基于相位特性的雷达假目标检测  

Repeating Distance Decoy Discrimination Based on Phase Characteristics

作　　者：杨帆 YANG Fan(No.91404 Troops of PLA,Qinhuangdao 066001)

机构地区：[1]解放军91404部队

出　　处：《舰船电子工程》2019年第1期50-53,82,共5页Ship Electronic Engineering

摘　　要：转发式假目标通过主瓣进入雷达接收机,逼真地模拟了真实目标在时域和频域的波形,对雷达搜索、识别、跟踪造成了严重的威胁。论文基于真实目标为多馈源辐射而转发式假目标视为单点辐射源的前提,对目标回波脉压后主瓣的相位特性进行了分析,并从回波频谱畸变的角度解释了其物理本质。在此基础上,通过分析扩展目标与转发式假目标回波脉压主瓣相位方差的差异,建立回波脉压主瓣相位的统计模型,利用Neyman-Pearson定理和广义似然比检测法进行正确的判别。最后,利用序贯检测的思想确定仿真数据的最优长度,蒙特卡洛仿真结果验证算法的有效性和可行性。Repeating decoy,through the main lob into the radar receiver,realistically simulates the real target in the waveform of both time and frequency domain,and causes serious threat to radar's search,identification and tracking.Based on the premise that the extended target is multi-feed radiation and the repeating decoy is single point source of radiation,analyzes the phase characteristics of the main lob after pulse compress and explaines its physical essence from the perspective of echo spectrum distor.tion in this paper.On the basis,by analyzing phase's variance difference between extended target and repeating decoy,the phase characteristics'statistics model are established.The Neyman-Pearson theorem and the GLRT are utilized to the correct discrimination.Finally,the optimal length of the simulation data is determined by the idea of sequential detection,and the performance of the discrimination algorithms are illustrated through the results of Monte Carlo simulations.

关 键 词：相位特性 LFM 转发式假目标 广义似然比检测 

分 类 号：TN953[电子电信—信号与信息处理]