分布式相参雷达相参效率及相参景深研究  

Research on coherent synthesis efficiency and coherent depth of field of distributed coherent aperture radar

作　　者：王元昊 王宏强[1] 刘兴华 曾旸 杨琪 WANG Yuanhao;WANG Hongqiang;LIU Xinghua;ZENG Yang;YANG Qi(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;Center for Information Research,Academy of Military Sciences,Beijing 100142,China;State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,Luoyang 471003,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073 [2]军事科学院军事科学信息研究中心,北京100142 [3]电子信息系统复杂电磁环境效应国家重点实验室,河南洛阳471003

出　　处：《系统工程与电子技术》2024年第5期1573-1582,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61871386,62035014,61921001)资助课题。

摘　　要：分布式相参雷达(distributed coherent aperture radar,DCAR)所发射信号仅能在感兴趣点处完全相参叠加,在一定发射相参效率约束下,因相参位置失配会出现能量弥散现象。对此,定义“相参景深”用以描述该能量弥散现象,并给出相参景深形成原因,指出其有界性和周期性特征,分析其影响因素,以具象化和定量化的方式揭示发射相参效率空间分布规律,可有效支撑DCAR发射信号参数和阵列构型选择等工程实践。最后,以多节点单元雷达的DCAR设计仿真实验,证明了所提方法的有效性。The signals transmitted by distributed coherent aperture radar(DCAR)can only be completely coherently superimposed at the point of interest.Under the constraint of transmit coherent efficiency,energy dispersion phenomenonmay occur due to mismatched coherence positions.In this regard,the definition of“coherent depth of field”is used to describe the phenomenon of energy dispersion,and the reasons for the formation of coherent depth of field are given.Its bounded and periodic characteristics are pointed out,and its influencing factors are analyzed.The spatial distribution law of transmit coherent efficiency is revealed in a concrete and quantitative way,which can effectively support engineering practices such as the selection of DCAR transmission signal parameters and array configurations.Finally,the effectiveness of the proposed method is demonstrated through simulation experiments of DCAR design using multi node unit radars.

关 键 词：分布式相参雷达 发射相参效率 相参景深 分布式发射波束形成 

分 类 号：TN957.3[电子电信—信号与信息处理]