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

摘要/Abstract

摘要：

针对单干扰机生成虚假运动目标干扰方法在对抗具有地面运动目标指示(ground moving target indication, GMTI)功能的合成孔径雷达(synthetic aperture radar, SAR)系统时的固有缺陷, 通常通过利用双干扰机协同干扰的思路来解决这一问题。然而, 目前公开文献关于利用双干扰机协同生成虚假运动目标的干扰方法，均需要提前侦察出SAR-GMTI系统的载机平台速度、干扰机到载机平台最近斜距以及两部干扰机自身位置等关键参数, 而获取这些参数通常需要复杂的侦察设备。针对这一难题, 提出了一种基于侦察干扰一体化的双干扰机系统对抗SAR-GMTI的干扰方法, 该方法利用干扰机和接收机布站以及接收机间的到达时差(time difference of arrival, TDOA)信息, 有效地解决需复杂设备侦察关键参数的难题, 简化了干扰系统的配置。研究表明，在考虑TDOA测量误差以及SAR-GMTI系统两天线间距误差的情况下, 所提方法能够在双通道SAR-GMTI系统中生成速度和方位向位置可控的虚假运动目标。理论分析和仿真实验结果验证了所提方法的可行性。

关键词: 合成孔径雷达, 地面运动目标指示, 欺骗干扰, 到达时差

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)

中图分类号:

TN95

刘业民, 李永祯, 黄大通, 邢世其, 余晓伟. 基于侦察干扰一体化的双干扰机系统对抗SAR-GMTI方法研究[J]. 系统工程与电子技术, 2023, 45(10): 3098-3107.

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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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