基于扩展单脉冲比的拖曳式诱饵存在性检测

doi:CNKI:11-1929/V.20110526.1752.014

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基于扩展单脉冲比的拖曳式诱饵存在性检测

宋志勇, 肖怀铁, 祝依龙, 卢再奇

国防科学技术大学 ATR重点实验室, 湖南长沙 410073

收稿日期:2010-11-17 修回日期:2011-02-25 出版日期:2011-09-25 发布日期:2011-09-16
通讯作者: 肖怀铁(1966-) 男,博士,教授,博士生导师。主要研究方向:雷达目标识别、智能信息处理。 E-mail: htxiao@126.com E-mail:htxiao@126.com
作者简介:宋志勇(1983-) 男,博士研究生,主要研究方向:雷达信号处理与抗干扰技术。 E-mail: zhiyongsong@163.com; 祝依龙(1983-) 男,博士研究生,主要研究方向:机动目标检测跟踪、多传感器信息融合; 卢再奇(1968-) 男,博士,副教授。主要研究方向:雷达目标识别技术。

Detection of Presence of Towed Radar Active Decoy Based on Extended Monopulse Ratio

SONG Zhiyong, XIAO Huaitie, ZHU Yilong, LU Zaiqi

National Key Laboratory of ATR, National University of Defense Technology, Changsha 410073, China

Received:2010-11-17 Revised:2011-02-25 Online:2011-09-25 Published:2011-09-16

摘要/Abstract

摘要： 诱饵的存在性检测是对抗拖曳式有源雷达诱饵干扰的前提,也是决定抗干扰效果的重要因素。当导引头雷达发射多个不同频率的脉冲信号时,在一定的检测处理时长内目标回波信号幅度服从瑞利分布,而诱饵干扰信号则是幅度固定的。基于导引头雷达波束内诱饵存在导致的回波特征变化,通过提取诱饵存在/不存在两种情况下雷达接收回波信号的幅度特征差异以及对应单脉冲比特性变化,推导了两种假设条件下比幅测角扩展单脉冲比的条件概率密度函数,并在此基础上提出了采用Neyman-Pearson准则的广义最大似然比(GLRT)诱饵存在性检测方法以及干扰检测处理流程。不同干扰场景和条件下的仿真实验验证了该检测方法的有效性,能够满足拖曳式诱饵干扰对抗的需求。

关键词: 拖曳式有源雷达诱饵, 电子对抗, 信号检测, 扩展单脉冲比, 广义最大似然比

Abstract: The detection of the presence of the decoy is the foundation of countering the towed radar active decoy (TRAD) and it determines the effect of the ECCM. When the radar seeker transmits several different frequency pulses, the echo amplitude of the target follows the Rayleigh distribution and that of the decoy is assumed fixed. This paper presents an analysis of the variation of the echo characteristic in the radar beam and when a towed decoy exists extracts the feature distinction of the echoes amplitude and the corresponding monopulse ratio under the two hypotheses that the decoy is present or not. The conditional probability density functions (pdfs) of the extended monopulse ratio are given when the radar seeker adopts the amplitude comparison monopulse under above two hypotheses are given. The detection of presence of the TRAD based on the generalized maximum likelihood ratio (GLRT) is developed which adopts the Neyman-Pearson method and the processing flow of the decoy detection is also given. Simulation results under different conditions and scenarios illustrate the performance of the proposed method is effective and satisfy the requirement of ECCM.

Key words: towed radar active decoy, electronic countermeasure, signal detection, extended monopulse ratio, generalized maximum likelihood ratio

中图分类号:

宋志勇, 肖怀铁, 祝依龙, 卢再奇. 基于扩展单脉冲比的拖曳式诱饵存在性检测[J]. 航空学报, 2011, 32(9): 1656-1668.

SONG Zhiyong, XIAO Huaitie, ZHU Yilong, LU Zaiqi. Detection of Presence of Towed Radar Active Decoy Based on Extended Monopulse Ratio[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(9): 1656-1668.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于扩展单脉冲比的拖曳式诱饵存在性检测

Detection of Presence of Towed Radar Active Decoy Based on Extended Monopulse Ratio

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