南京工程学院毕业设计说明书(论文)作者:林森学号:240092414系部:康尼学院专业:通信工程(计算机通信)题目:无线协作系统的仿真与性能分析(协作策略)指导者:杨洁讲师评阅者:2013年6月南京WirelessCooperativeCommunicationsystemsimulationandperformanceanalysisADissertationSubmittedtoNanjingInstituteofTechnologyFortheAcademicDegreeofBachelorofScienceBySenLinSupervisedbyLecturerJieYangCollegeofCommunicationEngineeringNanjingInstituteofTechnologyJune2013摘要为了满足人们对无线多媒体通信业务不断增长的需要,协作通信技术应运而生。本文研究了无线协作通信中的部分协作策略。其中比较主流的是放大转发(AF)和解码转发(DF)。本文首先分析了不同协作策略的工作原理,然后利用MATLAB来仿真了不同信噪比下AF和DF协作通信系统的误码率性能。从仿真结果可以对以下一些问题进行判断:在不同信道条件下,AF、DF和传统的直连方式相比优势在哪里,缺点在哪里。通过比较相同的信噪比条件下不同传输方式的误比特率以及功耗等参数可以判断一种无线通信方式的优劣,而这次研究,就是要运用MATLAB软件,来完成对不同协作策略以及不使用协作情况下的通信效果的仿真,从而得以判断不同通信方式的好坏,加深对自身专业的了解。本文的研究成果,可以为无线通信系统的建模和设计提供理论依据。本论文的主要内容包括:无线协作通信原理;协作通信中不同协作策略;MATLAB仿真流程,用MATLLAB编程实现无线协作通信系统仿真。关键词:协作通信;放大转发;解码重传;误码率AbstractInordertosatisfypeople'sgrowingwirelessmultimediacommunicationserviceneeds,collaboration,communicationtechnologyemerged.Thispaperstudiesthewirelesscooperativecommunicationscollaborationstrategy.Whichisamplifiedmoremainstreamforwarding(AF)anddecodeforward(DF).Thispaperanalyzesthedifferentcollaborationstrategyworks,thenuseMATLABtosimulatetheamountofdifferentSNRAFandDFcooperativecommunicationsystemBERperformance.Fromthesimulationresultscanbeseen:istocomparedifferentchannelconditions,AF,DF,andcomparedtothetraditionalstraightedgewhereshortcomingswherethesameSNRdifferenttransmissionbiterrorrateandpowerconsumptionandotherparameterstojudgethemeritsofawirelesscommunicationsystemthemajorparametersofthisstudyistouseMATLABsoftwaretocompletecollaborativestrategiesfordifferentcircumstancesandwithoutthecollaborationofthecommunicationresultsofthesimulation,sothatitcandeterminethedifferentcommunicationgoodorbadwaytodeepentheirprofessionalknowledge.Theresearchresultscanprovideawirelesscommunicationsystemmodelinganddesignprovideatheoreticalbasis.Themaincontentsofthispaperinclude:wirelesscooperativecommunicationtheory;collaborativecommunicationindifferentcollaborationstrategy;MATLABsimulationprocesses,McollaborationwithMATLLABprogrammingwirelesscommunicationsystemsimulation.Keywords:CooperativeCommunicationAFDFBER目录第一章绪论.........................................................11.1选题背景与意义...............................................11.2研究现状.....................................................11.3论文主要研究内容...........................................2第二章协作通信概述.................................................42.1协作通信系统模型............................................42.2几种中继方式简介.............................................52.2.1固定放大转发协议简介...................................62.2.2固定解码转发协议简介...................................72.2.3几种其他的协作策略.....................................82.3几种合并方式概述............................................92.4分集增益........