对机载雷达STAP的调频转发干扰研究  

Research on Frequency Modulation Repeater Jamming for STAP Airborne Radar

作　　者：陈弘凯 汤建龙[1] 薛成均 解佳龙 CHEN Hongkai;TANG Jianlong;XUE Chengjun;XIE Jialong(School of Electronic Engineering,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《雷达科学与技术》2023年第3期282-289,297,共9页Radar Science and Technology

基　　金：国家自然科学基金(No.61901332)。

摘　　要：针对空时自适应处理(STAP)过程中,训练样本内包含干扰目标时,自适应处理器会在该干扰目标所在方位-多普勒频率处产生零点这一特性,提出一种调频转发干扰方法。该方法通过对干扰机接收信号加以频率调制,在目标周围生成多个距离分布可控的假目标,破坏训练样本独立同分布条件,导致从训练样本中估计得到的样本协方差矩阵与真实的协方差矩阵偏差加大,从而影响自适应处理器检测目标结果。仿真结果表明,该方法产生的假目标既可有效降低空时自适应处理系统的目标检测性能,也可构成对空时自适应系统的欺骗干扰。A frequency modulation repeater jamming method is proposed to address the property that the adaptive processor generates zero points at the azimuth⁃Doppler frequency of the jamming target when the training sample con⁃tains a jamming target in the space⁃time adaptive processing(STAP)process.The method generates multiple false tar⁃gets with controllable distance distribution around the target by frequency modulating the signal received by the jammer,destroys the independent and identical distribution condition of the training samples and leads to an increase in the devi⁃ation between the covariance matrix estimated from the training samples and the real covariance matrix thus affecting the target detection result of the adaptive processor.The simulation results show that the false targets generated by this method can not only effectively reduce the target detection performance of the space⁃time adaptive processing system,but also constitute deception jamming to the space⁃time adaptive processing system.

关 键 词：空时自适应处理 频率调制 独立同分布 非均匀干扰 

分 类 号：TN972[电子电信—信号与信息处理]