认知频控阵雷达对随队假目标的动态零陷形成研究  

Research on the Dynamic Nulling Formation of Cognitive FDA Radar for the Accompanying False Targets

作　　者：赵英健 田波[1] 王春阳[1] 谭铭 周长霖 刘明杰 ZHAO Yingjian;TIAN Bo;WANG Chunyang;TAN Ming;ZHOU Changlin;LIU Mingjie(Air Force Engineering University,Air and Missile Defense College,Xi’an,Shaanxi 710051,China;National University of Defense Technology,College of Information and Communication,Wuhan,Hubei 430010,China)

机构地区：[1]空军工程大学,防空反导学院,陕西西安710051 [2]国防科技大学,信息通信学院,湖北武汉430010

出　　处：《信号处理》2021年第10期1977-1985,共9页Journal of Signal Processing

基　　金：陕西省自然科学基金(2021JM-222);中国博士后科学基金(2019M662257)。

摘　　要：电子战环境中,随队支援式假目标可在雷达照射主瓣内做非线性运动,这对基于相控阵体制的雷达实时地将波束零点对准假目标位置造成了困难。针对这一问题,提出一种基于频控阵雷达的动态零陷形成技术,系统通过从环境中提取干扰假目标距离信息,之后结合认知技术利用扩展卡尔曼滤波器获得假目标运动的外推轨迹,并将预测信息通过反馈回传至雷达发射模块,通过频控阵距离维波束形成技术调整发射权矢量使得波束零点指向干扰源预测位置。仿真结果表明:所提方法可以有效地实施对主瓣内运动的欺骗式假目标动态零陷,相比于不基于预测信息的波束形成技术具有显著的性能优势,为频控阵雷达抗主瓣欺骗式干扰提供了技术支持,在阵列信号处理方面具有一定的理论和实际意义。In the electronic warfare environment,the accompanying false target can move nonlinearly in the main lobe of radar,which makes it difficult for beam nulling to aim at the false target position in time under the phased array system.To solve this problem,a dynamic nulling technique based on frequency diverse array(FDA)radar is proposed.The system extracts the range information of false target from the environment,and then obtains the extrapolation trajectory of false target by using the extended Karman algorithm combined with cognitive technology,and transmits the prediction information back to the transmit module of radar through feedback.Then the adaptive beamforming in range dimension based on FDA is adopt to adjust the transmit weight vector so that the beam nulling can point to the predicted position of the false target.The simulation results show that the proposed method can effectively achieve the dynamic nulling of the moving false target in the main lobe of radar.It has significant performance advantages compared with adaptive beamforming without prediction information,providing technical support for FDA to resist the main lobe deceptive interference.And it has certain theoretical and practical significance in array signal processing.

关 键 词：频控阵 认知雷达 自适应波束形成 

分 类 号：TN953[电子电信—信号与信息处理]