线性调频脉冲雷达转发干扰研究  

Repeater Jamming Against LFM Pulse Radar

作　　者：黄翀鹏[1] 王剑[2] 徐保国[1] 

机构地区：[1]江南大学物联网工程学院,无锡214122 [2]清华大学电子系,北京100084

出　　处：《电子与信息学报》2013年第12期2874-2881,共8页Journal of Electronics & Information Technology

基　　金：国防科工委基础科研基金(A1420080177)资助课题

摘　　要：转发干扰是实现线性调频脉冲欺骗干扰的重要技术,中心频偏、脉宽和频率变化斜率是干扰信号的3个因子。当3个因子均存在偏差时,该文分别从时域和频域研究了转发干扰的欺骗效果。重点分析了与雷达检测干噪比密切相关的3个参数:脉宽损耗、峰值功率损耗和峰值时延。分析表明,基于群延迟的时域快速估计和基于频谱分析的频域严密推导,得到上述3个参数的数学表达式,它们高度相似。该文在此基础上进行了MATLAB仿真验证,证明这些数学表达式可适用于简化一般意义下的转发干扰分析。Repeater jamming is an important trend of deception jamming against Linear Frequency Modulation （LFM） radar, and repeater jamming waveform is determined by three factors：carrier frequency offset, pulse width and linear frequency modulation rate. When there are simultaneous deviations of these factors, the deception effect of repeater jamming is studied separately in time domain and frequency domain. Three important parameters about Jamming to Noise Ratio （JNR） are derived especially, which are pulse width losses, peak power losses and peak time delay. Theoretical analysis shows that the fast estimation by a group delay in time domain for the formulas of these parameters is in accordance with the detailed deduction by spectrum analysis in frequency domain, and the corresponding MATLAB simulations are provided. So the analysis of the general jamming can be simplified by these formulas.

关 键 词：雷达信号处理 线性调频(LFM) 转发干扰 干噪比 

分 类 号：TN974[电子电信—信号与信息处理]