复杂场景下间歇采样转发干扰抑制算法  

Interrupted sampling repeater jamming suppression algorithm incomplex scenarios

作　　者：安强 叶春茂[1] 鲁耀兵[1] 张彦 AN Qiang;YE Chunmao;LU Yaobing;ZHANG Yan(Beijing Institute of Radio Measurement,Beijing 100854,China)

机构地区：[1]北京无线电测量研究所,北京100854

出　　处：《系统工程与电子技术》2025年第2期463-477,共15页Systems Engineering and Electronics

摘　　要：间歇采样转发干扰(interrupted sampling repeater jamming, ISRJ)是一种对现代雷达系统构成重大威胁的相干干扰方式。在高干扰时域占空比、弱能量干扰等复杂场景下,ISRJ干扰切片相互遮掩且能量接近真实目标,这将导致传统时/频域算法干扰抑制效果大幅下降以至失效。针对该问题,从ISRJ时频耦合机理入手,提出一种新的针对复杂场景优化的ISRJ抑制算法,该算法遵循“解耦-滤波-重构”流程处理含干扰回波。首先,通过时频解耦变换,将干扰多组转发切片对齐,以有效降低干扰的时域占空比。然后,通过噪声区域的划分,采用低门限原则对时频图进行二值化处理。随后,采用最保守原则生成时域遮罩,滤除干扰。最后,通过间断CLEAN技术处理重构完整目标回波。多组仿真实验验证所提算法的有效性,分析多组参数变化对其性能的影响,并评估了算法的实时性。理论分析和仿真结果共同证实,相较于传统的基于滤波的抗ISRJ算法,所提算法可以在大干扰时域占空比、弱能量干扰等复杂场景下,展现出更为优越的干扰抑制性能。The interrepted sampling repeater jamming(ISRJ)is a form of coherent jamming that poses a significant threat to modern radar systems.In complex scenarios with high jamming time-domain duty cycles(JTDC)ratio or weak energy jamming,ISRJ slices can overlap with the energy close to the real targets,which leads to the traditional time-frequency domain algorithms less effective,even renders them ineffective.In response to this challenge,an ISRJ suppression algorithm optimized for complex scenarios is proposed,starting from the ISRJ time-frequency coupling mechanism.The proposed algorithm follows a“decoupling-filtering-reconstructing”process to handle jamming echoes.Firstly,it initially employs time-frequency decoupling transformation to align multiple repeater slices,effectively reducing the JDTC.Subsequently,it partitions noise regions and binarizes the time-frequency chart by a low threshold principle.Following that,it generates a time-domain mask based on the most conservative principles to eliminate jamming.Finally,it utilizes intermittent CLEAN technology to reconstruct the complete target echoes.Multiple sets of simulation experiments are conducted to validate the effectiveness of the proposed algorithm.It analyzes the impact of change of multiple sets of parameter on performance and assesses the algorithm’s real-time capabilities.Theoretical analysis and simulation results collectively confirm that compared to traditional filtering-based anti-ISRJ algorithms,the proposed algorithm exhibits superior jamming suppression performance in complex jamming scenarios,particularly those involving high JDTC ratio and weak energy jamming.

关 键 词：间歇采样转发干扰 CLEAN技术 时频分析 解调频处理 

分 类 号：TN974[电子电信—信号与信息处理]