主瓣伴随干扰下数字子阵雷达和差波束测角方法  

Digital Sub-Array Radar Sum-Difference DOA Estimation Method in the Presence of Mainlobe Following Jamming

作　　者：余显祥 严正欣 潘步年 汪兵 崔国龙 YU Xianxiang*;YAN Zhengxin;PAN Bunian;WANG Bing;CUI Guolong(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731;Southwest China Research Institute of Electronic Equipment,Chengdu 610036)

机构地区：[1]电子科技大学信息与通信工程学院,成都611731 [2]中国电子科技集团第二十九研究所,成都610036

出　　处：《电子科技大学学报》2023年第4期498-505,共8页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(U19B2017,62101097);中国博士后科学基金(2020M680147,2021T140096)。

摘　　要：针对数字子阵体制雷达在强主瓣干扰存在情况下弱目标的到达方向DOA估计问题,提出了一种和差波束测角方法。首先,建立了多子阵和差波束结构下的主瓣干扰与目标回波的接收模型。然后,根据目标回波与干扰信号在时域上的不相关特性,对每个子阵列采用盲源分离算法分离目标回波与干扰信号,进而联合各子阵分离的目标回波/干扰信号,采用单脉冲测角技术实现目标/干扰DOA估计。最后,通过数值仿真实验验证了分析算法的有效性及性能。Aiming at the estimation problem of the Direction of Arrival(DOA)of weak targets in the presence of strong mainlobe interference for digital sub-array radar,this paper proposes a sum-difference beam angle measurement method.Firstly,a receiving model of the mainlobe interference and target echo under the multi-subarray sum-difference beam structure is established.Then,according to the uncorrelated characteristics of the target echo and the interference signal in the time domain,blind source separation is used for each sub-array to separates the target echo and interference signal,and monopulse angle measurement technology is used to achieve target/interference DOA estimation via combining the target echo/interference signal separated by each sub-array.Finally,the effectiveness and analysis performance of this method is verified by numerical simulation experiment.

关 键 词：盲源分离 数字子阵 DOA估计 主瓣伴随干扰 和差波束 

分 类 号：TN974[电子电信—信号与信息处理]