多载波相位编码雷达间歇采样转发干扰分析  

Analysis of Intermittent-Sampling Repeater Jamming Against Multi-Carrier Phase Coded Radar

作　　者：李骥 王桦 王威 LI Ji;WANG Hua;WANG Wei(Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation, School of Computer and Communication Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China)

机构地区：[1]长沙理工大学计算机与通信工程学院综合交通运输大数据智能处理湖南省重点实验室,湖南长沙410114

出　　处：《信号处理》2019年第1期49-56,共8页Journal of Signal Processing

基　　金：装备预研共用技术基金(9140A01060314KG01018);装备探索研究项目(71314092);国家自然科学基金(61471370)

摘　　要：目前,基于正交频分复用(Orthorgonal Frequency Division Multiplexing,OFDM)的多载波相位编码雷达的转发欺骗干扰主要通过调制转发和直接复制转发来实现。传统干扰形式简单,干扰信号滞后时延长、规律性强、可预测性高。本文将间歇采样转发干扰思想引入到多载波相位编码体制雷达中,对经过伪噪声(Pseudo-Noise,PN)序列调制、P4码及混沌二相码(chaotic binary-phase code,CBPC)的OFDM雷达信号进行干扰效果分析;并在不同的干扰转发方式下,得到了各干扰参数与干扰效果间的映射关系,实现了对多载波相位编码雷达的幅度、数量、空间分布可控的逼真假目标干扰。结果表明:间歇采样直接转发干扰对信号编码方式的变化不敏感,但能形成单一假目标干扰;间歇采样重复转发干扰可形成逼真假目标串,且在采样占空比较小时,能对雷达系统形成近似压制式的干扰效果。At present, the forward deception jamming of Orthogonal Frequency-Division Multiplexing(OFDM )- based multi-carrier phase-coded radar is mainly realized by modulation and direct replication. The mode of traditional jamming is simple, the delay time of jamming signal is prolonged, the regularity is strong, and the predictability is high. In this paper, the idea of interrupted-sampling repeater jamming is introduced into multi-carrier phase-coded radar. The jamming effect of OFDM radar signal modulated by pseudo-noise(PN) sequence, P4 code and chaotic binary-phase code(CBPC) are analyzed. Then, In different forms of repeater jamming, the mapping relationship between jamming parameters and jamming effect is obtained. Lifelike false targets can be realized by controlling the amplitude, number and spatial distribution of the multi-carrier phase-coded radar. The studied result shows that interrupted-sampling repeater jamming is not sensetive to code method but can only form single false target;On the contrary,circular-repeater jamming can form the numerous lifelike false targets, and when the sampling duty is small, it can form an approximate suppressing jamming effect on radar system.

关 键 词：多载波相位编码雷达 间歇采样 编码方式 干扰形式 

分 类 号：TN972[电子电信—信号与信息处理]