系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (8): 2540-2548.doi: 10.12305/j.issn.1001-506X.2025.08.12

• 传感器与信号处理 • 上一篇    

波形编码抗主瓣干扰方法带宽限制分析及优化

薄钧天(), 王万田(), 李亚星(), 张雲硕(), 王衡峰(), 张嘉毫(), 孟进()   

  1. 海军工程大学电磁能技术全国重点实验室,湖北 武汉 430033
  • 收稿日期:2024-04-03 出版日期:2025-08-25 发布日期:2025-09-04
  • 通讯作者: 张嘉毫 E-mail:752284662@qq.com;18827086783@163.com;whhit173@hotmail.com;gudaowork@163.com;henvin999@163.com;jiahao.z@hotmail.com;mengjingemc@163.com
  • 作者简介:薄钧天(1996—),男,博士研究生,主要研究方向为雷达抗干扰、雷达信号处理
    王万田(1992—),男,讲师,博士,主要研究方向为雷达技术、干扰抑制
    李亚星(1988—),男,助理研究员,博士,主要研究方向为干扰防护
    张雲硕(1994—),男,博士研究生,主要研究方向为非合作干扰对消算法建模与性能分析
    王衡峰(1992—),男,助理研究员,博士,主要研究方向为干扰抑制、天线设计
    孟 进(1977—),男,教授,博士,主要研究方向为电磁兼容、电磁攻防
  • 基金资助:
    国家杰出青年科学基金(52025072)资助课题

Analysis and optimization of bandwidth limitation for anti-mainlobe jamming method based on waveform coding

Juntian BO(), Wantian WANG(), Yaxing LI(), Yunshuo ZHANG(), Hengfeng WANG(), Jiahao ZHANG(), Jin MENG()   

  1. National Key Laboratory of Electromagnetic Energy,Naval University of Engineering,Wuhan 430033,China
  • Received:2024-04-03 Online:2025-08-25 Published:2025-09-04
  • Contact: Jiahao ZHANG E-mail:752284662@qq.com;18827086783@163.com;whhit173@hotmail.com;gudaowork@163.com;henvin999@163.com;jiahao.z@hotmail.com;mengjingemc@163.com

摘要:

针对主瓣干扰(main-lobe jamming,MLJ)在空域与有用信号(signal of interest,SOI)高度相关而难以被有效抑制的问题,基于跳变编码波形的抗MLJ系统通过对波形进行编码调制,接收端据此重构接收信号,利用码-空映射等效改变SOI空域信道,实现SOI与干扰信号在空域的分辨。但理论分析发现,信号带宽的增大将掩盖编码特征并使该方法失效。为此,利用多抽头系统的时-频映射特质,通过多抽头结构设计降低带宽掩盖,重新凸显编码特征。仿真结果显示,所提方法可在10 MHz的全带宽内,使干扰对消比大于20 dB,SOI对消比小于3 dB,具有较好的抗主瓣非零带宽干扰性能。

关键词: 抗主瓣干扰, 带宽限制, 雷达, 波形设计, 多抽头

Abstract:

To address the problem that the main-lobe jamming (MLJ) is highly correlated with the signal of interest (SOI) in spatial domain, making it difficult to suppress the jamming, an anti-MLJ system based on hopping coding waveform performs the coding modulation for waveform, then the receiver reconstructs the received signal. Through code-spatial mapping, the spatial channel of the SOI is equivalently changed, achieving the spatial domain resolution of SOI and jamming signal. However, theoretical analysis reveals that the increase in signal bandwidth obscure the coding characteristics and render the method ineffective. To this end, the time-frequency mapping characteristics of the multi-tap system are utilized. By designing the multi-tap structure, the bandwidth coverage is reduced, and the coding characteristics are highlighted again. Simulation results show that the proposed method achieves a jamming cancellation ratio greater than 25 dB over the full bandwidth of 10 MHz, with an SOI cancellation ratio of less than 3 dB, demonstrating great anti main-lobe non-zero bandwidth jamming performance.

Key words: anti-main-lobe jamming (MLJ), limitation of bandwidth, radar, waveform design, multi-tap

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