【摘要】：目前,衛(wèi)星導(dǎo)航系統(tǒng)在民用和軍事領(lǐng)域都有很廣泛的應(yīng)用,影響著國(guó)家的科技實(shí)力和軍事實(shí)力。但衛(wèi)星導(dǎo)航系統(tǒng)由于工作環(huán)境復(fù)雜并且自身信號(hào)的脆弱性,極易受到環(huán)境中干擾的影響。并且因?yàn)槠湓诟黝I(lǐng)域中的重要作用,也會(huì)面臨各種人為設(shè)置的干擾,這種干擾很容易造成接收機(jī)無(wú)法正常工作。因此,從20世紀(jì)90年代開(kāi)始,國(guó)外對(duì)衛(wèi)星導(dǎo)航系統(tǒng)抗干擾技術(shù)的理論和實(shí)現(xiàn)都做了大量研究。國(guó)內(nèi)的研究起步比較晚,但學(xué)習(xí)了國(guó)外的研究經(jīng)驗(yàn)?zāi)壳斑M(jìn)展迅速。在此背景下,本文研究了抗干擾系統(tǒng)的抗干擾原理,并完成了數(shù)字信號(hào)處理板的硬件設(shè)計(jì)和實(shí)現(xiàn)。首先,本文研究了衛(wèi)星導(dǎo)航系統(tǒng)的抗干擾原理。針對(duì)接收機(jī)在環(huán)境中受到的干擾,并將干擾進(jìn)行了分類(lèi)和分析,這將有益于抗干擾技術(shù)的研究。在此基礎(chǔ)上,本文分析了導(dǎo)航抗干擾系統(tǒng)的總體結(jié)構(gòu)和各部分功能。可以看出數(shù)字信號(hào)處理板是抗干擾算法實(shí)現(xiàn)的平臺(tái),也是抗干擾系統(tǒng)的核心模塊。本文還根據(jù)處理域的不同,介紹了幾類(lèi)抗干擾濾波技術(shù)的算法原理,并分析了它們的優(yōu)勢(shì)和缺陷。其次,本文的重點(diǎn)是數(shù)字信號(hào)處理板的整體硬件設(shè)計(jì)和實(shí)現(xiàn)。介紹了數(shù)字信號(hào)處理板的整體結(jié)構(gòu)和信號(hào)處理流程,詳細(xì)描述了 A/D模塊、D/A模塊和FPGA模塊等主要模塊的芯片選型和外圍電路設(shè)計(jì),還給出了數(shù)字信號(hào)處理板整體的PCB板設(shè)計(jì)和硬件實(shí)物。最后,本文分兩部分對(duì)抗干擾系統(tǒng)進(jìn)行了測(cè)試。先在室內(nèi)對(duì)數(shù)字信號(hào)處理板的每個(gè)模塊進(jìn)行測(cè)試并給出了實(shí)驗(yàn)結(jié)果,然后通過(guò)外場(chǎng)實(shí)驗(yàn)驗(yàn)證抗干擾系統(tǒng)整機(jī)的抗干擾能力。根據(jù)實(shí)驗(yàn)結(jié)果,本文設(shè)計(jì)的數(shù)字信號(hào)處理板可以在抗干擾系統(tǒng)中發(fā)揮作用,實(shí)現(xiàn)抗干擾功能。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN965.5

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