MIMO雷达的低旁瓣发射波束图优化设计方法  

Low Sidelobe Beampattern Optimization Design Method for MIMO Radar

作　　者：刘鸽 田晓[1] 顾鹏程 陈港 黄小艳 LIU Ge;TIAN Xiao;GU Pengcheng;CHEN Gang;HUANG Xiaoyan(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电子信息对抗技术》2024年第5期12-17,共6页Electronic Information Warfare Technology

摘　　要：针对经典发射波束图匹配设计方法存在的旁瓣能量高、被截获距离远等缺点,借助最大化目标与旁瓣峰值的功率差、最小峰值旁瓣电平及最小积分旁瓣电平等准则,提出了低旁瓣发射波束图优化设计方法。该方法通过设计合适的协方差矩阵,进而合成符合预期的发射波束图,使多输入多输出(Multiple Input Multiple Output,MIMO)雷达在旁瓣区域上辐射的能量尽可能小,提升了雷达的抗截获性能。仿真实验证明,当设置相同的匹配误差时,该方法在多目标场景下得到的波束图旁瓣最低可达到-29.46 dB,较经典方法的旁瓣低16.88 dB。Aiming at the shortcomings of the classical transmitting beampattern matching design method,such as high sidelobe energy and long intercept distance,a low sidelobe transmitting beampattern optimization design method is proposed by means of maximizing the power difference between target and sidelobe peak,minimum peak sidelobe level and minimum integrated sidelobe level criteria.By designing a suitable covariance matrix and synthesizing a transmission beam pattern that meets expectations,the energy radiated by multiple input multiple output(MIMO)radar in the sidelobe area is minimized,improving the radar s anti-interception performance.The simulation results show that when the same matching error is set,the minimum sidelobe of the beampattern obtained by the proposed method in the multi-target scene can reach-29.46 dB,which is 16.8 dB lower than that of the classical method.

关 键 词：MIMO雷达 抗截获 发射波束图设计 超低旁瓣 

分 类 号：TN957.51[电子电信—信号与信息处理]