基于时变材料的合成孔径雷达图像二维调制方法

doi:10.12305/j.issn.1001-506X.2022.02.13

摘要/Abstract

摘要：

合成孔径雷达(synthetic aperture radar, SAR)能够通过高分辨图像中的尺寸、姿态、外形轮廓等关键信息对目标进行探测与识别，对关键军事目标造成了严重的威胁。如何有效控制目标的雷达特征，使其不易被SAR发现与分辨，已经成为干扰领域的关键问题。相较于有源干扰，无源干扰具有成本低、响应速度快、操作简单等优势，然而灵活性差、难以脉内调制一直困扰着无源干扰的发展。针对上述问题，提出一种基于时变材料的SAR图像二维调制方法。该方法利用相位调制表面(phase-switched screen, PSS)并采用电控的方式对雷达信号脉内脉间进行联合调制。通过控制调制参数，可以实现距离向、方位向和二维多假目标图像的灵活切换。实测SAR图像数据事后调制仿真验证了所提方法的有效性。

关键词: 合成孔径雷达, 相位调制表面, 二维调制, 多假目标

Abstract:

Synthetic aperture radar (SAR) can detect and recognize targets through key information such as size, attitude and contour in high-resolution images, which poses a serious threat to key military targets. How to effectively control the radar characteristics of targets so that they are not easy to be found and distinguished by SAR has become a key problem in the field of jamming. Compared with active jamming, passive jamming has the advantages of low cost, fast response speed and simple operation. However, poor flexibility and difficult in pulse modulation have plagued the development of passive jamming. To solve the above problems, a two-dimensional modulation method of SAR image based on time-varying materials is proposed. This method uses phase-switched screen (PSS) and electronic control to jointly modulate the intra pulse and inter pulse of radar signal. By controlling the modulation parameters, the flexible switching of range, azimuth and two-dimensional multi false target images can be realized. Real time simulation of SAR image data shows the effectiveness of the proposed method.

Key words: synthetic aperture radar (SAR), phase-switched screen (PSS), two-dimensional modulation, multiple false targets

中图分类号:

TN955

王俊杰, 冯德军, 胡卫东. 基于时变材料的合成孔径雷达图像二维调制方法[J]. 系统工程与电子技术, 2022, 44(2): 455-462.

Junjie WANG, Dejun FENG, Weidong HU. Two-dimensional SAR image modulation method based on time-varying materials[J]. Systems Engineering and Electronics, 2022, 44(2): 455-462.

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参数	取值	参数	取值
f₀/GHz	2	B_m/Hz	66.67
B/MHz	150	T_P/μs	1
K_r/(Hz/s)	1.5×10¹⁴	K_a/(Hz/s)	33.33
v/(m/s)	100	T_L/s	2
f_s/MHz	10	f_m/Hz	3.33

参数	取值	参数	取值
f₀/GHz	9	T_P/μs	2
B/MHz	300	K_a/(Hz/s)	90
K_r/(Hz/s)	1.5×10¹⁴	v/(m/s)	180
f_s/MHz	20	f_m/Hz	10

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