捷变频联合波形熵的密集假目标干扰抑制算法

doi:10.12305/j.issn.1001-506X.2021.06.07

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (6): 1506-1514.doi: 10.12305/j.issn.1001-506X.2021.06.07

捷变频联合波形熵的密集假目标干扰抑制算法

方文¹, 全英汇^1,*, 沙明辉², 刘智星¹, 高霞¹, 邢孟道³

1. 西安电子科技大学电子工程学院, 陕西西安 710071
2. 北京无线电测量研究所, 北京 100854
3. 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:2020-12-31 出版日期:2021-05-21 发布日期:2021-05-28
通讯作者: 全英汇
作者简介:方文(1996—), 男, 硕士研究生, 主要研究方向为雷达信号处理|全英汇(1981—), 男, 教授, 博士研究生导师, 博士，主要研究方向为捷变雷达信号处理|沙明辉(1986—), 男, 高级工程师, 硕士，主要研究方向为雷达抗干扰和信号处理|刘智星(1993—), 男, 博士研究生, 主要研究方向为雷达信号处理|高霞(1996—), 女, 硕士研究生, 主要研究方向为雷达信号处理|邢孟道(1974—), 男, 教授, 博士, 主要研究方向为SAR/ISAR成像和动目标检测
基金资助:
国家自然科学基金(61772397)

Dense false targets jamming suppression algorithm based on frequency agility and waveform entropy

Wen FANG¹, Yinghui QUAN^1,*, Minghui SHA², Zhixing LIU¹, Xia GAO¹, Mengdao XING³

1. School of Electronic Engineering, Xidian University, Xi'an 710071, China
2. Beijing Institute of Radio Measurement, Beijing 100854, China
3. National Lab of Radar Signal Processing, Xidian University, Xi'an 710071, China

Received:2020-12-31 Online:2021-05-21 Published:2021-05-28
Contact: Yinghui QUAN

摘要/Abstract

摘要：

密集假目标干扰具备欺骗性和压制性的双重特性, 严重影响雷达作战效能。对此, 提出一种捷变频联合波形熵的密集假目标干扰抑制算法。首先采用Kittler算法进行二值化处理；其次利用波形熵识别目标和干扰；然后采用局部离群因子检测算法对目标回波中叠加有较强干扰旁瓣的数据进行剔除; 最后采用稀疏重构算法进行脉间相参处理。数字仿真实验和外场实测数据处理结果验证了所提算法的有效性。算法性能分析结果表明, 当干信比为58 dB时, 所提算法仍能有效抑制干扰, 正确检测目标。

关键词: 密集假目标干扰, 频率捷变, 波形熵, 局部离群因子检测

Abstract:

Dense false target jamming has the dual characteristics of deception and suppression, which seriously affects the effectiveness of radar operations. Therefore, a jamming suppression algorithm based on frequency agility and waveform entropy is proposed. Firstly, the Kittler algorithm is used for binarization. Secondly, the waveform entropy is used to identify the target and interference. Then, the local outlier detection algorithm is used to eliminate the data with strong interference side lobes in the target echo. Finally, the sparse reconstruction algorithm is used to perform interpulse coherent processing. The results of digital simulation experiment and field measured data processing verify the effectiveness of the proposed algorithm. The algorithm performance analysis results show that when the interference signal ratio is 58 dB, the proposed algorithm can still effectively suppress the interference and correctly detect the target.

Key words: dense false targets jamming, frequency agility, waveform entropy, local outlier factor detection

中图分类号:

TN957.52

方文, 全英汇, 沙明辉, 刘智星, 高霞, 邢孟道. 捷变频联合波形熵的密集假目标干扰抑制算法[J]. 系统工程与电子技术, 2021, 43(6): 1506-1514.

Wen FANG, Yinghui QUAN, Minghui SHA, Zhixing LIU, Xia GAO, Mengdao XING. Dense false targets jamming suppression algorithm based on frequency agility and waveform entropy[J]. Systems Engineering and Electronics, 2021, 43(6): 1506-1514.

图/表 7

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参数	取值	参数	取值
目标1距离/km	10.000	目标1速度/(m/s)	150
目标2距离/km	10.025	目标2速度/(m/s)	210
目标3距离/km	10.068	目标3速度/(m/s)	250
信号脉宽/μs	4	信号带宽/MHz	20
脉冲重复频率/kHz	25	脉冲数	64
起始载频/GHz	8	跳频间隔/MHz	8
跳频总数	128	采样率/MHz	40

参数	数值
脉冲宽度/μs	4
脉冲重复周期/μs	250
信号带宽/MHz	20
采样率/MHz	60
脉冲数	128
跳频总数	256
载频跳变范围/GHz	33.2~34.2

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捷变频联合波形熵的密集假目标干扰抑制算法

Dense false targets jamming suppression algorithm based on frequency agility and waveform entropy

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