多源反向交叉眼干扰技术研究

发布时间：2018-01-11 18:12

本文关键词：多源反向交叉眼干扰技术研究　出处：《国防科学技术大学》2016年博士论文　论文类型：学位论文

【摘要】：交叉眼干扰(Cross-Eye Jamming)通过发射两路或多路幅度近似相等、相位相差180°的干扰信号造成单脉冲雷达指向偏离,可以保护飞机/舰船等军事目标免于主动式雷达导引头的跟踪打击。自1958年提出以来,交叉眼干扰作为对抗单脉冲雷达最有效的干扰手段,在电子战领域持续受到广泛的关注,尤其近几年国内外对交叉眼干扰开展了大量的理论研究和试验验证。尽管如此,传统交叉眼干扰的实用化仍然面临着巨大的挑战,仍然受到苛刻的参数容限要求和较高的干信比需求等应用条件的限制。本文以克服传统交叉眼干扰的实用限制为目的,以增加干扰系统的自由度为解决途径,深入研究了基于反向阵列天线结构的多源反向交叉眼干扰(Multiple-Element Retrodirective Cross-Eye Jamming,MRCJ)理论,在对比MRCJ与传统交叉眼干扰的干扰性能的基础上,给出了MRCJ实用化的合理建议。第一章阐述了论文的课题研究背景及意义,重点论述了交叉眼干扰的研究现状,最后介绍了本文的主要工作。第二章系统分析了两源交叉眼干扰的若干问题。本章从相位波前扭曲的物理现象解释了交叉眼干扰的干扰原理;揭示了反向天线结构是交叉眼干扰实用化唯一有效途径的原因所在;总结了两源反向交叉眼干扰的研究成果和一般性结论;分析了两源交叉眼干扰的应用局限性,并指出增加系统自由度能有效提高交叉眼干扰的实用性。第三章提出了多源线阵反向交叉眼干扰(Multiple-Element Linear Retrodirective Cross-Eye Jamming,L-MRCJ),并给出了严格的数学推导。在两种不同的L-MRCJ干扰场景下,分别推导了单脉冲雷达的单脉冲比、单脉冲指示角和交叉眼增益。研究表明,L-MRCJ兼顾了线性反向天线阵列的多自由度和自调相优势,能够获得比两源反向交叉眼干扰更好的干扰性能。第四章分析了L-MRCJ的参数容限性能。通过定义表征L-MRCJ干扰性能的稳定角和角度因子,给出了参数容限的求解方法,分析了干扰距离、干扰环路基线比以及干扰环路差对参数容限的影响,并提出了克服上述因素影响的合理建议。实验结果表明,L-MRCJ的参数容限需求比两源反向交叉眼干扰更加宽松。第五章分析了存在平台反射回波时L-MRCJ的干扰性能。在对平台反射回波进行数学建模的基础上,推导了单脉冲雷达的总和、差通道回波,给出了总单脉冲比和总交叉眼增益的表达式。考虑到总交叉眼增益变为受平台反射回波相位决定的随机变量,在平台反射回波相位均匀分布的假设下,推导了总交叉眼增益的累积分布函数及其统计值。定义了L-MRCJ的干信比(Jammer-to-Signal Ratio,JSR),并推导了JSR与总交叉眼增益统计值之间的关系。研究表明,L-MRCJ能够以较低的JSR获得与两源反向交叉眼干扰相同的干扰性能。第六章提出了多源圆阵反向交叉眼干扰(Multiple-Element Circular Retrodirective Cross-Eye Jamming,C-MRCJ),并给出了严格的数学推导。针对平台转动会影响L-MRCJ和C-MRCJ的干扰性能的问题,提出了基于入射波到达角(Direction of Arrival,DOA)信息参数调制方向自适应调整的改进型C-MRCJ。研究表明,采用最优天线阵列结构的改进型C-MRCJ可以实现全方位持续的、稳健的干扰性能,突破了交叉眼干扰机要求搭载平台保持相对稳定的限制。第七章总结了本文的主要研究内容和原创性结论,并指出了未来的研究方向。
[Abstract]:Cross eye jamming (Cross-Eye Jamming) is approximately equal by the emission of two or more interference signal amplitude, phase difference of 180 degree caused by the single pulse radar pointing deviation, can protect the aircraft / ships and other military targets from active radar seeker tracking attack. Since the 1958 proposed, cross eye jamming against monopulse radar jamming means as the most effective in the field of electronic warfare, sustained attention, especially in recent years at home and abroad to carry out cross eye jamming theory and experiments verification. However, the traditional cross eye jamming utility still faces huge challenges, are still demanding tolerance parameters the SNR requirements of application conditions the higher requirements and restrictions. In order to overcome the limitations of traditional practical cross eye jamming for the purpose, in order to increase the degree of freedom system interference solution, studied deeply Reverse array antenna structure based on multi-source reverse cross eye jamming (Multiple-Element Retrodirective Cross-Eye Jamming, MRCJ) theory, based on interference performance comparison between MRCJ and traditional cross eye jamming on the reasonable suggestions are given to the practical application of MRCJ. The first chapter introduces the research background and significance of this thesis, mainly discusses the research status of cross eye interference, finally introduces the main work of this paper. The second chapter systematically analyzes some problems of two source cross eye jamming. This chapter from the distorted wavefront phase physical