| 粗糙海底波导中信号的时间反转时空聚焦 |
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| 引用本文： | 于小涛,彭临慧,郭双乐.粗糙海底波导中信号的时间反转时空聚焦[J].中国海洋大学学报(自然科学版),2012(Z2):178-182. |
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| 作者姓名： | 于小涛 彭临慧 郭双乐 |
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| 作者单位： | 中国海洋大学信息科学与工程学院 |
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| 基金项目： | 声纳技术国防科技重点实验室开放基金项目(KF201005);国家自然科学基金项目(46976019)资助 |
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| 摘 要： | 对粗糙海底波导中信号的时间反转时空聚焦进行仿真研究。利用数值计算分析不同海底粗糙度RMS(平均起伏高度)下的聚焦效果,并与平整海底时作比较。研究结果表明:在本研究计算参数范围内,粗糙海底的RMS越大散射强度越大,信号在声源处的时间反转时空聚焦效果比平整海底时稍有减弱,但随着RMS增大无明显减弱。因此,时间反转技术适用于粗糙海底波导中的目标探测。
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| 关 键 词： | 粗糙海底 散射场 时间反转 时空聚焦 |
Spatio-Temporal Focusing of Signals in a Waveguide with Rough Bottom by Time Reversal |
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| YU Xiao-Tao,PENG Lin-Hui,GUO Shuang-Le.Spatio-Temporal Focusing of Signals in a Waveguide with Rough Bottom by Time Reversal[J].Periodical of Ocean University of China,2012(Z2):178-182. |
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| Authors: | YU Xiao-Tao PENG Lin-Hui GUO Shuang-Le |
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| Institution: | (College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | The spatio-temporal focusing of signals propagating in a rough bottom waveguide with time reversal technique was simulated.The focusing capability for a bottom with different RMS(root mean square of roughness height) was also analyzed by numerical calculation,and was compared with the capability for a smooth bottom.The result show that within the parameters calculated in this paper,the larger the RMS of the rough bottom becomes,the greater the scattering intensity is.The spatio-temporal focusing capability at the source is a little decreased compared with the smooth bottom,but do not decrease significantly with the RMS increasing.Therefore,the time reversal technique can be applied to targets detection in a waveguide with rough bottom. |
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| Keywords: | rough bottom scattering field time reversal spatio-temporal focusing |
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