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摘要现代通信系统要求通信距离远，通信容量大、传输质量好。作为其关键技术之一的调制解调技术一直是人们研究的一个重要方向。从最早的模拟调幅调频技术的日趋完善，到现在数字调制技术的广泛应用。使得信息的传输更为有效和可靠。二进制数字振幅键控是一种古老的调制方式，也是各种数字调制的基础。本毕业设计主要是利用SystemView仿真软件平台，设计一个2ASK调制解调器系统，用示波器观察调制前后的信号波形，并将其记录下来，分析该系统的性能。通过SystemView的仿真功能模拟实际中的2ASK调制解调。本课题研究的是基于SystemView的2ASK调制解调器设计。文中将调制解调器分成调制与解调两个部分进行设计，对调制、解调的两种方法进行简单的介绍，进而对比，选择出合适的方法完成设计。关键词SystemView，调制，解调，2ASKAbstractThemoderncommunicationsystemrequirementsforcommunicationdistance,communicationcapacity,transmissionquality.Asoneofitskeytechnologiesofmodulationanddemodulationtechniquesisanimportantdirectionforresearchers.FromtheearliestanalogAMFMtechnologyismaturingtotheextensiveapplicationofdigitalmodulationtechniques.Makingtransportmoreeffectiveandreliableinformation.Binarydigitalamplitudeshiftkeyingisanancientwayofmodulation,thebasisofavarietyofdigitalmodulation.ThisgraduationsystemViewsimulationsoftwareplatformdesigneda2ASKmodemsystem,usetheoscilloscopebeforeandaftertheobservedmodulationsignalwaveform,andrecordandanalyzetheperformanceofthesystem.Bysystemviewsimulationof2ASKmodulationanddemodulationOfthisresearchprojectisbasedontheSystemView2ASKmodemdesign.Paper,themodemisdividedintotwopartsofthemodulationanddemodulationdesign,abriefintroductiononthetwomethodsofmodulation,demodulation,andthencontrast,choosetheappropriatemethodtocompletethedesign.KeywordsSystemView；Modulation；Demodulation；2ASK目录摘要..............................................................................................................................................IAbstract..........................................................................................................................................II第1章绪论.............................................................................................................................01.1通信系统一般模型............................................................................................................01.2通信系统的分类与通信方式............................................................................................1第2章SystemView的应用.......................................................................................................22.1SystemView的应用..........................................................................................................22.2SystemView的操作..........................................................................................................22.3SystemView的特点..........................................................................................................22.4SystemView的功能..........................................................................................................32.5SystemView的基本使用..................................................................................................42.6SystemView的系统定时窗口..........................................................................................4第3章2ASK调制解调的基本原理..........................................................................................53.12ASK的定义.....................................................................................................................53.22ASK的调制.....................................................................................................................53.22ASK的解调.....................................................................................................................6第4章基于SystemView的调制解调系统设计......................................................................84.12ASK信号调制.................................................................................................................84.1.1信号调制仿真图..........................................................................................................84.22ASK信号解调.................................................................................................................84.2.1信号解调仿真图..........................................................................................................94.32ASK信号调制解调的功能模板分析.............................................................................94.3.1功能介绍....................................................................................................................104.4测试过程及结果..............................................................................................................12设计总结.......................................................................................................................................16致谢...........................................................................................................................................17参考文献.......................................................................................................................................18附录...............................................................................................................................................19第1章绪论如今社会通信技术的发展速度可谓日新月异，计算机的出现在现代通信技术的各种媒体中占有独特的地位，计算机在当今社会的众多领域里不仅为各种信息处理设备被使用，而且它与通信向结合，使电信业务更加丰富。随着人类经济和文化的发展，人们对通信技术性能的需求也越来越迫切，从而又打打推动了通信科学的