雷达对抗数字仿真系统

发布时间：2018-01-06 09:02

本文关键词：雷达对抗数字仿真系统　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：雷达对抗数字仿真系统是一个相对复杂的系统,对其建模仿真首先要进行方案设计,根据功能任务将整个仿真系统划分为雷达仿真子系统、自卫式干扰仿真子系统和效能评估仿真子系统。本文结合高层体系的软件结构的思想,采用分布式仿真的方式,在运行支撑框架平台上建立三个子系统联邦成员。首先,自卫式干扰子系统用来产生各种样式的干扰。基于引导式、转发式以及数字合成式系统结构,分别建立压制性干扰和欺骗性干扰仿真模型,并给出相应的仿真效果图。其次,雷达仿真子系统主要完成抗干扰过程。雷达发射的电磁波,在环境中产生包含目标信息、噪声、杂波的回波信号,然后与自卫式干扰子系统产生的干扰信号叠加进入到雷达接收机中,经过复杂的信号处理模块,一方面既要提高信噪比、另一方面又要抗干扰和杂波。该系统主要采用自适应旁瓣对消、旁瓣消隐、前沿跟踪等措施降低干扰幅度,再利用脉冲压缩、相参积累以及恒虚警检测等手段来提高信噪比与信杂比。对于机载雷达来说,地物杂波信号比较强,不仅要有针对性的抗干扰,也需要采取合适的方法减小杂波对目标检测的影响,得到的探测信息经数据处理,形成目标航迹,同时把信息发送到显控平台中。最后,在自卫式干扰和雷达子系统的基础上,建立的效能评估子系统是衡量机载雷达的最重要的性能指标。基于效能评估基本估准,分别介绍了压制式干扰和欺骗式干扰的评估方法,再结合层次分析法,提出了一个层次清晰分明、结构相对完整的性能指标体系,在仿真中通过计算这些指标,根据指标定性或者定量评估雷达的作战效能。本文建立的雷达对抗数字仿真系统主要用于电子干扰系统的方案优化和技术改进,提高电子干扰系统针对不同对象的干扰能力,为雷达对抗装备论证、新型干扰/抗干扰技术研究、干扰/抗干扰效能评估等提供一个通用的对抗仿真实验与研究平台。
[Abstract]:The radar countermeasure digital simulation system is a relatively complex system. The first step is to design the scheme for modeling and simulation. According to the function task, the whole simulation system is divided into radar simulation subsystem. Self-defense jamming simulation subsystem and effectiveness evaluation simulation subsystem. First, the self-defense interference subsystem is used to generate various types of interference. Based on the guided, forward and digital composite system structure. The simulation models of suppression jamming and deceptive jamming are established, and the corresponding simulation results are given. Secondly, the radar simulation subsystem mainly completes the anti-jamming process. In the environment, the echo signal including target information, noise and clutter is generated, and then superimposed with the interference signal generated by the self-defense jamming subsystem into the radar receiver, through the complex signal processing module. On the one hand, the signal-to-noise ratio (SNR) should be improved, on the other hand, anti-jamming and clutter should be improved. The system mainly uses adaptive sidelobe cancellation, sidelobe blanking, front tracking and so on to reduce the interference amplitude, and then use pulse compression. Coherent accumulation and CFAR detection are used to improve signal-to-noise ratio (SNR) and signal-to-clutter ratio (SSRR). For airborne radar, ground clutter signal is relatively strong, not only for targeted anti-jamming. It is also necessary to take appropriate methods to reduce the influence of clutter on target detection. The detected information is processed by data to form the target track, and the information is sent to the display and control platform at the same time. Finally. Based on the self-defense jamming and radar subsystem, the effectiveness evaluation subsystem is the most important performance index to evaluate airborne radar. The evaluation methods of suppression jamming and deceptive jamming are introduced respectively. Then a clear hierarchy and relatively complete performance index system is put forward with the help of analytic hierarchy process (AHP). These indexes are calculated in the simulation. The radar combat effectiveness is evaluated qualitatively or quantitatively according to the target. The radar countermeasure digital simulation system is mainly used for the scheme optimization and technical improvement of the electronic jamming system. Improve the jamming ability of the electronic jamming system for different objects, for the demonstration of radar countermeasures equipment, a new jamming / anti-jamming technology research. Jamming / anti-jamming effectiveness evaluation provides a general platform for simulation experiments and research.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN974

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