phenomenon explains the interference principle of cross eye jamming; reveals the reverse antenna structure is why cross eye jamming utility only effective way; summarizes the research results two source reverse cross eye jamming and the general conclusions; analyzes the application limitation of two source cross eye jamming, and pointed out that the increase of degree of freedom system Effectively improve the practicability of cross eye jamming. The third chapter puts forward the multi line reverse cross eye jamming (Multiple-Element Linear Retrodirective Cross-Eye Jamming, L-MRCJ), and gives the strict mathematical deduction. In two L-MRCJ interference in different scenarios are derived for the single pulse radar monopulse ratio, single pulse angle and indication cross eye gain. The results show that the linear L-MRCJ reverse antenna array with multiple degrees of freedom and self advantages, can earn more than two interference source reverse cross eye jamming better. The fourth chapter is the analysis of the parameters of the L-MRCJ tolerance performance. By stabilizing the angles and define the characterization of L-MRCJ interference factor is presented method of parameter tolerance, analyzes the interference distance interference loop and loop interference than the baseline difference effect on parameter tolerance, and puts forward reasonable proposals to overcome the effects of the Discussion. The experimental results show that the parameters of the L-MRCJ tolerance than two source reverse cross eye jamming more relaxed. The fifth chapter analyzes the performance of L-MRCJ platform. The existence of echo based on mathematical modeling of platform echo, deduces the sum of the single pulse radar, difference channel echo, given the general single pulse expression ratio and total cross eye gain. Considering the total cross eye gain is determined by random variable platform echo phase, the echo phase distribution platform is derived under the assumption that the total cross eye gain cumulative distribution function and statistical value. Define L-MRCJ SNR (Jammer-to-Signal Ratio, JSR), and the relationship between JSR and the total gain cross eye statistical values are derived. Research shows that L-MRCJ can lower the JSR and two reverse cross eye jamming source with the same performance. In the sixth chapter. A multi circle reverse cross eye jamming (Multiple-Element Circular Retrodirective Cross-Eye Jamming, C-MRCJ), and gives the strict mathematical deduction. According to the rotation of the platform will affect the performance of L-MRCJ and C-MRCJ problems is proposed based on the incident angle of arrival (Direction of, Arrival, DOA) of improved C-MRCJ. adaptive modulation parameter information the direction of the show, using the improved C-MRCJ array antenna structure optimization can achieve all-round sustained, steady interference performance breakthrough, cross eye jamming platform requirements keep relatively stable limit. The seventh chapter summarizes the main research content and conclusion, and points out the future research direction.

【学位授予单位】：国防科学技术大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN974

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