【作者】 张少锋；

【导师】 张林让；

【作者基本信息】 西安电子科技大学 ， 信号与信息处理， 2011， 硕士

【摘要】 随着现代战争对雷达探测系统的“四抗”能力要求的越来越高,无源雷达由于具有隐蔽性好、作用距离远等优点而得到了广泛的研究和应用。利用仿真的手段对无源雷达系统进行建模与仿真,分析其性能,成为当前研究的重要方向。本文首先提出了基于Simulink和Visual C++平台的无源雷达仿真系统的设计方案。仿真模型库是仿真软件的基础,详细介绍了无源雷达信号处理过程中的关键模型的建立过程。参数测量是形成脉冲描述字(PDW)的基础,首先建立了参数测量模型,不仅能够测量时域、频域和空域参数,而且可以识别脉内调制类型和提取脉内调制参数;雷达信号分选是电子对抗的关键技术,而主要的分选方法是基于参数PRI的,本文对PRI变换法进行了详细阐述,并建立了信号分选模型;对感兴趣的辐射源要确定其位置,选取测向测时差定位法,建立了无源定位模型,并分析了其定位精度。最后对搭建的无源雷达系统进行了仿真,仿真结果验证了系统的正确性。更多还原

【Abstract】 As the growing capacity requirement of the four-anti radar system in modern war, the passive radar has been studied and applied widely due to the advantages of fine concealment and long-distance detection. Modeling, simulatiing and analyzing the performance of passive radar system mode by simulation method has become an important research filed now.This dissertation employs a combination of Simulink and Visual C++ platform to establish passive radar model libraries and simulation system with the model libraries. The formation of the pulse description word is the basis of passive radar signal processing. This dissertation first introduces parameter measurement model which can measure the time domain, frequency domain and spatial domain parameter, gives an intra-pulse modulation mode and extract intra-pulse modulation parameter. Moreover, radar signal sorting is a key technology of electronic countermeasures. This dissertation gives a detailed description of the main sorting method which is based on parameter PRT, and establishes the signal sorting model. In order to determine the interested emitter’s position. Finally, the passive radar system is constructed and simulated. Simulation results validate the correctness of the above system.更多还原