發(fā)布時(shí)間：2018-06-28 16:52

  本文選題：GPS + 空時(shí)二維濾波��； 參考：《電子科技大學(xué)》2013年碩士論文

【摘要】：最初作為輔助導(dǎo)航的工具而發(fā)展起來(lái)的全球衛(wèi)星導(dǎo)航定位系統(tǒng)（GPS）現(xiàn)已在軍用和民用領(lǐng)域得到了廣泛的應(yīng)用，但其在軍事行動(dòng)中暴露出的易受干擾的缺陷也備受關(guān)注。因精密制導(dǎo)武器優(yōu)勢(shì)的充分發(fā)揮要極大的依賴GPS系統(tǒng)的完整性和抗干擾能力，而若從GPS衛(wèi)星星座出發(fā)提高系統(tǒng)抗干擾能力，則會(huì)造成硬件成本的上升和開發(fā)周期的延長(zhǎng)。所以可從GPS接收機(jī)出發(fā)提高抗干擾能力，且基于軟件的抗干擾設(shè)計(jì)由于其易于維護(hù)和成本較低的優(yōu)點(diǎn)將會(huì)在更多領(lǐng)域得到應(yīng)用。 本文基于現(xiàn)有的GPS接收機(jī)的硬件資源，在其內(nèi)部的一款A(yù)ltera的芯片EP3C120F484上進(jìn)行自適應(yīng)抗干擾算法的設(shè)計(jì)。 首先對(duì)純空域和空時(shí)二維自適應(yīng)濾波的基礎(chǔ)理論進(jìn)行介紹和仿真分析，可看出空時(shí)二維算法相對(duì)于純空域算法具有明顯的優(yōu)勢(shì)。而后從GPS接收機(jī)AD轉(zhuǎn)換后數(shù)據(jù)的頻譜特性和零中頻數(shù)字信號(hào)的處理流程這兩點(diǎn)出發(fā)，研究了具體的自適應(yīng)抗干擾系統(tǒng)的整體框架。并針對(duì)整體模塊的每個(gè)小模塊進(jìn)行詳細(xì)的算法設(shè)計(jì)、Matlab浮點(diǎn)仿真和FPGA定點(diǎn)仿真。 而整個(gè)GPS接收機(jī)的自適應(yīng)抗干擾系統(tǒng)的核心部分就是自適應(yīng)抗干擾算法的設(shè)計(jì)，考慮到芯片的資源情況，最后選擇LMS自適應(yīng)跟蹤算法，而由于LMS算法的局限性從而引進(jìn)了DLMS算法，并依據(jù)DLMS算法結(jié)構(gòu)實(shí)現(xiàn)純空域和空時(shí)二維信號(hào)的自適應(yīng)濾波。 最后，將本文設(shè)計(jì)好并用FPGA實(shí)現(xiàn)的GPS自適應(yīng)抗干擾算法集成到整個(gè)GPS接收機(jī)系統(tǒng)，，并通過(guò)整個(gè)系統(tǒng)的室外抗干擾測(cè)試結(jié)果，進(jìn)一步分析此自適應(yīng)抗干擾系統(tǒng)的正確性和其性能的優(yōu)劣。
[Abstract]:The Global Satellite Navigation and Positioning system (GPS), which was originally developed as a tool to assist navigation, has been widely used in military and civilian fields, but its vulnerability to interference in military operations has attracted much attention. Because the advantage of precision guidance weapon depends heavily on the integrity and anti-jamming ability of GPS system, if the anti-jamming ability is improved from GPS satellite constellation, the hardware cost will be increased and the development period will be prolonged. Therefore, the anti-jamming ability can be improved from GPS receiver, and the software based anti-jamming design will be applied in more fields because of its advantages of easy maintenance and low cost. Based on the hardware resources of the existing Altera receiver, this paper designs an adaptive anti-jamming algorithm on an Altera chip EP3C120F484. Firstly, the basic theory of pure spatial domain and space-time two-dimensional adaptive filtering is introduced and simulated. It can be seen that space-time two-dimensional algorithm has obvious advantages over pure spatial domain algorithm. Based on the spectrum characteristics of AD converted data and the processing flow of zero-if digital signal, the whole frame of adaptive anti-jamming system is studied. At the same time, the detailed algorithm design for each small module of the whole module is carried out, and Matlab floating-point simulation and FPGA fixed-point simulation are carried out. The core of the whole GPS receiver adaptive anti-jamming system is the design of adaptive anti-jamming algorithm. Considering the resource of the chip, the LMS adaptive tracking algorithm is selected. Due to the limitation of LMS algorithm, DLMS algorithm is introduced, and adaptive filtering of pure spatial and space-time signals is realized according to DLMS algorithm structure. Finally, the GPS adaptive anti-jamming algorithm implemented by FPGA is integrated into the whole GPS receiver system, and the outdoor anti-jamming test results of the whole system are given. The correctness and performance of the adaptive anti-jamming system are analyzed.
【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】：2013
【分類號(hào)】：P228.4

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王懷興;;基于LabVIEW的周期信號(hào)分解與合成實(shí)驗(yàn)研究[J];湖北第二師范學(xué)院學(xué)報(bào);2010年08期

2 石云霞,張志偉,范秋華;Matlab在濾波器設(shè)計(jì)中的應(yīng)用[J];青島建筑工程學(xué)院學(xué)報(bào);2004年02期

3 石云霞;計(jì)算機(jī)輔助教學(xué)在信號(hào)與系統(tǒng)中的應(yīng)用[J];青島職業(yè)技術(shù)學(xué)院學(xué)報(bào);2003年04期

4 初仁欣,趙偉,董小剛;數(shù)字合成周期信號(hào)的頻譜及信噪比[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年01期

5 李芙英,陳翔,葛榮尚;基于Rogowski線圈和壓頻變換的電流測(cè)量方法[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年03期

6 趙波;王化祥;胡理;;基于Walsh函數(shù)的電阻抗層析成像激勵(lì)模式[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年10期

7 于馨燕;;系統(tǒng)理論視角下的品牌生態(tài)商業(yè)模型構(gòu)建[J];企業(yè)經(jīng)濟(jì);2011年09期

8 劉明;基于MATLAB的信號(hào)與系統(tǒng)仿真分析[J];瓊州大學(xué)學(xué)報(bào);2004年02期

9 周翠;王路;;多抽樣率信號(hào)處理理論及其應(yīng)用研究[J];軟件導(dǎo)刊;2007年21期

10 馬雋巖;;遠(yuǎn)程視頻監(jiān)控系統(tǒng)的研究和實(shí)現(xiàn)[J];軟件導(dǎo)刊;2008年02期

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