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贵州民族大学本科毕业论文IPN码序列发生器的FPGA设计与实现刘小宇摘要：PN码（伪噪声码）广泛应用于测量、雷达导航、GPS、扩频通信系统和加密系统等领域。在理论研究上已经相对成熟，在实际工程应用中也有若干种产生方法，其中最为基本也是应用得最多的就是利用线性反馈移位寄存器的方式来产生。本文在对大量成功案例和资料的研究上，对前人的成果加以改进创新，最后得出了一套产生PN码的的可行性方案，并利用大规模可编程逻辑器件FPGA设计实现。可作为需要频繁更换PN序列设计方案的参考。本论文介绍了PN序列的国内外发展现状，应用范围，采用FPGA、QuartusII9.1、Modelsim、逻辑分析仪等工具软件进行设计、验证、实现，并对所产生序列进行理论分析；最后说明了PN序列在CDMA系统中的应用并对所做工作及研究进行总结及后期展望。关键词：PN码线性反馈移位寄存器中央控制器FPGACDMA作者：刘小宇（计算机与信息工程学院）专业：光信息科学与技术指导老师：陈楠IIPNcodesequencerdesignandrealizebasedonFPGALiuXiaoYuAbstract:PNcode(pseudonoisecode)researchinthe1940sbegan,widelyusedinradarmeasurement,nav-igation,GPS,spreadspectrumcommunicationsystemandencryptionsystem,etc.Inthetheoreticalresearchhasbeenrelativelymature,inthepracticalengineeringapplicationinanumberofgenerationmethod,oneofthemostbasicalsoapplicationiswhatmostofthelinearfeedbackshiftregisterwaytoproduce.Thispaperonalotofsuccessfulcasesandmaterialresearch,thisarticleresultstotheintoinnovation,finallycometoasetofPNcodegeneratedthefeasibilityoftheproject,andmakeuseoflarge-scaleprogrammablelogicdevicesFPG-Adesignandimplementation.ButastheneedforfrequentchangeofPNsequencedesignreference.Thewholesystemcanbedividedintothreeparts:keysignalinput;Digitalpipeseriesdisplay;Presetthesequence'slength,feedbackcoefficient,theinitialvalueofNlevelshiftregisterandtheperipherallogiccircuit.AmongthemwithNlevelshiftregisterandthecentralcontrollerforthecoreofthesystem.ThispaperfirstlyintroducesthedevelopingsituationofdomesticandforeignPNsequence,thescopeofapplication,andpaperwritingthought;SecondthroughtothetheoreticalbasisofPNsequencearediscussedindetail;Atlastthispaperthedesignoftwoschemeanddesignideasadetailedanalysisofthediscussion,unti-matelybasedonFPGA,QuartusII9.1,Modelsim,thelogicalanalyzertoolssuchassoftwaredesign,verificati-on,implementation,andproducedsequenceoftheoreticalanalysis;IntheendofthearticleinshortlengthPNsequenceinthatsystem,theapplicationofCDMAandtheirworkandresearchreviewandlaterprospect.keyword:PNcodeLinearFeedbackShiftRegistercentralcontrollerFPGACDMA贵州民族大学本科毕业论文III目录摘要............................................................................................................................................IAbstract......................................................................................................................................II目录......................................................................................................................................III第1章绪论..............................................................................................................................11.1课题的研究背景及意义......................................................................................................11.2PN码国内外研究概述.........................................................................................................11.2.1PN序列的发展现状...................................................................................................................11.2.2PN序列的定义及特点...............................................................................................................21.3本课题的主要研究内容.......................................................................................................3第2章理论研究......................................................................................................................42.1m序列的定义........................................................................................................................................42.1.1递推方程.....................................................................................................................................42.1.2特征方程.....................................................................................................................................52.1.3母函数.........................................................................................................................................52.1.4本源多项式的确定....................................................................................................................52.2m序列的性质........................................................................................................................................62.2.1m序列的随机特性..................................................................................................................62.2.2m序列的自相关特性..............................................................................................................72.2.3功率谱密度................................................................................................................................82.4本章小结...............................................................................................................................................8第3章大规模可编程逻辑器件（FPGA）简介.......................................................................93.1可编程逻辑器件设计技术简介............................................................................................................93.1.2可编程逻辑器件发展史................................................