基于二次补偿的FDA-MIMO雷达抗主瓣欺骗式干扰方法

doi:10.12305/j.issn.1001-506X.2022.09.09

系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (9): 2769-2775.doi: 10.12305/j.issn.1001-506X.2022.09.09

基于二次补偿的FDA-MIMO雷达抗主瓣欺骗式干扰方法

张逸群, 兰岚*, 廖桂生, 许京伟

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:2021-10-22 出版日期:2022-09-01 发布日期:2022-09-01
通讯作者: 兰岚
作者简介:张逸群(1994—), 男, 博士研究生, 主要研究方向为波形分集雷达、雷达抗干扰方法|兰岚(1993—),女,准聘副教授,博士,主要研究方向为波形分集雷达、雷达抗干扰方法、MIMO雷达技术|廖桂生(1963—), 男, 教授, 博士, 主要研究方向为空时自适应处理、天基预警、多维度一体化波形设计、阵列信号处理|许京伟(1987—), 男, 副教授, 博士, 主要研究方向为雷达系统建模、多通道阵列信号处理、空时自适应处理、波形分集雷达
基金资助:
国家自然科学基金(61901501)

Mainlobe deceptive jammer suppression with FDA-MIMO radarbased on secondary compensation

Yiqun ZHANG, Lan LAN*, Guisheng LIAO, Jingwei XU

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

Received:2021-10-22 Online:2022-09-01 Published:2022-09-01
Contact: Lan LAN

摘要/Abstract

摘要：

主瓣欺骗式干扰与真实目标具有相同角度, 传统相控阵雷达无法在空域对其进行区分, 严重降低了对真实目标的探测性能。针对此问题, 本文在频率分集阵列多输入多输出(frequency diversity array multiple input multiple output, FDA-MIMO)雷达中提出一种基于二次补偿的抗主瓣欺骗式干扰方法。首先, 通过对脉内主值距离进行前移补偿和对距离频率进行后移补偿, 等效于将欺骗式干扰从方向图主瓣搬移到旁瓣。然后, 借助奇异谱分析技术进行样本筛选以获得干扰协方差矩阵。最后，利用自适应波束形成的方法对干扰进行抑制。仿真实验验证了所提抗干扰方法的有效性。

关键词: 主瓣欺骗式干扰抑制, 频率分集阵列多输入多输出雷达, 二次距离补偿, 奇异谱分析

Abstract:

The main-lobe deceptive jammers, which have the same angle as the true target, cannot be distinguished in the spatial domain with the traditional phased array radar system, reducing the performance of target detection seriously. To solve this problem, the method to suppress the mainlobe deceptive jammers based on secondary compensation is proposed with the frequency diversity array multiple input multiple output (FDA-MIMO) radar. Firstly, the forward compensation is performed to the principle range, and the backward compensation is implemented to the range frequency. Hence, the main-lobe deceptive jammers are equivalently moved to the sidelobes of the beampattern. Then, the jammer covariance matrix is obtained by selecting the samples resorting to the singular spectrum analysis technique. Finally, the jammers can be suppressed with adaptive beamforming. The effectiveness of the proposed jammer suppression method is verified by simulation results.

Key words: mainlobe deceptive jammer suppression, frequency diversity array multiple input multiple output (FDA-MIMO) radar, secondary range compensation, singular spectrum analysis

中图分类号:

TN95

张逸群, 兰岚, 廖桂生, 许京伟. 基于二次补偿的FDA-MIMO雷达抗主瓣欺骗式干扰方法[J]. 系统工程与电子技术, 2022, 44(9): 2769-2775.

Yiqun ZHANG, Lan LAN, Guisheng LIAO, Jingwei XU. Mainlobe deceptive jammer suppression with FDA-MIMO radarbased on secondary compensation[J]. Systems Engineering and Electronics, 2022, 44(9): 2769-2775.

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参数	取值	参数	取值
工作频率/GHz	16	脉冲重频/kHz	10
发射阵元数	16	接收阵元数	16
发射阵元间距/m	0.018 7	接收阵元间距/m	0.018 7
信噪比/dB	30	目标角度/(°)	0
假目标个数	4	主目标距离门	300
主目标距离数	0	假目标脉冲数	0, 2, 2, 3
假目标1JNR/dB	45	假目标1距离门	310
假目标2JNR/dB	25	假目标2距离门	200
假目标3JNR/dB	20	假目标3距离门	368
假目标4JNR/dB	30	假目标4距离门	334

基于二次补偿的FDA-MIMO雷达抗主瓣欺骗式干扰方法

Mainlobe deceptive jammer suppression with FDA-MIMO radarbased on secondary compensation

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