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

系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (9): 2727-2734.doi: 10.12305/j.issn.1001-506X.2023.09.10

密集假信号存在下单脉冲雷达未分辨目标DOA估计

黄倩兰¹, 蔡飞², 范红旗¹, 肖怀铁¹^,*

1. 国防科技大学电子科学学院, 湖南长沙 410073
2. 湖南师范大学信息科学与工程学院, 湖南长沙 410081

收稿日期:2021-11-11 出版日期:2023-08-30 发布日期:2023-09-05
通讯作者: 肖怀铁
作者简介:黄倩兰 (1995—), 女, 博士研究生, 主要研究方向为雷达信号处理、目标跟踪、多源多目标统计信息融合
蔡飞 (1987—), 男, 博士, 讲师，主要研究方向为雷达系统、信息融合
范红旗 (1978—), 男, 研究员, 硕士研究生导师, 博士, 主要研究方向为主动感知系统、信息融合、智能导引
肖怀铁 (1966—), 男, 教授, 博士研究生导师, 博士, 主要研究方向为自动目标识别、雷达信号处理、机器学习

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

Qianlan HUANG¹, Fei CAI², Hongqi FAN¹, Huaitie XIAO¹^,*

1. School of Electronic Sciences, National University of Defense Technology, Changsha 410073, China
2. College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China

Received:2021-11-11 Online:2023-08-30 Published:2023-09-05
Contact: Huaitie XIAO

摘要/Abstract

摘要：

单脉冲雷达未分辨目标波达方向(direction of arrival, DOA)估计是跟踪雷达抗干扰领域的一个难点问题, 现有方法通常假定干信比已知, 限制了其在实际雷达系统中的应用。针对密集假信号存在下的单脉冲雷达未分辨目标DOA估计问题, 提出了一种无需干信比先验信息的未分辨目标DOA估计方法。首先通过对密集假信号聚类估计出诱饵DOA, 然后推导了以诱饵DOA为参数的目标DOA估计解析表达式。仿真结果表明, 所提算法能在密集假信号干扰下准确估计干扰和目标DOA。

关键词: 未分辨目标, 密集假信号, 波达方向估计, 单脉冲雷达

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

中图分类号:

TN95

黄倩兰, 蔡飞, 范红旗, 肖怀铁. 密集假信号存在下单脉冲雷达未分辨目标DOA估计[J]. 系统工程与电子技术, 2023, 45(9): 2727-2734.

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.

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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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密集假信号存在下单脉冲雷达未分辨目标DOA估计

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

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