密集虚假运动目标生成方法

doi:10.12305/j.issn.1001-506X.2022.05.10

摘要/Abstract

摘要：

传统的合成孔径雷达地面运动目标指示(synthetic aperture radar ground moving target indication, SAR-GMTI)欺骗干扰技术, 使用两台协同干扰机, 能够生成逼真的虚假运动目标, 但当生成密集虚假运动目标时, 干扰机所需计算量太大, 无法满足电子战中实时生成干扰信号的要求。因此, 本文提出了一种密集虚假运动目标快速生成算法。该算法通过对双干扰机生成的虚假静止目标干扰信号进行复系数调制以控制虚假目标相位, 使其能够被双通道SAR-GMTI系统检测为运动目标; 然后结合SAR大场景欺骗干扰生成技术来生成密集虚假运动目标以降低运算量, 使其具备一定的工程可实现性。仿真实验验证了文中所提方法的有效性。

关键词: 合成孔径雷达, 地面动目标指示, 虚假运动目标, 双干扰机协同, 欺骗干扰

Abstract:

The traditional synthetic aperture radar ground moving target indication (SAR-GMTI) deceptive jamming method based on dual synthetic jammers can generate very similar false moving targets. However, when the method is used to create a large number of false moving targets, the computational burden is very high, which does not meet the need for real-time jamming in electronic warfare. Therefore, we propose an algorithm for fast generation of dense false moving targets. This proposed method is based on the theory of dual jammers generating false stationary targets against dual-channel SAR-GMTI. By adding complex coefficient modulation to each jammer, the false targets can be detected as moving ones. In addition, by using an algorithm of SAR large scenes deception jamming, the computational burden is reduced when the jammer creates dense false moving targets which makes the proposed method applicable to engineering. Simulation experiments verify the effectiveness of the proposed method.

Key words: synthetic aperture radar (SAR), ground moving target indication (GMTI), false moving target, dual synergetic jammer, deceptive jamming

中图分类号:

TN95

纪朋徽, 代大海, 邢世其, 冯德军. 密集虚假运动目标生成方法[J]. 系统工程与电子技术, 2022, 44(5): 1502-1511.

Penghui JI, Dahai DAI, Shiqi XING, Dejun FENG. Dense false moving targets generation method[J]. Systems Engineering and Electronics, 2022, 44(5): 1502-1511.

图/表 15

图1

图2

表1

图3

表2

图4

表3

不同干扰方法下虚假目标的径向速度估计和方位位置估计"

干扰方法	目标	径向速度		方位位置
干扰方法	目标	估计 $\hat v$ _r/(m/s)	误差/(m/s)	估计 $\hat x$ /m	位置偏移(-R₀ $\hat v$ _r/V_a)/m	重定位/m	误差/m
单干扰机	p₁	-0.024 9	-0.024 9	60	1	59	-1
	p₂	-1.525	-1.525 0	60	61	-1	-61
	p₃	0.574 8	-0.025 2	-44	-23	-21	-1
	p₄	1.075	0.475	-44.1	-43	1.1	21.1
双干扰机	p₁	-0.024 9	-0.024 9	60	1	59	-1
	p₂	0.013 2	0.013 2	60.3	-0.5	60.8	0.8
	p₃	0.574 8	-0.025 2	-44	-23	-21	-1
	p₄	0.623 6	0.023 6	-44.3	-25	-19.3	0.7

表3

图5

表4

表5

虚假运动目标的径向速度和方位位置估计"

虚假目标	径向速度		方位位置
虚假目标	估计 $\hat v$ _r/(m/s)	误差/(m/s)	估计 $\hat x$ /m	位置偏移(-R₀ $\hat v$ _r/V_a)/m	重定位/m	误差/m
p₁	-0.626 7	-0.073 3	47.7	25.1	22.6	2.6
p₂	0.416 1	0.016 1	33.7	-16.6	50.3	0.3
p₃	-0.580 9	0.019 1	63.7	23.2	40.5	0.5
p₄	-0.828 0	-0.028 0	41.9	33.1	8.8	-1.2
p₅	0.563 5	-0.036 5	-33.5	-21.5	-12	-2
p₆	0.494 2	0.005 8	-59.8	-19.8	40	0
p₇	-0.477 9	-0.022 1	-30.1	19.1	-49.2	-0.8
p₈	0.680 2	0.019 8	-48.0	-27.2	-20.8	-0.8

表5

图6

图7

图8

图9

表6

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参数	数值
载频/GHz	10
调频带宽/MHz	70
平台速度/(m/s)	250
采样频率/MHz	100
脉冲重频/Hz	1 000
成像中心斜距/m	10 000
基线长度/m	4

目标	初始坐标	v_r/(m/s)	映射坐标
p₁	(20, R₀+30)	-0.7	(48, R₀+30)
p₂	(50, R₀+60)	0.4	(34, R₀+60)
p₃	(40, R₀-40)	-0.6	(64, R₀-40)
p₄	(10, R₀-20)	-0.8	(42, R₀-20)
p₅	(-10, R₀-20)	0.6	(-34, R₀-20)
p₆	(40, R₀-40)	0.5	(-60, R₀-40)
p₇	(-50, R₀+60)	-0.5	(-30, R₀+60)
p₈	(-20, R₀+30)	0.7	(-48, R₀+30)

方法	目标个数
方法	8个	16个	32个
文献[14]方法	1.63	2.43	4.29
本文方法	0.53	0.61	0.66

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