分布式无源雷达成像及其空间谱特性分析  

Analysis of Distributed Passive Radar Imaging and Space-spectrum Property

作　　者：徐浩[1] 刘畅畅[1] 何学智[1] 王东进[1] 陈卫东[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《现代雷达》2011年第9期42-47,共6页Modern Radar

基　　金：国家自然科学基金资助项目(61172155);中国博士后科学基金资助项目(20090460726)

摘　　要：针对随机分布辐射源、分布式接收雷达以及目标构成的三维空间构型,推导了基于单频辐射信号的一次快拍成像公式,提出了球坐标系统下的分布式无源雷达成像方法,并在空间谱域探讨了成像分辨率特性及其影响因素。以GPS辐射源为例仿真验证了文中成像方法的有效性,并根据空间谱填充效果对比,分析了收发空间构型和数目等因素对成像的影响,为探索利用GPS等分布式非合作辐射源实现无源成像提供了一条可能的途径。The 3-D space formation composed of distributed radiation sources, distributed receivers and targets is discussed in this paper. At one snapshot, the imaging formula based on single-frequency radiation signal is derived in detail. Then the distributed passive radar imaging method in spherical coordinate system is proposed, and the imaging resolution and its influencing factors is discussed in space-spectrum. Computer simulation using GPS radiation signal confirms the feasibility of the method. Based on the comparison of space-spectrum filling results, we analyse the impact of space configuration and the number of transceivers on the im- aging is analysed, which provides a feasible way for passive radar ima^inm

关 键 词：无源雷达成像 球坐标系统 空间谱填充 成像分辨率 

分 类 号：TN958.97[电子电信—信号与信息处理]