基于时频重叠度的脉内捷变波形设计与干扰对抗算法  

Design of Intra⁃Pulse Frequency Agile Waveform and Interference Countermeasures Based on Time⁃Frequency Overlap Degree

作　　者：段丽宁 吴耀君 彭本旺 王国政 邓明龙 全英汇 DUAN Lining;WU Yaojun;PENG Benwang;WANG Guozheng;DENG Minglong;QUAN Yinghui(School of Electronic Engineering,Xidian University,Xi’an 710071,China;National Key Laboratory of Electromagnetic Space Security,Chengdu 610036,China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]电磁空间安全全国重点实验室,四川成都610036

出　　处：《雷达科学与技术》2025年第2期125-135,共11页Radar Science and Technology

基　　金：国家自然科学基金(No.62331019)。

摘　　要：间歇采样转发干扰凭借其脉内快速采样转发的优势,形成的干扰信号与目标强相关,因此可获得脉冲压缩处理增益并形成假目标群,对雷达目标探测带来严峻考验。本文以提升雷达主动对抗能力为目标,提出了一种基于时频重叠度的脉内捷变波形设计与干扰对抗算法。首先,构建关于干扰与目标时频重叠度的目标函数,通过优化子脉冲个数以及脉内编码序列,增加干扰与目标的时频正交性。基于优化后的脉内捷变波形,通过边缘检测算法识别干扰区域并构造时频滤波器,实现时频域的干扰识别与抑制。实验结果表明,所提算法在单个及多个间歇采样转发干扰场景下均表现出良好的干扰对抗性能,有效提升了雷达的干扰对抗能力。Interrupted sampling repeater jamming,with its advantage of rapid intra-pulse sampling and forwarding,forms jamming signals that are strongly correlated with the target.Consequently,it can obtain pulse compression processing gain and form false target groups,posing a severe test to radar target detection.Aiming to improve the active countermeasure capability of radar,an intra-pulse frequency agile waveform design and jamming countermeasure algorithm based on minimizing the time-frequency overlap area is proposed.Firstly,the objective function regarding the timefrequency overlap area between the jamming and the target is constructed.By optimizing the number of sub-pulses and the intra-pulse coding sequence,the time-frequency orthogonality between the jamming and the target is increased.Based on the optimized intra-pulse frequency agile waveform,the interference area is identified by an edge detection algorithm and a time-frequency filter is constructed to realize interference identification and suppression in the time-frequency domain.Experimental results show that the proposed algorithm exhibits good jamming countermeasure performance in single and multiple intermittent sampling repeater jamming scenarios,effectively improving the jamming countermeasure capability of radar.

关 键 词：间歇采样转发干扰 脉内捷变波形 时频重叠 干扰抑制 

分 类 号：TN974[电子电信—信号与信息处理]