MIMO系统信道容量分析

[键入文字]-I-摘要当今时代移动通信越来越离不开人们的生活，但是目前移动通信技术发展遇到了瓶颈。有限的频率资源和日益增长的用户需求成为移动通信技术中最主要的矛盾。在未来的移动通信发展中,如何有效大幅度提高无线链路的数据传输速率成为充满挑战性的关键问题。MIMO技术能在不增加传输信道带宽的前提下使得整个系统容量呈线性增长,这使得该技术成为了现代无线通信中的必选技术之一。MIMO技术是无线通信中实现了高速率数据传输、改善传输质量、提高系统容量的重要途径。MIMO技术彻底打破传统的无线通信模式，它要求系统使用多根发射和接收天线同时地发射和接收数据，使得无线通信系统结构、分析方法、调制、编码、信道估计、检测和多址方式等各个方面面临挑战。本文在国内外相关研究工作的基础上，针对MIMO信道容量理论进行深入研究。本文综述了MIMO技术信道容量的分析并进行了合理的MIMO信道仿真,并总结了现代无线信道传输的特点，包括无线信道的传播方式、衰落特性。在此基础上，对MIMO系统信道相关性问题进行详细描述了并进行了合理的分析。【关键词】MIMO无线信道信道容量信道仿真相关性[键入文字]-II-ABSTRACTInmoderntimesmobilecommunicationhasbecomemoreandmoreinseparablefromthepeople'slife,butthemobilecommunicationtechnologydevelopmentencounteredbottleneck.Limitedfrequencyresource,andtheincreasinguserdemandbecomethemaincontradictioninthemobilecommunicationtechnology.Inthedevelopmentoffuturemobilecommunication,howtoeffectivelyraisethedatatransferrateofthewirelesslinkbecomesthekeyissueinthechallenging.MIMOtechnologycanwithoutanyincreaseinthetransmissionchannelbandwidthislineargrowthunderthepremiseofmakingthewholesystemcapacity,whichmakesthetechnologybecomeoneofthechoiceofthemodernwirelesscommunicationtechnology.MIMOtechnologyisrealizedthehighspeeddatatransmissioninwirelesscommunication,improvethetransmissionqualityandimportantwaytoincreasethesystemcapacity.MIMOtechnologythoroughlybreaksthemodeoftraditionalwirelesscommunications,sinceitrequiresmultipletransmitandreceiveantennastosimultaneouslytransmitandreceivedatainformationinthesametime,whichchallengesalltheaspectsofwirelesscommunicationsincludingsystemarchitecture,analyticalmethods,modulation,coding,detection,channelestimation,multipleaccess,andsoon.Onthebasiscurrentresearchworks,thispaperinvestigatesMIMOchannelcapacity.ThispaperreviewsthetechnologyofMIMOchannelcapacityanalysisandreasonablesimulationofMIMOchannelandsummarizesthecharacteristicsofmodernwirelesschanneltransmission,includingthemodeoftransmission,fadingcharacteristicsofwireless.Onthisbasis,thechannelcorrelationproblemofMIMOsystemaredescribedindetailandanalyzedreasonably.【keywords】MIMOWirelesschannelChannelcapacityCorrelationChannelsimulation[键入文字]-III-目录前言...................................................................................................................................1第一章MIMO技术概述...................................................................................................3第一节MIMO系统发展概述....................................................................................3一、MIMO技术研究背景............................................................................................3二、MIMO应用前景....................................................................................................3三、MIMO技术发展存在的问题................................................................................4第二节MIMO技术简介............................................................................................6本章小结........................................................................................................................7第二章无线信道传播的基本特征...................................................................................8第一节无线信道传播特点........................................................................................8一、无线信道传播方式................................................................................................8二、无线信道传播扩展方式........................................................................................9第二节无线衰落信道的基本特征..........................................................................11一、大尺度衰落特性..................................................................................................11二、小尺度衰落特性..................................................................................................12第三节两种典型的无线衰落信道..........................................................................13一、瑞利衰落信道......................................................................................................13二、莱斯衰落信道......................................................................................................14本章小结......................................................................................................................16第三章MIMO系统的容量.............................................................................................17第一节MIMO信道建模的概述................................................................................17第二节恒参信道条件下的MIMO信道容量分析.................................................17第三节信道容量的仿真结果比较..........................................................................21本章小结......................................................................................................................23第四章MIMO信道的相关性研究.................................................................................24第一节MIMO系统相关性的概述..........................................................................24第二节MIMO相关信道模型....................................................................................27第三节相关信道下容量的分析..............................................................................28本章小结.