抗干扰导航接收机的设计与实现

发布时间：2018-09-08 18:58

【摘要】：目前,卫星导航系统在民用和军事领域都有很广泛的应用,影响着国家的科技实力和军事实力。但卫星导航系统由于工作环境复杂并且自身信号的脆弱性,极易受到环境中干扰的影响。并且因为其在各领域中的重要作用,也会面临各种人为设置的干扰,这种干扰很容易造成接收机无法正常工作。因此,从20世纪90年代开始,国外对卫星导航系统抗干扰技术的理论和实现都做了大量研究。国内的研究起步比较晚,但学习了国外的研究经验目前进展迅速。在此背景下,本文研究了抗干扰系统的抗干扰原理,并完成了数字信号处理板的硬件设计和实现。首先,本文研究了卫星导航系统的抗干扰原理。针对接收机在环境中受到的干扰,并将干扰进行了分类和分析,这将有益于抗干扰技术的研究。在此基础上,本文分析了导航抗干扰系统的总体结构和各部分功能。可以看出数字信号处理板是抗干扰算法实现的平台,也是抗干扰系统的核心模块。本文还根据处理域的不同,介绍了几类抗干扰滤波技术的算法原理,并分析了它们的优势和缺陷。其次,本文的重点是数字信号处理板的整体硬件设计和实现。介绍了数字信号处理板的整体结构和信号处理流程,详细描述了 A/D模块、D/A模块和FPGA模块等主要模块的芯片选型和外围电路设计,还给出了数字信号处理板整体的PCB板设计和硬件实物。最后,本文分两部分对抗干扰系统进行了测试。先在室内对数字信号处理板的每个模块进行测试并给出了实验结果,然后通过外场实验验证抗干扰系统整机的抗干扰能力。根据实验结果,本文设计的数字信号处理板可以在抗干扰系统中发挥作用,实现抗干扰功能。
[Abstract]:At present, the satellite navigation system is widely used in both civil and military fields, which affects the scientific and military strength of the country. However, the satellite navigation system is vulnerable to environmental interference because of its complex working environment and the fragility of its own signal. And because of its important role in various fields, it will also face a variety of artificial interference, this kind of interference is easy to cause the receiver can not work properly. Therefore, since 1990's, there has been a lot of research on the theory and realization of anti-jamming technology of satellite navigation system in foreign countries. Domestic research started relatively late, but learning from foreign research experience is developing rapidly. In this background, the anti-jamming principle of the anti-jamming system is studied, and the hardware design and implementation of the digital signal processing board are completed. Firstly, the anti-jamming principle of satellite navigation system is studied. The interference of the receiver in the environment is classified and analyzed, which will be beneficial to the research of anti-jamming technology. On this basis, this paper analyzes the overall structure and functions of the navigation anti-jamming system. It can be seen that the digital signal processing board is the platform of anti-interference algorithm and the core module of anti-jamming system. This paper also introduces the algorithm principle of several kinds of anti-jamming filtering technology according to the different processing domain, and analyzes their advantages and disadvantages. Secondly, the emphasis of this paper is the whole hardware design and implementation of digital signal processing board. This paper introduces the whole structure and signal processing flow of the digital signal processing board, and describes in detail the chip selection and peripheral circuit design of the main modules, such as the A / D module, the D / A module and the FPGA module, etc. The PCB board design and hardware object of the whole digital signal processing board are also given. Finally, this paper divides two parts to carry on the test to the anti-jamming system. Each module of the digital signal processing board is tested in the room and the experimental results are given. Then the anti-interference ability of the anti-jamming system is verified by the field experiment. According to the experimental results, the digital signal processing board designed in this paper can play a role in anti-jamming system and realize anti-interference function.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN965.5

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