基于侦察干扰一体化的双干扰机系统对抗SAR-GMTI方法研究

doi:10.12305/j.issn.1001-506X.2023.10.13

Abstract

Abstract:

Aiming at the inherent defect of single jammer against synthetic aperture radar (SAR) system with ground moving target indication (GMTI), this defect is usually solved by using the idea of dual-jammer cooperative jamming. However, the jamming methods of dual-jammer cooperative jamming in the current public literature need to reconnoitre some key parameters of SAR-GMTI system in advance, such as the carrier platform speed, the nearest slant distance between the jammer and the carrier platform, and the self-position of the two jammers. The acquisition of these parameters usually requires complex reconnaissance equipment. To solve this problem, an implementation method of dual-jammer system against SAR-GMTI based on integration of reconnaissance and jamming is proposed. This method uses the layout of jammers and receivers as well as the time difference of arrival (TDOA) information between receivers to effectively solve the problem of reconnaissance key parameters of complex equipment, and simplifies the configuration of jamming system. The results show that, considering the measurement error of TDOA and the spacing error of two antennas in SAR-GMTI system, the proposed method can also generate false moving targets with controllable velocity and azimuth position. Theoretical analysis and simulation results verify the feasibility of the proposed method.

Key words: synthetic aperture radar (SAR), ground moving target indication (GMTI), deceptive jamming, time difference of arrival (TDOA)

CLC Number:

TN95

Yemin LIU, Yongzhen LI, Datong HUANG, Shiqi XING, Xiaowei YU. Research on the method of dual-jammer system against SAR-GMTI based on integration of reconnaissance and jamming[J]. Systems Engineering and Electronics, 2023, 45(10): 3098-3107.

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References 16

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参数	符号	取值
平台速度/(m·s^-1)	v_a	200
信号载频/GHz	f_c	10
信号带宽/MHZ	B	100
信号脉宽/μs	T_p	5
两天线间距/m	d	0.8
场景中心斜距/km	R₀	10
平台飞行高度/km	H	8
方位向采样频率/Hz	PRF	500

虚假运动目标	运动速度/(m·s^-1)	初始位置/m
目标1	-1	(0, 10 010)
目标2	-0.5	(10, 10 030)
目标3	0.5	(20, 10 030)
目标4	1	(30, 10 010)
目标5	0	(-20, 9 990)
目标6	0	(-5, 9 970)
目标7	0	(35, 9 970)
目标8	0	(50, 9 990)

虚假运动目标	速度估计/(m·s^-1)	速度估计误差/(m·s^-1)	定位估计/m	定位估计误差/m
目标1	-0.995	0.005	0.50	0.50
目标2	-0.497	0.003	10.60	0.60
目标3	0.507	0.007	20.52	0.52
目标4	0.997	-0.003	30.17	0.17

虚假运动目标	速度估计最大误差/(m·s^-1)	速度估计平均误差/(m·s^-1)	定位估计最大误差/m	定位估计平均误差/m
目标1	0.006	0.005	0.53	0.51
目标2	0.005	0.002	0.67	0.51
目标3	0.013	0.008	0.87	0.62
目标4	-0.005	-0.004	0.21	0.17

虚假运动目标	速度估计/(m·s^-1)	速度估计误差/(m·s^-1)	定位估计/m	定位估计误差/m
目标1	-0.994	0.006	0.55	0.55
目标2	-0.497	0.003	10.56	0.56
目标3	0.507	0.007	20.55	0.55
目标4	0.997	-0.003	30.22	0.22

Research on the method of dual-jammer system against SAR-GMTI based on integration of reconnaissance and jamming

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成像量化指标	目标1	目标2	目标3	目标4
真假目标偏移量误差/m	0.278 -0.213	0.218 -0.193	0.008 -0.333	0.250 0.223
真假目标速度估计误差/m	-0.005 0.004	-0.004 0.004	-0.001 0.007	-0.005 -0.004
真假目标定位估计误差/m	-0.028 0.416	-0.195 0.517	-0.234 0.506	-0.301 0.126
真假目标距离向 IRW/m	1.353 1.354	1.338 1.336	1.337 1.338	1.352 1.335
真假目标距离向 PSLR/dB	-13.831 -13.830	-13.416 -13.427	-13.416 -13.415	-13.824 -13.825
真假目标距离向 ISLR/dB	-11.377 -11.367	-10.847 -10.851	-10.842 -10.814	-11.374 -11.319
真假目标方位向 IRW/m	0.898 1.177	0.889 1.773	0.888 1.177	0.897 1.176
真假目标方位向 PSLR/dB	-13.800 -13.348	-13.252 -13.215	-13.197 -12.877	-13.802 -13.333
真假目标方位向 ISLR/dB	-11.318 -11.171	-10.914 -10.240	-10.870 -10.729	-11.305 -11.162

干扰方法	虚假运动目标序号	速度估计误差/(m·s^-1)	定位估计误差/m
本文所提方法	目标1	0.006	0.56
	目标2	0.003	0.56
	目标3	0.008	0.65
	目标4	-0.003	0.23
文献[2]所提方法	目标1	0.004	0.36
	目标2	0.004	0.23
	目标3	0.011	0.56
	目标4	0.001	0.16
文献[11]所提方法	目标1	-0.005	0.41
	目标2	0.003	0.56
	目标3	0.007	0.55
	目标4	0.004	0.18

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