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河北北方学院毕业论文题目：第三代移动通信系统中的软件无线电技术研究姓名：史立云院系：河北北方学院宣化教学部专业：电子信息工程年级：2005级学号：2005540025指导教师：杨磊河北北方学院教务处制目录摘要...............................................................................................................................................1ABSTRACT...................................................................................................................................2引言.............................................................................................................................................3第1章软件无线电概述...............................................................................................................41.1软件无线电技术产生的历史背景......................................................................................41.2软件无线电的发展历史......................................................................................................41.3软件无线电的主要内容......................................................................................................51.3.1软件无线电的定义......................................................................................................51.3.2软件无线电的体系结构..............................................................................................61.3.3软件无线电的特点......................................................................................................6第2章软件无线电的关键技术................................................................................................102.1多波束智能天线................................................................................................................112.2RF转换技术......................................................................................................................122.3A/D/A模数转换技术.........................................................................................................122.4数字中频处理....................................................................................................................132.4.5基带和比特流数字信号处理........................................................................................14第3章软件无线电在第三代移动通信系统中的应用............................................................153.1第三代移动通信系统的特点..........................................................................................153.2第三代移动通信对软件无线电技术的需求..................................................................153.3软件无线电在第三代移动通信中的应用........................................................................163.3.1软件无线电技术与第三代移动通信系统的融合.....................................................163.3.2软件无线电在SCDMA中的应用................................................................................17第4章第三代移动通信中的软件无线电技术的新进展........................................................194.1体系结构分层化与软件模块化........................................................................................194.2软件无线电结构数学分析化............................................................................................204.3面向对象化........................................................................................................................214.4认知化、智能化................................................................................................................224.5计算机化............................................................................................................................234.6网络化、信息安全化........................................................................................................24第5章结束语.............................................................................................................................25致谢.........................................................................................................................................26参考文献.......................................................................................................................................27-1-摘要软件无线电是最近几年提出的一种实现无线电通信的体系结构，是继模拟到数字、固定到移动之后，无线通信领域的又一次重大突破，是一种全新的无线电技术，它已与第三代移动通信系统紧密的结合起来。第三代移动通信系统研究推动了软件无线电技术的发展，而软件无线电技术又促使第三代移动通信系统更加灵活的实现。论文介绍了软件无线电的产生背景、概念、特点、关键技术、发展趋势及其在第三代移动通信中的应用，重点对软件无线电的关键技术及其在第三代移动通信中的应用作了详细分析，同时归纳总结了由于第三代移动通信系统的推动作用，软件无线电系统呈现出的一些新的发展趋势。关键词：软件无线电；第三代移动通信；智能天线；射频转换技术；A/D/A模数转换技术；数字中频处理；基带；比特流数字信号处理；认知化；智能化-2-ABSTRACTSoftwareradioisputforwardinrecentyearsasaradiocommunicationsystemtoachievethestructure.Itisasecondmajorbreakthroughafterwardsanalogtodigita,fixedtomobile,whichisanewradiotechnologyinwirelessofcommunicationsarea,andhasbeenwiththefirstthird-generationmobilecommunicationsystemsclosertogether.Theresearchofthethirdgenerationmobilecommunicationsystemhaspromotedthedevelopmentofsoftwareradiotechnology,whilethesoftwareradiotechnologybringaboutthethirdgenerationmobilecommunicationsystemsmoreflexible．Thisthesisintroducesthebackgroundofsoftwareradio’semergence,theconcept,characteristics,keytechnologyanditsapplicationsinthethirdgenerationmobilecommunication.Thekeytothesoftwareradiotechnologyanditsdevelopmentdirectionhasbeenmadeemphaticalanalysisinthethesis.Finally,thenewtrend,thesoftwareradiosystemwillshow,hassummedupinthethe