基于MATLAB的MSK系统原理仿真分析

分类号—————————————————————————————————密级UDC本科毕业论文基于MATLAB的MSK系统原理仿真分析学生姓名丁小龙学号020252007005指导教师孙华明老师院、系、中心信息科学与工程学院电子系专业年级2007级电子信息工程论文答辩日期年月日中国海洋大学基于MATLAB的MSK系统原理仿真分析摘要当今社会已经步入了信息时代，在各种信息技术中，信息的传输和通信起着支撑作用。对于信息的传输，数字通信已成为重要的手段。信号的调制方式也由模拟方式持续广泛地向数字方式转换，于是，数字调制就成了人们研究的重点，常用的数字调制有：移幅键控(ASK)调制、移频键控(FSK)调制和移相键控(PSK)调制。最小移频键控(MSK)是移频键控(FSK)的一种改进型,MSK调制是一种性能比较优良的新颖的数字调制，它以独特的性能吸引着工程设计人员，正在不断地被应用于各类通信系统中，成为非线性数字无线电通信系统使用的最有效的调制方式之一。本文采用理论研究和实验分析相结合的方法，系统介绍MSK调制解调原理及其特点，并通过使用Matlab的Simulink仿真模块对其进行仿真，同时简介MSK调制解调的应用及研究发展前景。关键词：MSK；MATLAB；Simulink;仿真分析；调制解调MATLAB-basedsimulationofMSKSystemPrincipleAbstractToday'ssocietyhasenteredtheinformationage,inavarietyofinformationtechnology,informationtransmissionandcommunicationplaysasupportingrole.Forinformationtransmission,digitalcommunicationhasbecomeanimportanttool.Signalfromtheanalogmodulationisalsocontinuedwidespreadconversiontodigitalform,therefore,digitalmodulationhasbecomeonefocusofthestudy,thecommonlyuseddigitalmodulationare:amplitudeshiftkeying(ASK)modulation,frequencyshiftkeying(FSK)Modulationandphaseshiftkeying(PSK)modulation.Minimumfrequencyshiftkeying(MSK)isafrequencyshiftkeying(FSK)foranimproved,MSKmodulationisarelativelygoodperformanceofthenoveldigitalmodulation,itisattractedtotheuniquepropertiesofengineeringstaff,isconstantlyBeappliedtovarioustypesofcommunicationsystems,anonlineardigitalradiocommunicationsystemusingoneofthemostefficientmodulation.Inthispaper,usingtheoreticalandexperimentalanalysisofacombinationmethod,thesystemintroducestheprincipleandcharacteristicsofMSKmodulationanddemodulation,andMATLABbyusingitstimedomainandfrequencydomainsimulation,andbyusingMatlab'sSimulinksimulationmoduletosimulatethem,alongwithabriefdescriptionofMSKmodulationanddemodulationapplicationcaseandprospects.KeyWords:MSK；MATLAB；Simulink;SimulationAnalysis;ModulationandDemodulation目录1绪论.....................................................................................................11.1概述......................................................................................................................11.2数字调制方式的发展状况................................................................................11.3论文的内容和意义.............................................................................................31.3.1论文的内容..............................................................................................31.3.2论文的意义............................................................................................32MSK理论研究.................................................................................................................42.1MSK基本原理和特点........................................................................................................42.1.1MSK的基本原理.........................................................................................................42.1.2MSK的特点..................................................................................................................72.2MSK调制原理...........................................................................................................................92.2.1MSK的正交表示.........................................................................................................92.2.2MSK正交调制...............................................................................................102.3MSK解调原理............................................................................................................133MATLAB基础理论.....................................................................................................163.1MATLAB简介.............................................................................................................163.2MATLAB的特点及优势...........................................................................................173.3Simulink简介.........................................................................................................183.4MATLAB在通信系统仿真中的应用....................................................................193.4.1通信仿真的概念...................................................................................193.4.2通信仿真的一般步骤...........................................................................194基于MATLAB的MSK系统原理仿真.......................................................224.1MSK系统仿真模型...................................................................................................224.2MSK系统仿真模块中的参数设置.......................................................................234.3仿真结果及相应的分析..................................................................................264.3.1误码率分析.............................................................................................264.3.2MSK功率谱密度分析..................................................................................274.3.3MSK系统眼图分析......................................................................................284.3.4MSK系统星座图分析..................................................................................295总结与展望.......................