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Investigation of Range Profiles from a Simplified Ship on Rough Sea Surface and Its Multipath Imaging Mechanisms

机译:粗海表面上简化船舶范围剖面的调查及其多径成像机制

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摘要

The range profiles of a two-dimension (2 D) perfect electric conductor (PEC) ship on a wind-driven rough sea surface are derived by performing an inverse discrete Fourier transform (IDFT) on the wide band backscattered field. The rough sea surface is assuming to be a PEC surface. The back scattered field is computed based on EM numerical simulation when the frequencies are sampled between 100 MHz and 700 MHz. Considering the strong coupling interactions between the ship and sea, the complicated multipath effect to the range profile characteristics is fully analyzed based on the multipath imaging mechanisms. The coupling mechanisms could be explained by means of ray theory prediction and numerical extraction of the coupling currents. The comparison of the range profile locations between ray theory prediction and surface current simulation is implemented and analyzed in this paper. Finally, the influence of different sea states on the radar target signatures has been examined and discussed.
机译:通过在宽带反向散射场上执行逆离散的傅里叶变换(IDFT),通过执​​行宽带反向散射场的逆离散傅里叶变换(IDFT)来导出在风驱动粗糙海面上的两维(2d)完美的电导体(PEC)船的范围轮廓。粗糙的海面正在假设是PEC表面。当频率在100 MHz和700MHz之间采样时,基于EM数值模拟计算后散射场。考虑到船舶和海洋之间的强耦合相互作用,基于多径成像机制充分分析了对范围谱特性的复杂多径效应。耦合机构可以通过光线理论预测和耦合电流的数值提取来解释。在本文中实现和分析了光线理论预测和表面电流模拟之间的范围轮廓位置的比较。最后,研究过并讨论了不同海区对雷达目标签名的影响。

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