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1、本科畢業(yè)設(shè)計(2013屆)題目轉(zhuǎn)發(fā)式GPS欺騙干擾機的仿真建模與實現(xiàn)學(xué)院通信工程學(xué)院專業(yè)信息對抗技術(shù)班級09083511學(xué)號09083132學(xué)生姓名張喜合指導(dǎo)教師孫閩紅完成日期2012年12月摘要隨著科學(xué)技術(shù)的進步,GPS系統(tǒng)得到了廣泛的應(yīng)用。有效地利用GPS干擾技術(shù)破壞對方的導(dǎo)航系統(tǒng)并實現(xiàn)對己方的有效隱蔽和保護,是GPS技術(shù)在軍事領(lǐng)域的一個新應(yīng)用。在眾多干擾技術(shù)中,轉(zhuǎn)發(fā)式干擾有著發(fā)射功率低,不需要了解GPS信號偽碼結(jié)構(gòu),實現(xiàn)簡單等優(yōu)點。本文主要研究GPS轉(zhuǎn)發(fā)式干擾原理。在分析了GPS定位原理的基礎(chǔ)上,對轉(zhuǎn)發(fā)式干擾進行了可行性分析,完
2、成了轉(zhuǎn)發(fā)式干擾原理樣機的設(shè)計與實現(xiàn),并著重對干擾機的射頻電路進行了研究。轉(zhuǎn)發(fā)式干擾主要是利用信號的自然延時來實施干擾。因此,干擾信號與導(dǎo)航信號完全相同,只是延遲時間有所不同。另外轉(zhuǎn)發(fā)式干擾信號經(jīng)過功率放大,信號的幅度大于導(dǎo)航信號的幅度,GPS接收機完全有可能捕獲到轉(zhuǎn)發(fā)后的信號。從而使GPS接收機獲得錯誤的偽距,達不到精確的定位。本文在第一章和第二章中不僅詳細(xì)敘述了GPS的發(fā)展歷程和發(fā)展現(xiàn)狀,還對它的發(fā)展前景做了大致的估計,并簡要概括了GPS信號的基本組成。在第三章,主要對干擾機的各部分功能進行細(xì)化和進一步的模塊化設(shè)計,將總體模型分為三
3、個單元,包括:信號接收單元、干擾信號生成單元、干擾信號發(fā)送單元。第四章則著重于對仿真的結(jié)果進行簡要分析和比較,驗證理論依據(jù)的真實性。關(guān)鍵字:全球定位系統(tǒng);轉(zhuǎn)發(fā)式干擾;模塊化設(shè)計,仿真AbstractWiththedevelopmentofthetechnology,TheGlobalPositionSystemhasbeenusedwidely.ThenewapplicationofGPStechnologyinthemilitaryfieldishowtodestroyenemyNavigationsystemandenshroud
4、effectivelyourselvesutilizingtheGPScountertechnology.IntheGPSinterferencetechnology,theretransmittedjamminghastheadvantagesoflowsendingpower,unawarenessofthePRNcodestructureofGPSsignalandsimpleimplementation.Theretransmittedjammingprincipleisstudiedinthisdissertation.Ba
5、sedontheanalysisoftheGPSpositiontheory,theeffectofjammingprototypeisstudiedandeverypartofthejammingprototypeisanalyzed.Thedesignandimplementationofjammingprototypehavebeendonetoo.Theretransmittedjammingmethodmainlymakesuseofsignal’snaturaldelay,sothejammingsignaliscompl
6、etelythesameasnavigatingsignal,exceptforthedifferentlydelaytime.Besides,thepowerofretransmittedjammingsignalisgreaterthanthenavigationsignal,SOGPSreceiverwillprobablyreceivethejammingsignal,whichresultsinit’sgettingthefalsepseudorangeandnotbeingpositionprecisely.Atthefi
7、rstandthesecondchapter,InotonlyexplainthedevelopmenthistoryandthedevelopingsituationofGPSindetail,butalsoestimateroughlyitsdevelopmentdirection,inaddition,thebasiccomponentsofGPSissimplysummarized.Atthethirdchapter,themaincontentisthatthefunctionofjammingprototypeisthem
8、odularizationdesigned.Thewholemoduleisdividedintothreepartsincludingsignal-receivingunit,jammingsignalgenerati