极化MIMO雷达隐身目标检测性能研究  

Study on stealth target detection performance of polarimetric MIMO radar

作　　者：廖羽宇[1] 何子述[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《计算机应用研究》2012年第1期246-249,共4页Application Research of Computers

基　　金：国家自然科学基金联合基金资助项目(NSAF11076006)

摘　　要：多输入多输出(MIMO)雷达使用了远距分布的阵元,它利用了信号的空间分集增益来获取更多的目标信息。极化是另一种可以提高雷达系统性能的分集方式。当应对隐身目标时,传统的极化雷达在某些观测角度会遭受到较大的目标雷达截面积(RCS)衰减,而无法获得较好的检测性能。而在一个雷达系统中同时利用这两种分集增益,可以得到一种比传统极化雷达更具优势的新雷达检测系统——极化统计MIMO雷达,它可以更好地应对隐身目标检测。给出了相应的模型,并推导出了该雷达系统的检测性能解析式。将其与传统相控阵及非极化统计MIMO雷达比较,可以看到极化统计MIMO雷达的检测性能更佳。联系到隐身目标的特性,极化MIMO雷达的检测器特性应对它时具有显著优势。最后,以上方法通过仿真得到了验证。Multiple input multiple output（MIMO） radar with widely separated antennas exploited spatial diversity to obtain more information about target while polarimetric radar offered improved performance by exploiting polarization diversity.When detecting the stealth target in some observed angle,the tradition polarization radar would suffer big radar cross section（RCS） attenuation;therefore its detection performance could not be good enough.This paper proposed a radar system that combines the gains offered by polarimetric diversity and spatial diversity,namely polarimetric statistical MIMO radar,which further outperforms conventional polarization radar systems and could get better performance when detecting stealth target.It demonstrated the relevant model and derived the analysis formula of its detection performance.It is revealed that polarimetric statistical MIMO radar＇s detection performance is better than those of conventional phased array radar and non-polarimetric statistical MIMO radar.Considering the RCS characteristics of the stealth target,the detector properties of polarimetric MIMO radar have significant advantages.Finally,the results are verified by using simulations.

关 键 词：统计MIMO雷达 极化雷达 极化分集 空间分集 隐身目标 目标检测 

分 类 号：TN959.1[电子电信—信号与信息处理]