基于时-空联合域编码的极化调制假目标鉴别方法  

A Polarization-Modulated False Target IdentificationMethod Based on Time-Space Joint Domain Coding

作　　者：时春鹏 何华锋 何耀民 刘瑜[2] 李震 张孝宇 SHI Chunpeng;HE Huafeng;HE Yaomin;LIU Yu;LI Zhen;ZHANG Xiaoyu(Rocket Force University of Engineering,Xi'an 710000,China;No.96732 Unit of PLA,Shaoyang 422000,China)

机构地区：[1]火箭军工程大学,西安710000 [2]中国人民解放军96732部队,湖南邵阳422000

出　　处：《电光与控制》2023年第11期7-12,126,共7页Electronics Optics & Control

基　　金：国家自然科学基金(61573366)。

摘　　要：针对数字射频存储器(DRFM)等转发式极化调制假目标干扰的鉴别问题,提出一种极化调制假目标鉴别方法。首先,提出极化圆阵的时-空联合域编码的极化测量模型,并证明了该模型经脉冲压缩后能够准确获得回波的极化信息;其次,根据极化雷达的张量积接收模型原理,得到了目标和极化调制假目标回波在四维复空间的分布差异;最后,基于该差异,结合最大最小距离算法和密度法思想,对K-means算法进行了改进,设计了以最佳聚类数K值大小为极化鉴别量的分类器。仿真实验以64个发射脉冲为例,验证了所提鉴别方法在不同信噪比(SNR)和干噪比(JNR)下均有良好的鉴别效果,可有效鉴别目标和极化调制假目标。To identify the interference of polarization-modulated false targets generated by the forwarding of Digital Radio Frequency Memory(DRFM),a method of identifying polarization-modulated false targets is proposed.Firstly,a polarization measurement model of the circularly polarized antenna array based on time-space joint domain coding is proposed,and it is proved that this model can accurately obtain the polarization information of echoes after pulse compression.Secondly,according to the principle of the tensor product signal reception model of the polarization radar,the distribution difference between the target echo and the polarization-modulated false target echo in the four-dimensional complex space is obtained.Finally,based on the difference and in combination with the maximum and minimum distance algorithm and the density method,the K-means algorithm is improved,and a classifier taking the optimal clustering number K as the polarization discriminant quantity is designed.The simulation experiment takes 64 transmitted pulses as examples,and verifies that the proposed method has good discriminating effect under different Signal-to-Noise Ratio(SNR)and Jamming-to-Noise Ratio(JNR),and can effectively discriminate between targets and polarization-modulated false targets.

关 键 词：有源欺骗干扰 极化鉴别 雷达编码 极化调制假目标 K-MEANS 最大最小距离 

分 类 号：TN973[电子电信—信号与信息处理]