基于主瓣多径干扰抑制的米波雷达测角方法  

Angles measurement of meter-wave radars by mainlobe multipath jamming suppression

作　　者：赵英俊[1,2] 李荣锋[2] 王永良[2] 刘维建[2] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430019 [2]空军预警学院兵器运用工程军队重点实验室,湖北武汉430019

出　　处：《华中科技大学学报（自然科学版）》2013年第4期51-55,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家杰出青年科学基金资助项目(60925005)

摘　　要：从抗主瓣多径干扰的角度出发,提出了一种基于主瓣多径干扰抑制的米波雷达测角方法.该方法通过对和、差波束施加相应约束来求取权值,即自适应和权在目标方向约束为单位增益,干扰方向约束为零增益;自适应差权在目标方向约束为零增益,干扰方向约束为零增益,同时在静态单脉冲比曲线的线性区域内选取2个对称的点作为约束点,以保持单脉冲比曲线不失真.然后进行和差波束形成得到目标单脉冲比,最后通过搜索扫描角度范围内的目标单脉冲比和静态单脉冲比差值中的最小值来确定目标角度.本方法能较好地保证米波雷达的测角精度,仿真实验和实测数据处理验证了此方法的有效性.From the viewpoint of the mainlobe multipath jamming suppression, an angle measurement technique was proposed. The weight of the new approach was obtained through certain constraints on the sum-difference beams. Precisely, the gain of the adaptive sum weight in the direction of the target was constrained to be one, while the gain of this weight in the direction of the jamming was confined to be zero. In contrast, the gain of the adaptive difference weight in the direction of the target was constrained to be zero, while the gain of this weight in the direction of the jamming was confined to be one. At the same time, two symmetry points in the linear interval of the curve of the quiescent mono- pulse ratio were selected as constrained points to keep the curve of the monopulse ratio unchanged. Then sum-difference beams were formed and the ratio of the monopulse ratio of the target was calcu- lated. Finally, the angle of the target was obtained through the determination of the smallest differ- ence between the monopulse ratio of the target and the quiescent monopulse ratio. The method pro- posed in this paper can preserve good precision of the measurement angle. The result is verified by computer simulation.

关 键 词：米波雷达 自适应波束形成 单脉冲测角 主瓣多径干扰 和波束 差波束 

分 类 号：TN957[电子电信—信号与信息处理]