基于空间谱域的分布式无源雷达成像性能分析  

Performance analysis of distributed passive radar imaging based on space-spectrum domain

作　　者：张舫瑞 尚社[1] 宋大伟[1] 范晓彦[1] ZHANG Fangrui;SHANG She;SONG Dawei;FAN Xiaoyan(China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2024年第2期53-59,共7页Space Electronic Technology

基　　金：国家重点实验室基金项目(编号:6142411342104)。

摘　　要：无源雷达成像即利用空间中存在的多个辐射源和接收站,同时对同一目标进行多角度成像,从而获取丰富的目标特征信息,它是当前雷达成像领域的研究热点之一。文章对无源雷达成像性能的影响因素进行分析,从多个辐射源、多个接收站和目标组成的空间三维构型出发,建立了目标回波模型,推导出回波数据与点散射函数之间存在的空间谱域映射关系。以北斗卫星辐射源为例,使用后向投影(back projection,BP)算法对多点目标进行成像仿真。仿真实验从辐射源与接收站数量、辐射源与接收站排布间隔以及辐射源与接收站构型三方面,有效验证了空间谱填充与成像质量的关系,为后续无源雷达成像系统的设计提供理论支撑。Passive radar imaging uses multiple transmitters and receivers to image the same target from multiple angles simultaneously,so that obtains rich information.It is one of the current research hotspots in the field of radar imaging.The paper analyzes the factors of passive radar imaging performance.Starting from the spatial three-dimensional configuration composed of multiple transmitters,multiple receivers and targets,the echo model is established,and the space-spectrum domain mapping relationship between the echo and the point scattering function is derived.Taking the BeiDou satellites transmitters as an example,the back projection algorithm is used to perform imaging on multiple point targets.Simulation experiments effectively verify the relationship between space-spectrum filling and imaging quality from three aspects:the number of transmitters and receivers,the arrangement interval of transmitters and receivers,and the configuration of transmitters and receivers.The paper provides theoretical support for the design of subsequent passive radar imaging systems.

关 键 词：空间谱域 无源雷达成像 多发多收 后向投影算法 

分 类 号：V443[航空宇航科学与技术—飞行器设计] TN958.97[电子电信—信号与信息处理]