基于可行点追踪的机载MIMO雷达收发联合设计方法  

Joint design method of transmit-receive for airborne MIMO radar based on feasible point pursuit

作　　者：李志汇 周青松 牛朝阳 刘春生 冯晓星 张剑云 LI Zhihui;ZHOU Qingsong;NIU Chaoyang LIU Chunsheng;FENG Xiaoxing;ZHANG Jianyun(College of Electronic Engineering,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037

出　　处：《信息对抗技术》2022年第2期85-94,共10页Information Countermeasures Technology

基　　金：国家自然科学基金资助项目(62001510,62071476);安徽省自然科学基金青年资助项目(2108085QF257);国防科技大学科研计划资助课题(ZK19-10,ZK20-22,ZK20-33)。

摘　　要：针对目标先验信息不准确条件下机载多输入多输出(multiple-input multiple-out-put,MIMO)雷达运动目标检测性能下降的问题,提出了一种基于可行点追踪连续凸近似(feasible point pursuit successive convex approximation,FPP-SCA)的机载MIMO雷达发射波形和接收滤波器组联合设计方法。在角度-多普勒平面上目标可能出现的区域设计一组接收滤波器,以最大化最差情形输出信杂噪比作为联合设计的优化准则;考虑波形的恒模和相似性约束建立极大化极小的联合设计问题,以提高目标参数不准确条件下对目标的稳健性检测;基于FPP-SCA算法框架,将联合设计问题的非凸约束条件进行凸近似处理,解决了极大化极小联合设计问题。仿真实验验证了所提方法能在目标参数不准确时保持较优的目标检测性能,且运算量低于对比方法。In view of the moving target detection performance degradation of airborne multi-ple input multiple output(MIMO)radar in the presence of inaccurate target prior informa-tion,this paper proposed a joint design method which combines the transmit waveform and receive filter bank of airborne MIMO radar based on feasible point pursuit successive convex approximation(FPP SCA).Firstly,a set of receive filter banks was designed in the area where the target might appear on the angle-Doppler plane,and the worst-case output signal-to-clutter plus noise ratio(SCNR)was maximized as the optimization criterion.Secondly,considering the constant modulus constraint and similarity constraint on the waveform,the maximin joint design problem was formulated to improve the detection robustness of target detection under the uncertainty of target parameters.Finally,based on FPP-SCA algorithm framework,the non-convex constraints of the joint design problem were approximately trans-formed into the convex constraints to solve the maximin joint design problem.Simulation re-sults showed that the proposed method could maintain better performance when the target pa-rameters were inaccurate,and the computational load of the proposed method was also lower than that of the comparison method.

关 键 词：机载MIMO雷达 接收滤波器组 迭代可行点追踪连续凸近似 

分 类 号：TN957[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]