基于频控阵雷达的一种最差环境下干扰抑制  

Interference suppression in the worst environment based on frequency array radar

作　　者：陶馨珂 廖艳苹[1] TAO Xinke;LIAO Yanping(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2024年第5期228-234,共7页Applied Science and Technology

摘　　要：为了解决频控阵雷达的距离与角度耦合特性,形成能量聚集的点状波束,并且提高频控阵雷达的抗干扰能力,需要考虑到自适应波束形成技术。为此,在频控阵雷达接收模型基础上,推导最小方差无失真响应(minimum variance distortionless response,MVDR)波束形成算法,形成点波束能量聚集效果,在干扰抑制的基础上,针对旁瓣较高的问题,提出一种最差性能优化算法(worst-case performance optimization,WCP)的凸优化改进方法,形成点波束的同时降低旁瓣能量并且进行干扰抑制。区别于传统频偏优化的点波束形成方法与MVDR算法,通过在角度维度与距离维度上的独立分析发现,改进的方法可以在角度维与距离维降低旁瓣能量,干扰抑制效果更好。将该算法分别在均匀线阵和圆形频控阵中应用,圆形阵列增加了一个俯仰角维度,更适用于工程实际应用。The system model of target angle and distance correlation was constructed by transmitting signals in each array with small frequency offset.In order to solve the range and angle coupling characteristics of frequency-controlled array radar,form energy-gathered spot beam,and improve the anti-jamming ability of frequency-controlled array radar,it is necessary to consider the adaptive beamforming technology.Based on the receiving model of frequency-controlled array radar,the minimum variance distortion-free response(MVDR)beamforming algorithm was deduced to form the effect of spot beam energy aggregation.Aiming at the problem of high sidelobes,a convex optimization method for the worst-case performance optimization(WCP)was applied on the basis of interference suppression,forming spot beam,reducing sidelobe energy and suppressing interference.Different from the traditional point beamforming method and MVDR algorithm with frequency bias optimization,the improved method could reduce the sidelobe energy in angle dimension and distance dimension through independent analysis,obtaining better interference suppression effect.The algorithm was applied to uniform linear array and circular frequency array respectively.The circular array was added with a pitch angle dimension,which was more suitable for practical engineering applications.

关 键 词：频控阵 点波束形成 最小方差无失真响应算法 凸优化 干扰抑制 圆形阵列 最差性能优化算法 自适应波束 

分 类 号：TN97[电子电信—信号与信息处理]