【作者】 曾跃；

【导师】 付耀文；

【作者基本信息】 国防科学技术大学 ， 电子与通信工程， 2010， 硕士

【摘要】 逆合成孔径雷达(ISAR)干扰技术已成为电子对抗领域的一个热点课题,本文重点开展了对基于目标电磁特性的欺骗式ISAR干扰技术的研究,并在此理论基础上,对欺骗式ISAR干扰机设计进行了初步的研究。论文首先介绍了ISAR的成像原理,对ISAR成像过程中的关键问题-运动补偿进行了具体分析,并对ISAR成像的两种具体算法,即RD成像处理算法和ESPRIT超分辨成像处理算法进行了仿真实验和分析。针对现有的欺骗式ISAR干扰技术存在的不足,提出了一种基于目标电磁特性生成虚假目标ISAR信号的新途径。其基本思路是利用散射中心模型对待模拟目标进行建模,然后根据测量或计算得到的目标电磁散射数据提取目标的三维散射中心,建立散射中心模型库,再根据目标的散射中心模型和待模拟目标的运动参数生成虚假调制信息,利用虚假信息对截获的雷达信号进行调制即可生成虚假目标的ISAR回波信号,研究结果表明该虚假信号生成方法可对ISAR形成有效的虚假目标欺骗式干扰。同时介绍了一种欺骗式ISAR干扰性能评估的方法,该方法借助模糊综合评判理论,综合考虑ISAR图像识别中的多种特征,能够对欺骗式ISAR干扰性能进行较好的评估。最后研究了欺骗式ISAR干扰机的工程实现问题,包括基于DRFM的欺骗式ISAR干扰机系统设计、DRFM的I\Q通道不均衡以及干扰功率需求问题,这些问题都是欺骗式ISAR干扰机研制过程中必须考虑的问题。更多还原

【Abstract】 Inverse synthetic aperture radar (ISAR) jamming technology becomes a hot issue in the electronic countermeasures field. This dissertation focuses on the research of ISAR deception jamming technique based on target electromagnetic characteristics, and then studies the design of ISAR jammer.Firstly, the principles of ISAR imaging are introduced, and the motion compensation, a key problem in ISAR imaging process, has been analyzed specifically. Two main algorithms of ISAR imaging, Range-Doppler (RD) algorithm and ESPRIT super-resolution algorithm, are simulated and analyzed.Aiming at the shortcomings of the existing ISAR deception jamming technology, a new approach to generate false targets in ISAR imaging based on the target electromagnetic characteristics is proposed. The basic steps are: 1. model the simulated target by scattering center model; 2. extract the 3D scattering center according to the target electromagnetic scattering data acquired by measuring or calculating to build up a library of scattering center; 3. generate false modulated information according to the target scattering center model and the motion parameters; 4. utilize the false information to modulate the intercepted radar signal to generate a false target in ISAR imaging. The results show that the false signal generation method can form an effective false target deception jamming to ISAR.A performance evaluating method of ISAR deception jamming is also introduced. Using the theory of fuzzy comprehensive evaluation and considering a variety of features of the ISAR image recognition, it can evaluate the performance of ISAR deception jamming well.At last, the realization of ISAR deception jammer is studied, including the ISAR deception jammer system design based on the Digital Radio Frequency Memory (DRFM), the influence of I\Q channel imbalance and interfering with the power demand, which should be considered in the ISAR deception jammer development process.更多还原