捷变波形结合限幅法对抗距离假目标干扰研究  

Research on the anti-jamming of range false target by agile waveform combined with amplitude limiting method

作　　者：李韧 LI Ren(Shenzhen Urban Transport Planning Center Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳市城市交通规划设计研究中心股份有限公司,广东深圳518000

出　　处：《应用科技》2022年第4期51-55,共5页Applied Science and Technology

基　　金：国家重点研发计划项目(2019YFB2102704);深圳市工业和信息化局产业发展专项资金“创新链+产业链”融合专项扶持计划项目(20190830020003).

摘　　要：基于数字射频存储(DRFM)技术的有源欺骗干扰不断发展,而目前仍然未解决使用线性调频(LFM)脉冲雷达有效削弱此种欺骗干扰的影响。为此,本文提出一种捷变波形结合限幅法对抗距离假目标干扰。首先,捷变雷达发射一种随机脉冲初始相位(RPIP)波形,利用相邻2个周期内脉压信号的尖峰片段相位差,可估计出干扰信号滞后雷达发射信号的周期个数,为抗干扰方法提供必要的先验知识;然后,对不同周期内RPIP信号的调频率进行抖动处理,形成一种具有正交性的斜变−随机脉冲初始相位(SV-RPIP)波形,结合限幅法对抗距离假目标干扰。仿真结果显示,所提方法可以做到抑制干扰后的信干比,比抑制前改善了20 dB以上,说明本文方法可以有效地抑制较大功率的距离假目标干扰。With continuous development of active deception jamming based on digital radio frequency memory(DRFM)technology,how to effectively weaken the influence of this deception jamming for linear frequency modulation(LFM)pulse radar is still unsolved.In this paper,a method of agile waveform combined with amplitude limiting is proposed to counter range false target jamming.Firstly,the agile radar transmits a random pulse initial phase(RPIP)waveform.By using the phase difference of the peak segments of the pulse compression signals in two adjacent periods,the number of periods of the jamming signal lagging behind the radar transmitting signal can be estimated,which provides necessary a priori knowledge for the anti-jamming method.Then,the chirp rate of RPIP signals in different periods is jittered to form a kind of orthogonal slope varying random pulse initial phase(SV-RPIP)waveform,which is combined with amplitude limiting method to counter range false target jamming.Finally,the simulation results show that the signal to jamming ratio after jamming suppression can be improved by more than 20dB compared with that before jamming suppression,which shows that this method can effectively suppress high-power range false target jamming.

关 键 词：雷达抗干扰 抗欺骗干扰 距离假目标干扰 强干扰 捷变雷达 捷变波形 限幅法 信号处理 

分 类 号：TN974[电子电信—信号与信息处理]