多径环境下的密集假目标干扰抑制技术研究  

Dense False Target Jamming Suppression in Multipath Environment

作　　者：王长杰 张凯翔 蔡博文 梁振楠 刘泉华[1,3] WANG Changjie;ZHANG Kaixiang;CAI Bowen;LIANG Zhennan;LIU Quanhua(Radar Research Lab,School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China;Ministry of Education Key Laboratory of Electronic and Information Technology in Satellite Navigation,Beijing Institute of Technology,Beijing 100081,China;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401135,China)

机构地区：[1]北京理工大学信息与电子学院雷达技术研究所,北京100081 [2]北京理工大学卫星导航电子信息技术教育部重点实验室,北京100081 [3]北京理工大学重庆创新中心,重庆401135

出　　处：《北京理工大学学报》2023年第4期360-366,共7页Transactions of Beijing Institute of Technology

基　　金：重庆市自然科学基金资助项目(2020ZX3100039);高等学校学科创新引智基地(B14010)。

摘　　要：密集假目标干扰兼具欺骗和压制的干扰效果,是对抗现代相参雷达的典型干扰.对于地面雷达,当干扰机位于低仰角复杂环境时,其接收到的干扰信号可能存在多径效应,导致传统的副瓣对消(SLC)算法性能明显恶化.针对该问题,提出一种基于多径筛选的并行SLC算法.算法在假目标检测的基础上,通过K-Means无监督聚类对各假目标峰值的通道间相位矢量进行聚类分析;根据聚类结果筛选各路径的干扰样本进行并行SLC处理;针对各路对消结果进行同距离选小,从而实现多径环境下的密集假目标干扰抑制.利用某型雷达采集的实测数据验证了算法的有效性.Dense false target jamming is a typical jamming against modern coherent radar,possessing both deception and suppression jamming effects.For ground-based radars,when countering the jammer with a low elevation angle in a complex environment,the received signals may suffer from multipath effects,resulting in a significant deterioration of the performance of the traditional side lobe cancellation(SLC)algorithm.Aiming at this problem,a parallel SLC algorithm was proposed based on multipath samples clustering.Based on false target detection,the algorithm was arranged firstly to perform unsupervised clustering with K-means algorithm for the multi-channel-phase vector of each peak.Secondly,the jamming samples of each path were picked for SLC processing.Finally,the minimum value of the same range bin of all the paths was selected,so as to realize the dense false target jamming suppression in the multipath environment.The effectiveness of the algorithm was verified according to the filed data gathered from a kind of radar.

关 键 词：密集假目标 多径效应 无监督聚类 干扰抑制 

分 类 号：TN957.51[电子电信—信号与信息处理]