基于时间反转镜的宽带匹配场处理
Broad band matched field processing technique basing on time-reversal
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摘要: 声场的互易性和线性波动方程的时反不变性能用时间反转来代替频域的相位共轭。因此,时间反转技术可以应用于宽带的匹配场处理中。时间反转匹配场处理时,仍然需要知道海洋环境的先验知识,例如声场的声速分布,海洋边界条件等等。文章对时间反转应用于匹配场处理进行了仿真并分析海上试验数据。仿真和试验数据分析结果表明:该套时间的反转处理方法可以实现匹配场定位,定位精度较高,而且多元阵信号处理的增益也十分明显。Abstract: The phase conjugate in the frequency domain is usually replaced with time-reversal for time reversal invariance of linear wave equation and interchange of acoustic field.Therefore the time reversal technique can be applied to the matched field processing.As MFP,matched field processing with time reversal(TR-MFP) is influenced by oceanic environmental information such as the sound speed profile and boundary conditions.In this paper,Matched field processing with time reversal technique is studied and analyzed with simulation and experimental data.Computer simulation and sea-test data show that the time-reversal technology is effective in target localization with good precision and clear array gain.
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