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1、西安電子科技大學碩士學位論文MIMO多天線技術研究姓名：李瑋申請學位級別：碩士專業(yè)：通信與信息系統(tǒng)指導教師：李波;楊家瑋20080101捅要雖然第三代移動通信技術還沒有應用到實際生活之中，但是新一代無線通信技術已撲面而來，其無所不在、高質(zhì)量、高速率的移動多媒體傳輸目標讓人耳目一新。然而，實現(xiàn)這一振奮人心的通信目標并非易事，常規(guī)單天線收發(fā)通信系統(tǒng)面臨嚴峻挑戰(zhàn)，采用常規(guī)分集技術或智能天線技術己不足以解決新一代無線通信系統(tǒng)的大容量與高可靠性需求問題。此時，多天線的無線通信技術為我們提供了解決該問題的新途徑，它在無線
2、鏈路兩端均采用多天線，能夠充分開發(fā)空間資源，在無需增加頻譜資源和發(fā)射功率的情況下，成倍地提升通信系統(tǒng)的容量與可靠性。本文首先介紹了MIMO通信技術的相關背景及其信道模型，并對幾種天線配置下的信道容量進行了仿真分析；然后引入了空時編碼的介紹，同時對基于垂直分層編碼的四種檢測算法進行了性能比較，利用這些檢測算法的仿真結(jié)果，分析在不同天線配置下算法的可靠性。關鍵詞：MIMO信道容量垂直分層編碼檢測算法仿真AbstractThemirdgenerationmobilecommunication(30)technolo
3、百esarcstillnotappliedintoourlife．However,thenewgenerationwirelesscommunicationtechnologiesareemergingandbooming,whosetargetofprovidingubiquitous，hi911quality,andhighdataratemobilemultimediatransmissionsoundsmuchattractive．Ofcoursc,theimplementationofthisunp
4、recedentedtargetisnotsoeasy,andthetraditionalcommunicationsystemsusingsingle·antennatransmittingandreceivingarcconfrontedwithastiffchallengetoachievethistarget．Thedemandsofbothhighcapacityandhighreliabilityinthenewgenerationwirelesscommunicationsystemsareno
5、tenoughtobemeteventhoughoneofthetraditionalimprovedmeasures，suchasthetraditionaltransmitdiversity,receivediversityandsmartantennatechnology,isused．Fortunately,thecreativetechnology,namelyMultiple-InputMultiple-Output(MIMO)，hasprovidedanovelsolutiontothispro
6、blem．MIMOmethodsmakeuseofmultiple—antennaatboththetransmitandthereceivesideoftheradiolinktomultiplythecapacityandreliabilityovermoletraditionalwirelesscommunicationsystemsbyfullyexploringthespaceresourcewithinthesamefrequencybandatnoadditionalpowerexpenditu
7、re．However,manymoreproblemsareemergingandurgentlywantedtobesolvedinMIMOcommunicationsystemsduetointroducingthemultiple—antennacomparingwiththetraditionalsingle-antennasystems．Inthispaper,theMIMOsystemmodelandknowledgerelatedwasintroducedfirstly．Weanalyzedth
8、ecapacityofMIMOchannelindifferentcases．ThentheSpace-TimeCodingwasintroduced，simultaneitywccomparedwiththeperformanceoffourdetectingarithmeticandanalyzedthereliabilityofsystemindifferentantcnnastation．K
