对SAR-GMTI的二维单音调制散射波干扰

doi:10.3969/j.issn.1001-506X.2020.08.07

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (8): 1685-1694.doi: 10.3969/j.issn.1001-506X.2020.08.07

对SAR-GMTI的二维单音调制散射波干扰

黄大通^1,²(), 邢世其^1,²(), 庞礴^1,²(), 李永祯^1,²(), 王雪松^1,²()

1. 国防科技大学电子科学学院, 湖南长沙 410073
2. 电子信息系统复杂电磁环境效应国家重点实验室, 湖南长沙 410073

收稿日期:2019-11-15 出版日期:2020-08-01 发布日期:2020-07-27
作者简介:黄大通(1993-),男,博士研究生,主要研究方向为合成孔径雷达信号处理与对抗。E-mail:huangdatong68@163.com|邢世其(1984-),男,副研究员,博士，主要研究方向为极化雷达成像、雷达信号处理以及合成孔径雷达对抗。E-mail:xingshiqi_paper@163.com|庞礴(1984-),男,讲师,博士，主要研究方向为极化信息处理、极化雷达成像、SAR成像技术。E-mail:pangbo84826@126.com|李永祯(1977-),男,研究员，博士研究生导师，博士，主要研究方向为极化雷达信号处理、雷达电子对抗。E-mail:e0061@sina.com|王雪松(1972-),男,教授,博士研究生导师,主要研究方向为极化雷达信号处理、雷达目标识别、雷达电子对抗、新体制雷达技术。E-mail:wxs19721019@sina.com
基金资助:
国家自然科学基金(61490692);国家自然科学基金(61901499)

Scattering-wave jamming against SAR-GMTI based on two dimensional single tune modulation

Datong HUANG^1,²(), Shiqi XING^1,²(), Bo PANG^1,²(), Yongzhen LI^1,²(), Xuesong WANG^1,²()

1. College of Electronic Science, National University of Defense Technology, Changsha 410073, China
2. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China

Received:2019-11-15 Online:2020-08-01 Published:2020-07-27
Supported by:
国家自然科学基金(61490692);国家自然科学基金(61901499)

摘要/Abstract

摘要：

针对传统散射波干扰对多通道合成孔径雷达地面动目标指示(synthetic aper ture radar ground moving target indication, SAR-GMTI)成像位置固定、无法掩护特定位置处运动目标的问题,提出了基于二维单音调制的散射波复合干扰方法。该方法将截获到的雷达信号作距离向和方位向的移频调制,对干扰的位置利用线性调频信号的时频耦合特性进行控制,将干扰信号放大后照射到散射目标。从理论上推导出了对SAR-GMTI干扰成像结果的解析表达式,并对干扰性能做了详细分析。理论分析与仿真结果表明,所提方法可有效解决传统散射波干扰无法掩护特定位置处运动目标的问题,实现在固定干扰机下对干扰成像位置的灵活控制,并可通过对散射点的布置控制干扰密集度。即使在较大侦察误差下仍能实现对SAR-GMTI的干扰,对实际工程应用具有一定参考价值。

关键词: 合成孔径雷达, 地面动目标指示, 散射波干扰, 时频耦合, 单音调制

Abstract:

Considering the problem that the imaging position of synthetic aperture radar ground moving target indication (SAR-GMTI) of the traditional scattering-wave jamming is fixed, which makes the moving targets at specific position exposed, a compound scattering-wave jamming method based on two dimensional single tune modulation is proposed. According to the time-frequency coupling characteristics of linear frequency modulation signal, this method implements the frequency modulation of intercepted SAR signal in both range and azimuth profiles to control the jamming area, and the modulated jamming is amplified and projected to the metal scatterers. The analytical expression of the jamming imaging result against SAR-GMTI is deduced theoretically and the jamming performance is also analyzed in detail. The theoretical analysis and simulation results demonstrate that the proposed method can tackle the problem that the traditional scattering-wave jamming cannot cover the moving target at any position, and realize the flexible control of jamming imaging area by a fixed jammer and the jamming density by deployment of scatters. The SAR-GMTI can still be jammed even under large scouting error, which will provide some reference value for engineering application.

Key words: synthetic aperture radar, ground moving target indication, scattering-wave jamming, time-frequency coupling, single tune modulation

中图分类号:

TN95

黄大通, 邢世其, 庞礴, 李永祯, 王雪松. 对SAR-GMTI的二维单音调制散射波干扰[J]. 系统工程与电子技术, 2020, 42(8): 1685-1694.

Datong HUANG, Shiqi XING, Bo PANG, Yongzhen LI, Xuesong WANG. Scattering-wave jamming against SAR-GMTI based on two dimensional single tune modulation[J]. Systems Engineering and Electronics, 2020, 42(8): 1685-1694.

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参数名称	数值
信号载频/GHz	10
信号脉宽/μs	20
信号带宽/MHz	100
脉冲重复频率/Hz	756
天线间隔/m	1
合成孔径长度/m	140
平台飞行速度/(m·s^-1)	200
平台高度/m	5 000

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对SAR-GMTI的二维单音调制散射波干扰

Scattering-wave jamming against SAR-GMTI based on two dimensional single tune modulation

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