LFM雷达的非均匀间歇采样重复转发干扰研究  

Research on Non-Uniform Interrupted Sampling Periodic Repeater Jamming for LFM Radar

作　　者：罗志豪 李建兵[1] 董雪雨 范浩鹏 孙建邦 LUO Zhihao;LI Jianbing;DONG Xueyu;FAN Haopeng;SUN Jianbang(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2022年第4期402-407,共6页Journal of Information Engineering University

摘　　要：针对线性调频(Linear Frequency Modulation,LFM)信号,通过对采样方式的分析,讨论均匀间歇采样重复转发干扰(Uniform Interrupted Sampling Periodic Repeater Jamming,UISPRJ)与非均匀间歇采样重复转发干扰(Non-uniform Interrupted Sampling Periodic Repeater Jamming,NUISPRJ)生成的干扰输出信号特征。基于此提出一种基于伪随机序列的NUISPRJ样式,通过伪随机序列生成非均匀采样脉冲串,采样后多次转发产生干扰信号。通过仿真,对比两种不同采样方式的干扰效果。仿真表明:UISPRJ可以生成多个假目标串,但假目标间隔一致,过于规律化。NUISPRJ生成的假目标数目显著增加,同时分布更具随机性,兼具压制干扰和欺骗干扰的双重效果。在实际作战时可以通过控制采样脉宽以及转发次数控制假目标群数目和覆盖区域,更加有效地实施干扰。The characteristics of interference signal generated by uniform interrupted sampling periodic repeater jamming( UISPRJ) and non-uniform interrupted sampling periodic repeater jamming( NUISPRJ) are discussed by analyzing the sampling methods for linear frequency modulation( LFM)signals.A NUISPRJ based on pseudo random sequence is proposed,which generates non-uniform sampling pulse train through pseudo random sequence,and then generates interference signal by repeated forwarding after sampling.The jamming effects of two different sampling methods are compared by simulation.The simulation results show that multiple false targets can be generated by UISPRJ,but the distribution of false targets is too regular.The number of false targets generated by NUISPRJ increases significantly,and the distribution is more random,which has the dual effects of crowd suppression and deceptive jamming at the same time.The number and coverage area of false targets group can be controlled by controlling sampling pulse width and forwarding times to implement jamming more effectively in actual combat.

关 键 词：线性调频 非均匀 间歇采样 假目标 重复转发干扰 

分 类 号：TN918.1[电子电信—通信与信息系统]