密集假信号存在下单脉冲雷达未分辨目标DOA估计

doi:10.12305/j.issn.1001-506X.2023.09.10

Abstract

Abstract:

Direction of arrival (DOA) estimation of unresolved targets in monopulse radar is a difficulty in the field of tracking radar anti-jamming. Existing methods usually assume that the jamming to signal ratio (JSR) is known, which limits its application in practical radar systems. To solve the problem of DOA estimation for unresolved targets in monopulse radar in the presence of dense false signals, a method of DOA estimation of unresolved targets without JSR prior information is proposed. Firstly, the decoy DOA is estimated by clustering the dense false signals, and then the analytical expression of target DOA estimation with decoy DOA as parameter is derived. Simulation results show that the proposed algorithm can accurately estimate the jamming and target DOA under dense false signal decoy.

Key words: unresolved target, dense false signal, direction of arrival (DOA) estimation, monopulse radar

CLC Number:

TN95

Qianlan HUANG, Fei CAI, Hongqi FAN, Huaitie XIAO. DOA estimation of unresolved targets in the presense of dense false signals with monopulse radar[J]. Systems Engineering and Electronics, 2023, 45(9): 2727-2734.

Figures/Tables 12

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References 21

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步骤	单脉冲	MOM^[4]	ML^[6]	本文算法
观测SNR	2N	2N	2N	2N
单脉冲比均值	4N	4N	-	4N
单脉冲比方差	-	4N	-	4N
核聚类	-	-	-	2M
角度估计	-	3	6N+6	6
总计算量	6N	10N+3	8N+6	10N+2M+6

类别	参数
初始位置/m	导弹(5 700, 1 820, 1 000);目标(0, 120, 1 000);诱饵(0, 0, 1 000)
飞行速度/(m/s)	导弹(-1 000, -100, 0);目标(0, 300, 0);诱饵(0, 300, 0)
其他	导引头波束宽度为6°;单脉冲角系数为1.6;拖曳线长度为120 m; 仿真时长为4 s; 初始SNR为16 dB; 初始干信比为-4~8 dB; 蒙特卡罗仿真1 000次

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DOA estimation of unresolved targets in the presense of dense false signals with monopulse radar

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