基于捷变频联合数学形态学的干扰抑制算法

doi:10.3969/j.issn.1001-506X.2020.07.09

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (7): 1491-1498.doi: 10.3969/j.issn.1001-506X.2020.07.09

基于捷变频联合数学形态学的干扰抑制算法

董淑仙(), 全英汇(), 陈侠达(), 高霞(), 李亚超(), 邢孟道()

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:2019-09-05 出版日期:2020-06-30 发布日期:2020-06-30
作者简介:董淑仙(1995-),女,博士研究生,主要研究方向为雷达信号处理。E-mail:1591150698@qq.com|全英汇(1981-),男,教授,博士研究生导师,博士,主要研究方向为雷达实时信号处理。E-mail:quanyinghui@126.com|陈侠达(1995-),男,硕士研究生,主要研究方向为雷达信号处理。E-mail:471529434@qq.com|高霞(1996-),女,硕士研究生,主要研究方向为雷达信号处理。E-mail:2636897970@qq.com|李亚超(1980-),男,教授,博士研究生导师,博士,主要研究方向为雷达成像和实时信号处理。E-mail:ycli@mail.xidian.edu.cn|邢孟道(1974-),男,教授,博士研究生导师,博士,主要研究方向为SAR/ISAR成像和动目标检测。E-mail:mdxing@mail.xidian.edu.cn
基金资助:
国家自然科学基金(61772397);国家自然科学基金(61303035);国家自然科学基金(61471283)

Interference suppression algorithm based on frequency agility combined with mathematical morphology

Shuxian DONG(), Yinghui QUAN(), Xiada CHEN(), Xia GAO(), Yachao LI(), Mengdao XING()

National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China

Received:2019-09-05 Online:2020-06-30 Published:2020-06-30
Supported by:
国家自然科学基金(61772397);国家自然科学基金(61303035);国家自然科学基金(61471283)

摘要/Abstract

摘要：

数字射频存储器(digital radio frequency memory, DRFM)通过截获雷达发射信号并对其进行调制和转发,在距离维上形成欺骗式干扰,严重影响了雷达对目标的检测与跟踪。针对这一问题,提出一种捷变频联合数学形态学的密集假目标干扰抑制算法。首先,采用最大类间方差法(Otsu)对脉冲压缩后的数据进行二值化处理。然后,通过数学形态学中的开运算抑制干扰和噪声。最后,通过二维稀疏重构获得距离-速度二维高分辨,实现对目标的检测。仿真实验与实际雷达和干扰机对抗实验表明,该方法可以获得良好的抗干扰性能和目标检测性能。

关键词: 密集假目标干扰, 频率捷变, 最大类间方差法, 数学形态学, 二维稀疏重构

Abstract:

The digital radio frequency memory (DRFM) intercepts the radar transmitted signal and modulates and forwards it, forming deceptive interference on the range dimension, which seriously affects the radar's detection and tracking of targets. Aiming at the problem, a dense false target interference suppression algorithm based on frequency agility combined with mathematical morphology is proposed. Firstly, the pulse-compressed data is binarized by the Otsu method. Then, the opening operation of mathematical morphology is used to suppress the interference and noise. Finally, the range-velocity high resolution is realized and the detection of the target is achieved by 2-dimensional sparse reconstruction. Simulations and actual radar with jammers experiments show that the method proposed can obtain good anti-interference performance and target detection performance.

Key words: dense false target jamming, frequency agility, Otsu, mathematical morphology, 2-dimensional sparse reconstruction

中图分类号:

TN957.52

董淑仙, 全英汇, 陈侠达, 高霞, 李亚超, 邢孟道. 基于捷变频联合数学形态学的干扰抑制算法[J]. 系统工程与电子技术, 2020, 42(7): 1491-1498.

Shuxian DONG, Yinghui QUAN, Xiada CHEN, Xia GAO, Yachao LI, Mengdao XING. Interference suppression algorithm based on frequency agility combined with mathematical morphology[J]. Systems Engineering and Electronics, 2020, 42(7): 1491-1498.

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参数	数值
脉冲数	64
信号带宽/MHz	30
脉冲宽度/μs	6
跳频总数	128
目标距离/m	4 000
脉冲重复频率/kHz	25
步进带宽/MHz	10
初始载频/GHz	14
采样频率/MHz	60
目标速度/(m/s)	200

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基于捷变频联合数学形态学的干扰抑制算法

Interference suppression algorithm based on frequency agility combined with mathematical morphology

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