粗糙海底单基地散射和混响建模与仿真

王 松; 梁 红; 杨长生

doi:10.11993/j.issn.1673-1948.2014.01.012

粗糙海底单基地散射和混响建模与仿真

doi: 10.11993/j.issn.1673-1948.2014.01.012

西北工业大学航海学院, 陕西西安, 710072

基金项目: 国家自然科学基金(61273333)、(61379007)

详细信息

作者简介:
王松(1989-), 女, 硕士在读, 研究方向为信号与信息处理.

中图分类号: TJ631.2
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- 被引次数: 0
出版历程
- 收稿日期: 2013-11-14
- 修回日期: 2013-12-16
- 刊出日期: 2014-02-20

Modeling and Simulation of Monostatic Scattering and Reverberation for Rough Seafloor

College of Marine Engineering, Northwestern Ploytechnical University, Xi′an 710072, China

摘要

摘要: 长期以来, 混响强度计算主要采用基于简单的半经验性质的散射模型, 未能考虑环境参数。而实际上, 混响产生的过程中, 海底环境对混响至关重要。本文采用地声学海底交互模型(GABIM)将海底分为两层, 逐层计算界面散射和体积散射的散射截面, 得到海底散射强度的计算公式。在此基础上建立了一个海底混响强度随海底环境变化的单基地混响模型, 其采用单频信号仿真海底混响信号, 结果表明, 混响信号特性符合理论, 且改变环境参数混响也随之产生变化, 验证了该海底模型的可用性和环境适应性。
- 粗糙海底 /
- 海底散射 /
- 海底混响 /
- 单基地混响
Abstract: Reverberation strength calculation has long been based on the simple scattering model, which is semi-empirical in nature, without considering environmental parameters. In fact, environmental parameters impose im-portant effects on reverberation generation. In this paper, the geoacoustic bottom interaction model (GABIM) is utilized to divide seafloor into two layers, and the cross-sections for interfacial scattering and volumetric scattering in each layer are calculated to obtain the formula of seafloor scattering strength. Based on GABIM, a monostatic reverberation model is set up, in which bottom monostatic reverberation strength depends on seafloor environment. Single frequency signal is adopted in this model to simulate the seafloor reverberation signal. The results indicate that the reverberation signal is consistent with the reverberation theory, and its strength changes with the environmental parameter.
- rough seafloor /
- bottom scattering /
- bottom reverberation /
- monostatic reverberation

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参考文献(11)

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