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ID:37383146
大小:4.67 MB
页数:69页
时间:2019-05-23
《基于MIMO-OFDMA的新一代无线通信网络无线资源管理机制研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、西南交通大学硕士学位论文基于MIMO/OFDMA的新一代无线通信网络无线资源管理机制研究姓名:蒋海平申请学位级别:硕士专业:通信与信息系统指导教师:邓平20080601西南交通大学硕士研究生学位论文第1I页有技术大多是从单一的物理层或媒质接入控制等层进行考虑,无法同时满足各用户的QoS需求和系统整体传输容量最大。本文采用跨层设计的思想,联合考虑物理层和媒体接入控制MAC层,提出了一种多用户多天线传输的方法,实现多用户多天线跨层优化传输。最后,进行了全文总结,并对下一步工作展望。关键词:MIMO:OFDMA:无线资源分配;QoS西南交通大学硕士研究生学位论文第1
2、II页AbstractWiththerapiddevelopmentofwirelesscommunication,interactandmultimedia,themodesofnewgenerationmobilecommunicationnetworksbecomediverse,high。speed,flexibleandhighefficient.Orthogonalfrequencydivisionmultiplexing(OFDM)andmultiple-inputmultiple—output(MIMO)havebeenacknowledged
3、astwomajorinformationtransmissionandprocessingtechniquesfornextgenerationwirelesscommunicationnetworks,thustherearemanyproblemstobefacedforradioresourcemanagement.Therefore,theschemesofradioresourcemanagementinnewgenerationwirelesscommunicationnetworksbasedonMIM0/OFDMAareresearchedi
4、nthisdissertation.·Firstly,accordingtothearchitecturesandcommunicationservicesofnewgenerationwirelesscommunicationnetworks,somenewresearchareasandstatusofradioresourcemanagementinnewgenerationwirelesscommunicationareanalyzed,including:integratedradioresourcemanagementbasedontime,fre
5、quency,spacedimensionsofMIMO/OFDM,QoSawarebasedadaptivechannelallocationtechniquesandenergyefficientintegratedschedulingtechnique.Secondly,forthecharacteristicofOFDMAtechnique,theOFDMAbasedsystemscanallocatedynamicallysubcarrierstousersintermsofthechannelqualityandQoSrequirement.Ano
6、velalgorithmisproposedwhichcanguaranteeusers’QoSrequirements.Simulationresultsshowthatthealgorithmimprovethesystem’Sthroughputandguaranteesthefairnessamonguserswhilenotincreasingitscomputationcomplexity.Thirdly,users’servicesCanbedividedintohi曲speedandlowspeedservicesgroupintermsoft
7、hevelocityofusers.Sincetheirchannelstatesvaryquicklyforhighspeedusers,thechannelstateinformationwhichisfedbackbythereceivercannotshowthereal—timeconditionSOthatcannotguaranteesystem’Sperformance.Atthesametime,ifradioresourceallocationisfullybasedonchannelstateinformation,theseincrea
8、setheneedednumberof
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