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本科生毕业设计基于Simulink的QAM调制解调实现独创性声明本人郑重声明:所呈交的毕业论文(设计)是本人在指导老师指导下取得的研究成果。除了文中特别加以注释和致谢的地方外,论文(设计)中不包含其他人已经发表或撰写的研究成果。与本研究成果相关的所有人所做出的任何贡献均已在论文(设计)中作了明确的说明并表示了谢意。签名:年月日授权声明本人完全了解许昌学院有关保留、使用本科生毕业论文(设计)的规定,即:有权保留并向国家有关部门或机构送交毕业论文(设计)的复印件和磁盘,允许毕业论文(设计)被查阅和借阅。本人授权许昌学院可以将毕业论文(设计)的全部或部分内容编入有关数据库进行检索,可以采用影印、缩印或扫描等复制手段保存、汇编论文(设计)。本人论文(设计)中有原创性数据需要保密的部分为(如没有,请填写“无”):签名:年月日指导教师签名:年月日摘要本文设计的是基于Simulink的QAM调制解调的实现。首先介绍了QAM调制解调系统的基本原理,然后介绍了仿真软件Simulink下系统建模与仿真的基本操作,重点是对16QAM系统各个模块进行建模与仿真,实现了16QAM的调制与解调。最后做了一个2DPSK系统仿真,将它与16QAM系统进行比较,得出16QAM是一种相对优越的调制解调系统这一结论。关键字:QAM调制解调;Simulink;仿真ABSTRACTThisdesignisbasedonSimulink,QAMmodulationanddemodulationimplementation.QAMmodulationanddemodulationfirstintroducedthebasicprinciplesofthesystem,andthenintroducedtheSimulinksimulationsoftwareformodelingandsimulationofthesystem'sbasicoperations,focusedoneachmodule16QAMsystemmodelingandsimulation,toachievea16QAMmodulationanddemodulation.Finallymadea2DPSKsystemsimulation,thesystemwillcompareitwith16QAM,16QAMobtainedisarelativelysuperiormodulationanddemodulationsystemthisconclusion.Keyword:QAMmodulationanddemodulation;Simulink;Simulation目录1绪论...........................................................................................................................................11.1QMA简介及应用.................................................................................................................11.2Simulink软件与通信仿真...................................................................................................11.3论文主要内容........................................................................................................................22现代数字调制技术QAM........................................................................................................32.1QAM调制原理.....................................................................................................................32.2QAM解调原理.....................................................................................................................42.3MQAM信号星座图.............................................................................................................52.4QAM的误码率性能.............................................................................................................63QAM调制解调的实现与仿真................................................................................................83.1Simulink软件.......................................................................................................................83.1.1Simulink模块....................................................................................................................83.1.2Simulink建模与仿真........................................................................................................93.2QAM调制模块建模与仿真................................................................................................93.2.1信号源模块.......................................................................................................................103.2.2串∕并转换模块...............................................................................................................103.2.32/4电平转换模块.............................................................................................................123.2.4其余模块...........................................................................................................................143.3QAM解调模块建模与仿真...............................................................................................153.3.14/2电平判决模块.............................................................................................................163.3.2并∕串转换模块...............................................................................................................183.3.3其余模块...........................................................................................................................193.4QAM抗噪声性能研究.......................................................................................................193.516QAM与2DPSK系统抗噪声性能比较........................................................................214总结.........................................................................................................................................23参考文献.......................................................................................................................................24附录...........................................................................................................................................25致谢...........................................................................................................................................261绪论1.1QMA简介及应用在当今飞速发展的信息时代,随着数字通信技术和计算机技术的快速发展以及通信网络与计算机网络的相互融合,信息科学技术已经成为21世纪国际社会和世界经济发展的新的强大推动力。现代数字通信技术的调制方式具有三种基本方式:数字振幅调制、数字频率调制、数字相位调制,但这三种数字调制方式都存在不足之处,如:频谱利用率低、抗多径抗衰弱能力差、功率谱衰减慢、带外辐射严重等。为了改善这些不足,近几十年来人们不断提出一些新的数字调制解调技术,以适应各种通信系统的要求。其主要研究内容围绕着减小信号带宽以提高信号频谱利用率;提高功率利用率以增强抗噪声性能;适应各种随参信道以增强抗多径抗衰落能力等。正交振幅调制QAM(QuadratureAmplitudeModulation
本文标题:基于Simulink的QAM调制解调实现
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