单脉冲雷达系统建模与欺骗干扰技术研究

发布时间：2018-11-10 09:01

【摘要】：单脉冲雷达是一种精密测角雷达,具备快速、高精度、抗干扰能力强等优点,在军事领域已经得到了广泛的应用。对单脉冲雷达的角度欺骗干扰技术研究已成为雷达电子对抗领域的一个研究重点,本文在对单脉冲雷达系统进行建模分析的基础上,研究了单脉冲雷达的角度欺骗干扰技术,主要研究内容如下:1、对单脉冲雷达系统的建模分析。根据雷达系统仿真理论以及分数阶傅里叶变换(Fractional Fourier Transform,FRFT)在处理线性调频信号时的优越性,设计了基于FRFT的雷达信号处理单元;并提出了一种基于FRFT的目标参数联合估计算法,实现了单脉冲雷达系统的仿真复现。2、研究单脉冲角度欺骗干扰技术。在研究传统的非相干干扰技术,相干干扰技术的基础上,对多干扰机协同工作场景下的相干干扰和反向交叉眼干扰进行了深入分析。着重研究了多干扰机反向交叉眼干扰时干,干扰机对间的相对幅相差以及回波对干扰性能的影响。本文通过严格的理论推导,结合仿真实验对这些干扰技术的干扰性能进行了分析与比较。3、研究单脉冲雷达干扰机设计。本文在研究单脉冲雷达干扰技术的基础上对角度欺骗干扰机的设计与实现进行了研究。首先,本文提出了一种基于压缩感知的DRFM干扰信号产生单元,该处理单元采用压缩感知技术对传统数字射频存储射频进行了优化,能够以较低的采样率与数据量产生干扰信号;然后,根据单脉冲角度干扰原理,采用压缩感知数字射频存储信号处理单元,提出了非相干角度拖拽式干扰与机载自卫式相干干扰两种干扰机,并设计了干扰工作方式。最后,通过仿真实验验证了两种干扰机的干扰性能。
[Abstract]:Monopulse radar (Monopulse radar) is a kind of precision angle-measuring radar, which has the advantages of high speed, high precision and strong anti-jamming ability. It has been widely used in military field. The research of angle deceptive jamming technology of monopulse radar has become a research focus in the field of radar electronic countermeasure. Based on the modeling and analysis of monopulse radar system, the angle deceptive jamming technology of monopulse radar is studied in this paper. The main contents are as follows: 1. Modeling and analysis of monopulse radar system. According to the theory of radar system simulation and the superiority of fractional Fourier transform (Fractional Fourier Transform,FRFT) in processing LFM signal, a radar signal processing unit based on FRFT is designed. A joint estimation algorithm of target parameters based on FRFT is proposed, and the simulation of monopulse radar system is realized. 2. The technique of monopulse angle deception jamming is studied. Based on the research of the traditional incoherent interference and coherent interference, the coherent interference and the reverse cross-eye interference in the multi-interference cooperative working scene are deeply analyzed. In this paper, the relative amplitude difference and the effect of echo on the jamming performance of the multi-jammers are studied in detail, including the interference time, the relative amplitude difference between the jammers and the effect of echo on the jamming performance. In this paper, the jamming performance of these jamming techniques is analyzed and compared by strict theoretical derivation and simulation experiments. 3. The design of monopulse radar jammer is studied. Based on the research of monopulse radar jamming technology, the design and implementation of angle deceptive jammer are studied in this paper. Firstly, a DRFM interference signal generation unit based on compressed sensing is proposed. The processing unit optimizes the traditional digital RF storage radio frequency by using compression sensing technology, which can generate interference signals with low sampling rate and data volume. Then, according to the principle of monopulse angle interference, two kinds of jamming devices, non-coherent angle drag jamming and airborne self-defense coherent interference, are proposed by using compressed sensing digital RF memory signal processing unit, and the jamming mode is designed. Finally, the jamming performance of two kinds of jammer is verified by simulation experiment.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN974

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