基于脉间码型捷变波形的距离-多普勒二维干扰重构算法  

Range-Doppler Two-dimensional Jamming Reconstruction Algorithm Based on Interpulse Code Agile Waveform

作　　者：高宇航 张凯翔 范花玉 刘泉华[1,4] 刘子豪 王朝旭 GAO Yuhang;ZHANG Kaixiang;FAN Huayu;LIU Quanhua;LIU Zihao;WANG Chaoxu(Radar Research Lab,School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Electronic and Information Technology in Satellite Navigation(Beijing Institute of Technology),Ministry of Education,Beijing 100081,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314000,China;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401120,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]卫星导航电子信息技术教育部重点实验室(北京理工大学),北京100081 [3]北京理工大学长三角研究院(嘉兴),嘉兴314000 [4]北京理工大学重庆创新中心,重庆401120

出　　处：《雷达学报（中英文）》2024年第1期187-199,共13页Journal of Radars

基　　金：国家自然科学基金(62001024);高等学校学科创新引智计划(B14010);重庆市自然科学基金(cstc2020jcyj-msxmX0260)。

摘　　要：密集假目标干扰通过在真实目标周围产生大量假目标,形成欺骗和压制双重干扰效果,严重影响雷达的目标探测能力。为此,该文提出一种基于脉间码型捷变波形的距离-多普勒二维干扰重构算法来抑制密集假目标干扰。该算法基于脉间码型捷变波形的距离选通性,在距离-多普勒域通过交替反演实现干扰和目标重构,并从回波中对消干扰来实现干扰剔除。首先,通过构造不同距离段的接收滤波器组来实现干扰和目标回波的分距离段处理;其次,采用联合失配滤波器组使各脉冲滤波输出的距离旁瓣结构近似相同,减小脉间码型捷变波形经脉冲多普勒处理后沿多普勒维的散布能量;然后,利用干扰和目标回波在不同距离-多普勒平面上的能量分布特性构造滤波矩阵;最后,通过交替反演实现干扰和目标的精准重构,进而实现密集假目标干扰的抑制。仿真结果表明,与传统方法相比,该文所提算法在干扰抑制和运行时间方面展现出优越的性能,显著提升了雷达在强干扰环境中的目标检测能力。Dense false target jamming generates a large number of false targets around the real target,leading to dual jamming effects of deception and suppression.This severely affects the target detection ability of the radar.Therefore,this study proposes a range-Doppler two-dimensional jamming reconstruction algorithm based on the interpulse code agile waveform to suppress dense false target jamming.Based on the range-gating characteristics of the interpulse code agile waveform,the jamming and target echo reconstruction in the range-Doppler domain is realized by alternate inversion.Reconstruction jamming is eliminated by the iterative cancellation method.First,the jamming and target echo are processed by constructing receiving filter banks with different range intervals.Second,a joint mismatched filter bank is used to make the range sidelobe structure of each pulse filter output approximately the same.This reduces the divergence energy along the Doppler dimension after the pulse Doppler processing of the interpulse code agile waveform.The filter matrix is then constructed using the energy distribution characteristics of the jamming and target echo in different range-Doppler regions.Finally,accurate jamming and target echo reconstruction are achieved by alternate inversion to suppress dense false target jamming.Simulation results demonstrate the superior performance of the proposed algorithm in terms of jamming suppression and running time compared with traditional algorithms.These procedures significantly improve the target detection capability of the radar in strong jamming scenarios.

关 键 词：脉间码型捷变波形 密集假目标干扰 干扰重构 距离选通性 交替反演 

分 类 号：TN958.2[电子电信—信号与信息处理]