基于MATLAB的MPSK性能分析【摘要】通信系统中的数字调制技术是通信与信息系统领域的基础知识，而相移键控(MPSK)信号是作为常见的数字通信调制信号。目前，它已被广泛应用，不管是在传统的通信系统，还是移动通信系统或卫星通信系统。这些都是因为它的功率和频谱效率高的优点。因此对相移键控信号的调制解调原理的掌握有助于加深对调制技术的理解，并对深入学习新型的调制技术有指导作用。本文首先介绍数字通信系统的组成，然后分析数字调制系统中的几种基本调制解调方法，主要包括MPSK和MDPSK。最后运用MATLAB软件对MPSK和MDPSK进行仿真和分析，其中主要是通过仿真得到信噪比与误码率之间的曲线，然后对加性高斯白噪声环境下的性能进行分析，并与理论值相比较。最后，还对MPSK与MDPSK在实际情况下的误码率进行了比较和分析。【关键词】数字调制，MPSK，MDPSK，误码率，信噪比基于MATLAB的MPSK性能分析MPSKPerformanceAnalysisBasedOnMATLAB【Abstract】Digitalmodulationtechnologyincommunicationsystemisbasicknowledgeinthefieldofcommunicationandinformationsystems,andphase-shiftkeying(MPSK)signalsareascommondigitalmodulationsignals.Duetoitshighpowerandspectrumutilization,MPSKhavebeenwidelyusedintraditionalcommunications,mobilecommunicationsandsatellitecommunicationssystems.Graspofthephase-shiftkeyingsignalmodulationanddemodulationprinciplewillhelptodeepentheunderstandingofmodulationtechniques,anditplayaguidingrolein-depthstudyofanewtypeofmodulationtechnique.Thispaperfirstdescribesthecompositionofthedigitalcommunicationsystem,andthenanalyzesseveralbasicdigitalmodulationsystems,mainlyincludesMPSKandMDPSK.Atlast,usingtheMATLABsoftwaretosimulateandanalyzetheMPSKandMDPSK.Throughthesimulation,wegetthecurvebetweensignal-to-noiseratioandtheerrorrate.ThenanalyzestheperformanceundertheGaussianwhitenoiseenvironment,andcompareswiththetheory.Finally,alsohascarriedonthecomparisonandtheanalysistoMPSKandMDPSKintheactualsituationerrorrate.【Keywords】Digitalmodulation,MPSK,MDPSK,errorrate,signal-to-noiseratioII基于MATLAB的MPSK性能分析目录第一章绪论.................................................................11.1课题背景...............................................................11.2调制技术的发展和趋势...................................................11.3课题研究的意义.........................................................21.4本文内容安排...........................................................3第二章数字相位调制.........................................................42.1数字通信系统的组成及说明...............................................42.2多进制相移键控.........................................................52.2.12PSK调制解调.......................................................52.2.24PSK调制解调.......................................................72.2.38PSK调制解调.......................................................92.3多进制差分相移键控....................................................112.3.12DPSK调制解调.....................................................122.3.24DPSK调制解调.....................................................132.3.38DPSK调制解调.....................................................16第三章多进制数字相位调制仿真..............................................183.1蒙特卡洛仿真的简单介绍................................................183.2多进制数字相位调制性能仿真原理........................................193.3MPSK系统仿真方法.....................................................203.3.1部件仿真原理......................
