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ID:33744326
大小:1.18 MB
页数:48页
时间:2019-02-28
《mimo高频段信道空间相关特性与阵列方向关系分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、哈尔滨工业大学工学硕士学位论文AbstractThedemandformobilecommunicationservicegrowseverydaywiththecommerciallaunchof3Gmobilecommunicationsystems.Therefore,theMIMOcommunicationtechnologyachievedhigh-speeddatacommunicationshasbecomeanimportantsupportformobilecommunicationstechnologyinfuture.MIMOwireles
2、schannelcaneffectivelycombatthedeclineandenhancethereliabilityofwirelesscommunicationbyuseingofspatialdiversitytechniques;MIMOsystemsalsocanimprovewirelesschannelcapacityandenhancetheeffectivenessofwirelesscommunicationsbyusingspatialmultiplexing.Thewirelesscommunicationsbusinessprim
3、arilyhappenedatthelowfrequencyband.withthegrowingofthisbusiness,low-frequencypeakbecomesmoreandmorecrowded,anditcannotmeetdemandforhigh-speeddatatransmission.Becauseofthis,peoplehavetoturnattentiontohighfrequencyMIMOchannels.Comparedwiththelowfrequencychannel,thehighfrequencychannelc
4、anprovideawiderbandwidthandlessinterference.Becauseofthewavelengthbecomesshorterthanlowfrequency,highfrequencyhassmallerantennasize,soitcanmaketheMIMOsystemperformancebeimproved.MIMOsystemperformanceconstrainedbyspace-relatedfeatures.Thespatialcorrelationpropertiesdirectlydetermineth
5、echannelcapacityanddiversitygain.Inthisdisseration,thespatialcorrelationcharacteristicsofthehigh-frequencybroadbandMIMOchannelwouldbein-depthstudybytheoreticalanalysisandactualmeasurement,andespeciallyfocusedontherealationshipbetweenthedirectionoftheantenna-arrayandthespacecorrelatio
6、ncharacteristics.ThisthesisfirstbrieflydescribestheMIMOtechnologyanditsdevelopment.MIMOsystemtakesadvantageofmultipathtoimprovetheirsystemperformance.Wirelesschannelcharacteristicsvarywithfrequency,becauseofthatMIMOsystemsathighfrequencyshowdifferentcharacteristicswith2.45GHzinthecha
7、nnelfadingcharacteristics,especiallytherelatedtotheantennacharacteristicsareverydifferentThespatialcorrelationpropertieshasgreatinfluencetotheMIMOsystems,duringthetheoreticalanalysiscouldbefoundthat,thespatialcorrelationoftheantennacanbeexpressedbyafunctionofspaceintervalextracted.Th
8、espatialcorr
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