中国空间科学技术

中国空间科学技术 ›› 2025, Vol. 45 ›› Issue (6): 160-169.doi: 10.16708/j.cnki.1000-758X.2025.0100

• 论文 • 上一篇    

一种基于幅值预处理的间歇采样转发干扰抑制方法

魏振，王林茜*，孙垂强   

  1. 空间电子信息技术研究院,西安710000
  • 收稿日期:2024-11-20 修回日期:2025-04-20 录用日期:2025-04-28 发布日期:2025-11-17 出版日期:2025-12-01

An algorithm for suppressing intermittent sampling and forwarding jamming based on amplitude preprocessing

WEI Zhen，WANG Linxi*，SUN Chuiqiang   

  1. China Academy of Space Technology (Xi’an)，Xi’an 710000，China
  • Received:2024-11-20 Revision received:2025-04-20 Accepted:2025-04-28 Online:2025-11-17 Published:2025-12-01

PDF (PC)

0

摘要： 随着雷达电子战愈发激烈，实际电磁战场变化复杂。在更为恶劣的回波信号环境下，对间歇采样转发干扰的抑制水平亟需进一步改进。提出了一种基于幅值预处理的间歇采样转发干扰抑制方法。在滤波分析之前，首先对含干扰回波信号的幅度进行包络检测，通过分析包络差分值的变化特征，精准提取出无干扰片段，然后根据无干扰片段的幅度特征对含干扰回波信号进行幅值压缩，最后对预处理之后的回波信号进行基于能量分析的频域滤波。同时，设置了多组仿真实验，验证了所提算法在不同信噪比和干信比场景下的间歇采样转发干扰抑制性能。理论分析及仿真结果表明，所提算法可以显著提高雷达系统对间歇采样转发干扰的抑制能力。在低信噪比(5dB)和低干信比(5dB)场景下，可以使脉冲压缩结果中的信干比改善因子提高到 30dB 以上，在较高信噪比(10dB和20dB)和较高干信比(10dB和20dB)场景中，脉冲压缩结果中的信干比改善因子可以提高到55dB 以上，干扰抑制性能明显优于两种经典算法。所提算法具有良好的工程实用性，对后续进一步挖掘此类脉内转发的新型欺骗干扰抑制技术提供一定的思路，也对对抗样机的工程研制以及对抗战术的实施具有一定的参考意义。关键词关键词：

关键词: 间歇采样转发干扰, 干扰抑制, 包络分析, 能量检测, 线性调频

Abstract:

With the increasing intensity of radar electronic warfare and the growing complexity of practical electromagnetic battlefields, there is an urgent need to enhance the suppression capability against intermittently sampled repeater jamming (ISRJ) under more challenging echo signal environments. This study proposes an amplitude preprocessing-based ISRJ suppression method. Prior to filtering analysis, envelope detection is first performed on the amplitude of jamming-contaminated echo signals. Through analyzing the variation characteristics of envelope differential values, jamming-free segments are accurately extracted. Subsequently, amplitude compression is implemented on the contaminated signals based on the amplitude characteristics of these clean segments. Finally, energy analysis-based frequency-domain filtering is applied to the preprocessed echo signals. Multiple simulation experiments are conducted to validate the algorithm's ISRJ suppression performance under various signal-to-noise ratio (SNR) and interference-to-signal ratio (ISR) scenarios. Theoretical analysis and simulation results demonstrate that the proposed algorithm significantly enhances radar systems'ISRJ suppression capability. Under low SNR (5dB) and low JSR (5dB) conditions, the signal-to-interference ratio improvement factor in pulse compression results exceeds 30dB. In high SNR (10dB and 20dB) and high ISR (10dB and 20dB) scenarios, this improvement factor surpasses 55dB, showing markedly superior performance compared with two classical algorithms. The proposed algorithm demonstrates strong engineering practicality and provides valuable insights for developing novel intra-pulse deception jamming suppression techniques. It offers significant reference value for both the engineering development of countermeasure prototypes and the implementation of electronic counter-countermeasure tactics.

Key words: interrupted sampling repeater jamming, jamming suppression, envelope analysis, energy detection, linear frequency modulation