙业, 苏绍璟, 王跃科, 等. 收发合置情况下海底混响仿真[J]. 国防科技大学学报, 2010, 32(2):141-145.GUO Xi-ye, SU Shao-jing, WANG Yue-ke, et al. Research on simulating seafloor reverberation in the case of monostatic[J]. Journal of National University of Defense Technology, 2010, 32(2):141-145.
