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1、哈爾濱理工大學(xué)學(xué)士學(xué)位論文MIMO信道空時編碼技術(shù)的研究摘要 未來的無線通信系統(tǒng)的目標(biāo)是實(shí)現(xiàn)無所不在的、高速、可靠的移動多媒體傳輸。由多發(fā)射和多接收天線組成的多輸入多輸出MIMO（Multiple-InputMultiple-Output）技術(shù)正是在不犧牲發(fā)射功率和信號帶寬的條件下，達(dá)到這一目標(biāo)的有效技術(shù)之一。MIMO技術(shù)在無線通信鏈路兩端均使用多個天線，可以充分利用無線傳播中的多徑傳輸，使頻譜利用率和鏈路可靠性得到極大的提高。與MIMO技術(shù)緊密相關(guān)的就是空時編碼，本文介紹常見的三種空時編碼技術(shù)：分層空時碼、空時網(wǎng)格碼和分組空時碼的性能和復(fù)雜度，最后對三種編碼方案
2、的優(yōu)缺點(diǎn)進(jìn)行總結(jié)比較。本文首先對無線MIMO系統(tǒng)的信道模型、信道容量兩個主要方面涉及到的有關(guān)理論進(jìn)行了分析；然后研究和介紹分層空時碼、空時網(wǎng)格碼和分組空時碼和的原理和編碼方法，及其對MIMO信道改善情況，并且比較各種編碼方法各方面的優(yōu)缺點(diǎn)；最后在瑞利衰落MIMO信道下，對三種編碼：空時分層碼、空時網(wǎng)格碼和空時分組碼進(jìn)行MATLAB仿真與分析，并給出了有關(guān)仿真結(jié)果。關(guān)鍵詞 MIMO；空時編碼；分層空時碼；空時網(wǎng)格碼；分組空時碼-III-哈爾濱理工大學(xué)學(xué)士學(xué)位論文TheResearchonMIMOChannelSpace-timeCodingTechnologyAbst
3、ractThefuturebreadbandwirelesscommunicationsystemsareexpectedtoprovideubiquitous,high-reliability,andhigh-data-ratsmobilemultimediatransmission.MIMO（Multiple-InputMultiple-Output）techniqueutilizingmultipleantennastorealizemultipletransmissionsandmultiplereceivingcanexploitspaceresource
4、adequatelyandcanimprovechannelcapacitywithoutanylossinbandwidthandtransmittingpower.Soitcanmeettheneedofhighdatatransmissioninfuturewirelesscommunications,closelyassociatedwithMIMOtechnologyisspace-timecoding.Thepaperintroducesprincipleofthreekindsofcommonspace-timecodingoftechnology,i
5、ntroducesemphaticallythespace-timecodes,layeredgridspace-timecode,groupingspace-timecodethreecommonspace-timecodingschemeandcomplexity,theperformanceoftheadvantagesanddisadvantagesofthethreekindsofencodingschemeissummarized. Firstly,thewirelessMIMOsystem,channelmodels,channelcapacityi
6、nvolvestwomainaspectsofthetheoryareanalyzed;researchandintroducethelayeredspace-timecodes,space-timetrelliscodesandspacetimeblockcodesandtheprinciplesandcodingmethods,withittoMIMOchannelimprovementsituationandcompareadvantagesanddisadvantagesofvariousaspectsofcoding;Finally,intheRaylei
7、ghfadingMIMOchannel,IcarryontheMATLABsimulationandanalysisforthethreecodes:layeredspace-timecodes,space-timetrelliscodesandspace-timeblockcodes,andgivethesimulationresults.-III-哈爾濱理工大學(xué)學(xué)士學(xué)位論文Keywords MIMO;Space-TimeCoding;Space-TimeTrellisCoding;Space-TimeBlockCodes;LayeredSpace-TimeC
