韩 鹏 MIMO信道空时编码技术的研究

哈尔滨理工大学学士学位论文-IMIMO信道空时编码技术的研究摘要未来的无线通信系统的目标是实现无所不在的、高速、可靠的移动多媒体传输。由多发射和多接收天线组成的多输入多输出MIMO（Multiple-InputMultiple-Output）技术正是在不牺牲发射功率和信号带宽的条件下，达到这一目标的有效技术之一。MIMO技术在无线通信链路两端均使用多个天线，可以充分利用无线传播中的多径传输，使频谱利用率和链路可靠性得到极大的提高。与MIMO技术紧密相关的就是空时编码，本文介绍常见的三种空时编码技术：分层空时码、空时网格码和分组空时码的性能和复杂度，最后对三种编码方案的优缺点进行总结比较。本文首先对无线MIMO系统的信道模型、信道容量两个主要方面涉及到的有关理论进行了分析；然后研究和介绍分层空时码、空时网格码和分组空时码和的原理和编码方法，及其对MIMO信道改善情况，并且比较各种编码方法各方面的优缺点；最后在瑞利衰落MIMO信道下，对三种编码：空时分层码、空时网格码和空时分组码进行MATLAB仿真与分析，并给出了有关仿真结果。关键词MIMO；空时编码；分层空时码；空时网格码；分组空时码哈尔滨理工大学学士学位论文-IITheResearchonMIMOChannelSpace-timeCodingTechnologyAbstractThefuturebreadbandwirelesscommunicationsystemsareexpectedtoprovideubiquitous,high-reliability,andhigh-data-ratsmobilemultimediatransmission.MIMO（Multiple-InputMultiple-Output）techniqueutilizingmultipleantennastorealizemultipletransmissionsandmultiplereceivingcanexploitspaceresourceadequatelyandcanimprovechannelcapacitywithoutanylossinbandwidthandtransmittingpower.Soitcanmeettheneedofhighdatatransmissioninfuturewirelesscommunications,closelyassociatedwithMIMOtechnologyisspace-timecoding.Thepaperintroducesprincipleofthreekindsofcommonspace-timecodingoftechnology,introducesemphaticallythespace-timecodes,layeredgridspace-timecode,groupingspace-timecodethreecommonspace-timecodingschemeandcomplexity,theperformanceoftheadvantagesanddisadvantagesofthethreekindsofencodingschemeissummarized.Firstly,thewirelessMIMOsystem,channelmodels,channelcapacityinvolvestwomainaspectsofthetheoryareanalyzed;researchandintroducethelayeredspace-timecodes,space-timetrelliscodesandspacetimeblockcodesandtheprinciplesandcodingmethods,withittoMIMOchannelimprovementsituationandcompareadvantagesanddisadvantagesofvariousaspectsofcoding;Finally,intheRayleighfadingMIMOchannel,IcarryontheMATLABsimulationandanalysisforthethreecodes:layeredspace-timecodes,space-timetrelliscodesandspace-timeblockcodes,andgivethesimulationresults.哈尔滨理工大学学士学位论文-IIIKeywordsMIMO;Space-TimeCoding;Space-TimeTrellisCoding;Space-TimeBlockCodes;LayeredSpace-TimeCoding哈尔滨理工大学学士学位论文目录摘要......................................................................................................................IAbstract...............................................................................................................II第1章绪论........................................................................................................11.1课题背景...................................................................................................11.2MIMO对系统性能的改善........................................................................21.3研究现状...................................................................................................31.3.1MIMO技术的研究现状.....................................................................31.3.2空时编码技术的发展........................................................................31.4论文的主要内容与章节安排...................................................................51.4.1本文的主要内容................................................................................51.4.2本文的章节安排................................................................................5第2章MIMO空时信道模型和空时信号处理................................................62.1MIMO空时信道几何模型........................................................................62.2MIMO空时信号模型................................................................................62.3空时二维处理...........................................................................................82.3.1概述....................................................................................................82.3.2空时信号处理....................................................................................92.4本章小结.................................................................................................10第3章几种典型空时编码的比较研究..........................................................113.1空时编码技术的简介.............................................................................113.1.1空时编码的系统模型......................................................................113.2空时分层码.............................................................................................133.2.1空时分层码的概念..........................................................................133.2.2空时分层码的编码方法..................................................................133.3空时网格码.............................................................................................153.3.1空时网格码的概念..........................................................................153.3.2空时网格码的编码方法..................................................................163.4空时分组码.............................................................................................173.4.1空时分组码的概念..........................................................................173.4.2空时分组码的编码原理..................................................................183.5空时编码性能比较...............................................................................183.6本章小结....................................................