对SAR的二维联合调制间歇采样转发干扰

doi:10.12305/j.issn.1001-506X.2024.12.11

摘要/Abstract

摘要：

传统的间歇采样转发干扰在面对合成孔径雷达(synthetic aperture radar, SAR)时, 生成的假目标分布均匀、幅度相似, 且位置滞后于真实目标, 容易被对方识别。针对此缺点, 对间歇采样干扰进行改进, 提出一种对SAR的二维联合调制间歇采样转发干扰方法。所提方法通过控制间歇采样周期、移频调制序列、调频斜率调制序列等干扰参数, 对截获后的雷达信号进行二维联合调制转发, 在真实目标周围生成多个幅度与分布非均匀的欺骗干扰假目标和压制干扰区域。从间歇采样转发干扰出发, 建立所提方法的数学模型并给出干扰原理, 进一步分析所提方法的干扰性能。仿真实验结果证明了所提方法的正确性和有效性, 能够有效对抗SAR。

关键词: 合成孔径雷达, 间歇采样转发干扰, 欺骗干扰, 压制干扰, 移频调制, 调频斜率调制

Abstract:

The traditional interrupted sampling repeater jamming generates false targets with uniform distribution and similar amplitude when facing synthetic aperture radar (SAR), and their position lags behind the real target, which is easily recognized by the other party. In response to this drawback, the interrupted sampling jamming is improved, and a two-dimensional joint modulation interrupted sampling repeater jamming method for SAR is proposed. The proposed method controls sampling parameters such as interrupted sampling period, frequency shift modulation sequence, and frequency modulation slope modulation sequence to perform two-dimensional joint modulation repeater on the intercepted radar signal, generating multiple deceptive jamming false targets and suppressing jamming areas with non-uniform amplitude and distribution around the real target. Starting from the interrupted sampling repeater jamming, a mathematical model of the proposed method is established, and the jamming principle is provided, further analyzing the jamming performance of the proposed method. Simulation experimental result proves the correctness and effectiveness of the proposed method, which can effectively counter SAR.

Key words: synthetic aperture radar (SAR), interrupted sampling repeater jamming, deceptive jamming, suppression jamming, frequency shift modulation, frequency modulation slope modulation

中图分类号:

TN972

赵忠凯, 孙宇晗, 高路. 对SAR的二维联合调制间歇采样转发干扰[J]. 系统工程与电子技术, 2024, 46(12): 4026-4033.

Zhongkai ZHAO, Yuhan SUN, Lu GAO. Interrupted sampling repeater jamming of two-dimensional joint modulation for SAR[J]. Systems Engineering and Electronics, 2024, 46(12): 4026-4033.

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参数	取值
载波频率/GHz	5.4
脉宽/μs	25
带宽/MHz	60
多普勒带宽/Hz	1 240
平台运动速度/(m/s)	7 000
最近距离/km	800
等效天线尺寸/m	10

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