叶簇穿透合成孔径雷达最佳极化方式试验研究  

Experimental study of optimal polarization for foliage penetration SAR

作　　者：姚佰栋 赵宁[1,2] 葛家龙 钟雪莲[1,2] YAO Baidong;ZHAO Ning;GE Jialong;ZHONG Xuelian(No.38 Research Institute,China Electronic Technology Group Corporation,Hefei 230088,China;Key Laboratory of Aperture Array and Space Application,Hefei 230088,China)

机构地区：[1]中国电子科技集团有限公司第38研究所,合肥230088 [2]孔径阵列与空间应用重点实验室,合肥230088

出　　处：《空军预警学院学报》2020年第1期1-4,10,共5页Journal of Air Force Early Warning Academy

基　　金：科技部国际合作专项项目(2015DFA10270)。

摘　　要：针对不同叶簇类型区域的隐蔽目标检测问题,利用飞行试验对比了圆/线极化P波段SAR系统在单冠和多冠2种叶簇类型覆盖下的目标探测性能,并对叶簇下目标信杂比(SCR)进行了量化分析.研究结果表明,对于单冠叶簇类型,HH极化目标具有最佳探测性能,VV极化次之,而受不同极化雷达波叶簇双程衰减及背景杂波的影响,HV、VH和4种圆极化的探测性能相对较差;对于多冠叶簇类型,4种圆极化均表现出良好的隐蔽目标探测性能,其中RR、LL极化最佳,RL、LR极化背景杂波相对较强,4种线极化图像中叶簇杂波较强,目标信杂比不高.这为叶簇穿透SAR系统设计和探测效能提升提供了参考.In order to solve the problem of detecting hidden targets in the area with different types of foliage clusters,this paper utilizes flight test to compare the detection performance of the target of the linear/circular polarized P-band SAR system in the area with two types of foliage clusters:single and double canopy,and also makes a quantitative analysis on the target signal-to-clutter ratio(SCR)under the cover of foliage clusters.The results show that HH polarization targets have the best detection performance for single-canopy foliage clusters,followed by VV polarization,however,the detection performance of HV,VH and four circular polarizations is relatively poor due to the influence of the two-path attenuation and background clutter of the foliage cluster of different polarized radar waves;for the types of double-canopy foliage clusters,the four circular polarizations all present good detection performance of hidden targets,among which RR and LL polarization are the best,and RL and LR polarization background clutter are relatively strong;of the four types of linear polarized images,the clutter in the middle lobe is strong,and the target SCR is not high.This provides a reference for the design and detection efficiency improvement of foliage cluster penetrating SAR system.

关 键 词：P波段SAR 线/圆极化 单冠/多冠叶簇 穿透成像 

分 类 号：TN959[电子电信—信号与信息处理]