基于虚拟仪器的雷达信号模拟软件的设计与实现

发布时间：2018-11-12 15:18

【摘要】：随着雷达技术水平不断提高,雷达性能和指标的测试也变得越来越复杂,因此,在现代雷达的研制和调试过程中广泛使用雷达信号模拟器。通用雷达信号模拟器是由雷达信号模拟软件和仪器仪表组成,它充分利用了强大的虚拟仪器技术,具有经济实用、信号形式多样、波形参数可设等优点。由于通用雷达信号模拟器中使用的仪器仪表容易获取,因此,研发一种通用性好、集成度高和扩展性强的雷达信号模拟软件具有重要的现实意义。本文首先深入讨论了雷达信号模拟软件的需求分析,提出了基于虚拟仪器开发具有模拟雷达发射信号与回波信号的雷达信号模拟软件的总体设计方案,并采用结构化的思想对雷达信号模拟软件进行了自顶向下的模块划分,且讨论了各个模块之间的相互关系。其次,说明了雷达信号模拟软件的各组成模块的详细功能,其中,显示模块用于完成人机交互和对其他模块的控制,信号模拟模块用于模拟需要的雷达信号,接口模块用于软件与外界进行通信。接着,详细地阐述了包括多种雷达发射信号模型、天线模型、目标模型、杂波模型、干扰模型和噪声模型在内的雷达信号模型。然后,具体地讨论了基于LabWindows/CVI平台的雷达信号模拟软件的设计与实现,并详细地介绍了信号模拟模块、接口模块、显示模块等三大模块的设计与实现,其中,信号模拟模块包括信号样式、IQ设置、天线设置、目标设置、杂波模拟、干扰模拟和噪声模拟等七个子模块,接口模块包括LAN/GPIB接口和数据文件接口等两个子模块。最后,介绍了雷达信号模拟软件的整个测试系统、测试原理和测试流程,并通过四个典型的测试用例测试了雷达信号模拟软件的多种复杂发射信号模型、天线方向图模型、天线运动模型、目标模型、杂波统计模型等模块,从而证明了雷达信号模拟软件的正确性和可靠性。与同类信号模拟软件相比,本雷达信号模拟软件实现了对多种复杂雷达发射信号和雷达回波信号的模拟功能,具有操作简单、误差小、精度高、易于功能扩展和软件升级等优点,可与多种仪器仪表组合成通用雷达信号模拟器,广泛地应用于雷达测试领域。
[Abstract]:With the improvement of radar technology, the measurement of radar performance and targets becomes more and more complicated. Therefore, radar signal simulator is widely used in the development and debugging of modern radar. The general radar signal simulator is composed of the radar signal simulation software and the instrument. It makes full use of the powerful virtual instrument technology and has the advantages of economy and practicality, various signal forms, and the waveform parameters can be set. Because the instruments and instruments used in the general radar signal simulator are easy to obtain, it is of great practical significance to develop a kind of radar signal simulation software with good generality, high integration and strong expansibility. In this paper, the requirement analysis of radar signal simulation software is discussed, and the overall design scheme of radar signal simulation software based on virtual instrument is proposed. The top-down module partition of radar signal simulation software is carried out by using structured idea, and the relationship between each module is discussed. Secondly, the detailed functions of each component module of radar signal simulation software are explained. The display module is used to complete the man-machine interaction and control to other modules, and the signal simulation module is used to simulate the radar signal needed. The interface module is used to communicate with the outside world. Then, the radar signal models including various radar transmit signal models, antenna models, target models, clutter models, jamming models and noise models are described in detail. Then, the design and implementation of radar signal simulation software based on LabWindows/CVI platform are discussed, and the design and implementation of signal simulation module, interface module and display module are introduced in detail. The signal simulation module includes seven sub-modules: signal style, IQ setting, antenna setting, target setting, clutter simulation, interference simulation and noise simulation. The interface module includes two sub-modules: LAN/GPIB interface and data file interface. Finally, the whole testing system, testing principle and testing flow of radar signal simulation software are introduced. Through four typical test cases, a variety of complex transmitting signal models and antenna pattern models of radar signal simulation software are tested. The antenna motion model, target model, clutter statistical model and other modules are used to prove the correctness and reliability of radar signal simulation software. Compared with the similar signal simulation software, the radar signal simulation software realizes the simulation function of various complex radar transmitting signals and radar echo signals. It has the advantages of simple operation, small error and high precision. It is easy to extend function and upgrade software, and can be combined with various instruments to form a general radar signal simulator, which is widely used in radar testing field.
【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】：TN957.51

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