基于双极化融合的外辐射源雷达实验分析

发布时间：2018-01-04 20:32

本文关键词：基于双极化融合的外辐射源雷达实验分析　出处：《现代雷达》2017年10期 　论文类型：期刊论文

【摘要】：雷达极化学揭示了电磁波与目标相互作用的变极化效应,充分挖掘和利用目标极化信息,对提高雷达探测性能具有重要意义。文中对在外辐射源雷达(PBR)探测中利用双极化特征提高探测性能进行了研究。首先,对目标和城区杂波的PBR双极化特性分别进行了仿真计算与实测分析,得到了其交叉极化分量与共极化分量之间的大小关系,为PBR中双极化技术应用提供了基础;然后,根据无源相干定位技术推导了PBR探测公式,揭示了其与目标双站距离、极化散射特性、多普勒频率之间的关系;最后,根据实验结果具体分析了双极化技术对PBR探测性能改善情况。研究表明,由于双极化探测更充分、有效地利用了目标自身极化散射特性,并用交叉极化方式有效抑制了杂波,所以采用双极化融合技术能有效提高PBR探测性能。
[Abstract]:Radar polar chemistry reveals the variable polarization effect of the interaction between electromagnetic wave and target, and fully excavates and utilizes the target polarization information. It is of great significance to improve the detection performance of radar. In this paper, the dual polarization feature is used to improve the detection performance in the detection of external emitter radar (PBR). First of all. The PBR bipolarization characteristics of target and urban clutter are simulated and measured, and the relationship between cross-polarization component and co-polarization component is obtained. It provides the foundation for the application of dual polarization technology in PBR. Then, according to the passive coherent localization technique, the PBR detection formula is derived, and the relationship between the PBR detection formula and the bistatic distance, polarization scattering characteristics and Doppler frequency of the target is revealed. Finally, based on the experimental results, the improvement of PBR detection performance by dual-polarization technique is analyzed. The results show that the dual-polarization detection is more effective because of the polarization scattering characteristics of the target. The clutter is effectively suppressed by cross polarization, so the dual polarization fusion technique can effectively improve the detection performance of PBR.
【作者单位】：电子信息系统复杂电磁环境效应国家重点实验室;
【基金】：国家自然科学基金资助重大项目(61490692)
【分类号】：TN958
【正文快照】： 0引言极化作为电磁波的本质属性,是幅度、频率、相位以外的重要基本参量,描述了电场矢端在传播截面上随时间变化的轨迹特征[1-3]。对雷达而言,极化是电磁波除时域、频域和空域信息外的又一可以利用的重要信息。充分挖掘和利用极化信息对提高雷达的目标探测能力具有重要意义。

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