西安电子科技大学学报 ›› 2021, Vol. 48 ›› Issue (2): 139-146.doi: 10.19665/j.issn1001-2400.2021.02.018

• 雷达技术进展专题 • 上一篇    下一篇

时频分析联合带通滤波抑制间歇采样转发干扰

孙正阳(),董玫(),陈伯孝()   

  1. 西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安 710071
  • 收稿日期:2020-07-08 修回日期:2020-12-30 出版日期:2021-04-20 发布日期:2021-04-28
  • 通讯作者: 董玫
  • 作者简介:孙正阳(1995—),男,西安电子科技大学硕士研究生,E-mail: zysun_18@stu.xidian.edu.cn|陈伯孝(1966—),男,教授,E-mail: bxchen@xidian.edu.cn
  • 基金资助:
    国家自然科学基金(61971323);国防科技基础加强计划(2019-JCJQ-ZD-067-00);中央高校基本科研业务费专项资金(JB190210)

Interrupted sampling repeater jamming suppression based on time-frequency analysis and band-pass filtering

SUN Zhengyang(),DONG Mei(),CHEN Baixiao()   

  1. National Key Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China
  • Received:2020-07-08 Revised:2020-12-30 Online:2021-04-20 Published:2021-04-28
  • Contact: Mei DONG

摘要:

间歇采样转发干扰是一种新型相干干扰,能够生成单个或多个假目标群,常规信号处理方法难以对其有效抑制。针对上述问题,首先在时频域对数个脉冲重复周期的接收信号进行积累,实现信号时频信息的增强;然后,结合图像处理算法在时频面上准确提取干扰分布区域,并通过时频域滤波粗略重构目标回波信号;最后,依据重构的时域信号构造带通滤波器,实现对干扰和噪声的抑制。仿真结果表明,该方法可以在低信噪比、多目标环境下有效地抑制多种类型的间歇采样转发干扰。相比于其他方法,该方法具有更强的稳健性,且在抑制假目标的同时不会造成明显的真实目标幅度损失。

关键词: 间歇采样转发干扰, 时频分析, 图像处理, 带通滤波, 干扰抑制

Abstract:

Interrupted sampling repeater jamming is a new type of coherent jamming that generates a single or multiple false target groups,which cannot be effectively suppressed using conventional signal processing methods.To solve this problem,the received signals of several pulse repetition cycles are first accumulated in the time-frequency domain to enhance the time-frequency information on the signals.Then,the distribution of jamming signal is extracted accurately on the time-frequency surface based on the image processing algorithm,and the target echo is roughly reconstructed according to the time-frequency domain filtering method.Finally,based on the reconstructed time-domain signal,a band-pass filter is constructed to suppress the interference and noise.Simulation results indicate that compared with other methods,this scheme can effectively suppress various types of interrupted sampling repeater jamming in a low signal-to-noise ratio and multi-target environment with robustness and accuracy.

Key words: interrupted sampling repeater jamming, time-frequency analysis, image processing, band-pass filtering, interference suppression

中图分类号: 

  • TN974
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