發(fā)布時間：2018-11-12 15:18

【摘要】：隨著雷達技術水平不斷提高,雷達性能和指標的測試也變得越來越復雜,因此,在現代雷達的研制和調試過程中廣泛使用雷達信號模擬器。通用雷達信號模擬器是由雷達信號模擬軟件和儀器儀表組成,它充分利用了強大的虛擬儀器技術,具有經濟實用、信號形式多樣、波形參數可設等優(yōu)點。由于通用雷達信號模擬器中使用的儀器儀表容易獲取,因此,研發(fā)一種通用性好、集成度高和擴展性強的雷達信號模擬軟件具有重要的現實意義。本文首先深入討論了雷達信號模擬軟件的需求分析,提出了基于虛擬儀器開發(fā)具有模擬雷達發(fā)射信號與回波信號的雷達信號模擬軟件的總體設計方案,并采用結構化的思想對雷達信號模擬軟件進行了自頂向下的模塊劃分,且討論了各個模塊之間的相互關系。其次,說明了雷達信號模擬軟件的各組成模塊的詳細功能,其中,顯示模塊用于完成人機交互和對其他模塊的控制,信號模擬模塊用于模擬需要的雷達信號,接口模塊用于軟件與外界進行通信。接著,詳細地闡述了包括多種雷達發(fā)射信號模型、天線模型、目標模型、雜波模型、干擾模型和噪聲模型在內的雷達信號模型。然后,具體地討論了基于LabWindows/CVI平臺的雷達信號模擬軟件的設計與實現,并詳細地介紹了信號模擬模塊、接口模塊、顯示模塊等三大模塊的設計與實現,其中,信號模擬模塊包括信號樣式、IQ設置、天線設置、目標設置、雜波模擬、干擾模擬和噪聲模擬等七個子模塊,接口模塊包括LAN/GPIB接口和數據文件接口等兩個子模塊。最后,介紹了雷達信號模擬軟件的整個測試系統(tǒng)、測試原理和測試流程,并通過四個典型的測試用例測試了雷達信號模擬軟件的多種復雜發(fā)射信號模型、天線方向圖模型、天線運動模型、目標模型、雜波統(tǒng)計模型等模塊,從而證明了雷達信號模擬軟件的正確性和可靠性。與同類信號模擬軟件相比,本雷達信號模擬軟件實現了對多種復雜雷達發(fā)射信號和雷達回波信號的模擬功能,具有操作簡單、誤差小、精度高、易于功能擴展和軟件升級等優(yōu)點,可與多種儀器儀表組合成通用雷達信號模擬器,廣泛地應用于雷達測試領域。
[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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957.51

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本文編號：2327492