lte-advanced的载波聚合：上行多址接入和传输增强功能

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1、CARRIERAGGREGATIONFORLTE-ADVANCED:UPLINKMULTIPLEACCESSANDTRANSMISSIONENHANCEMENTFEATURESLTE-Advanced的载波聚合：上行多址接入和传输增强功能YUNRUI,CHINESEACADEMYOFSCIENCESANDSTATEKEYLABOFISNPENGCHENG,SHANGHAIJIAOTONGUNIVERSITYMINGQILI,CHINESEACADEMYOFSCIENCESQ.T.ZHANG,NANJINGUNIVERSITYOFP

2、OSTSANDTELECOMMUNICATIONSMOHSENGUIZANI,QATARUNIVERSITY云瑞，中国科学院和ISN国家重点实验室上海交通大学程鹏李明启，中国科学院科学Q.T.张，南京邮电大学穆赫辛GUIZANI，卡塔尔大学ABSTRACTMultipleaccessandtransmissionenhancementinsupportofcarrieraggregationtechniqueshasbeenactivelystudiedinthe3GPPLTEAdvancedstandardizationproc

3、essofthenextgenerationmobilebroadbandcommunicationsystems.Bymeansofcarrieraggregation,userscanaccessatotalbandwidthofupto100MHzinordertomeettheIMT-Advancedrequirements.ThisarticlefirstintroducesandcomparesseveraluplinkmultipleaccessschemesinLTE-Advancedstandard.Techni

4、calchallengesarisingfromtheuseofcarrieraggregationisthenaddressed,withfocusonreferencesignalsdesignforuplinktransmission.Meanwhile,variouscandidateoptionsaresummarizedandcomparedintermsoftheirsystemperformance,computationalcomplexity,anddesignflexibility.Thearticlefur

5、therproceedstoinvestigatethelinkperformancewithcarrieraggregation,takingintoaccountthepresenceoffrequencyoffsetandfastfadingintheuplinkchannel.Numericalresultsarealsopresented,whichindicatethatadvancedsignalprocessingalgorithmsshouldbefurtherstudiedandoptimizedtoensur

6、ereliableoperationofthe3GPPLTE-Advancedinhighmobility摘要LTEAdvanced在3GPP标准化的下一代移动宽带通信系统的过程中，多个接入和传输增强，以支持载波聚合技术已被积极地研究。通过载波聚合，用户可以访问的总带宽高达100MHz，以满足IMT-Advanced的要求。本文首先介绍和比较了几种上行多址接入方案在LTE-Advanced的标准。然后使用载波聚合技术所带来的挑战，重点参考信号设计用于上行传输。同时，各种候选方案进行了总结和比较他们的系统的性能，计算复杂性，和设计灵

7、活性。的文章进一步进行调查载波聚合的链路性能，同时考虑到存在的频率偏移和上行链路中的信道快衰落。数值结果还提出，这表明，先进的信号处理算法，应进一步研究和优化，以确保可靠运行的3GPPLTE-Advanced的高迁移率INTRODUCTIONTomeettheincreasingdemandforwirelessbroadbandservicesfromfast-growingmobileusers,theInternationalTelecommunicationUnion(ITU)hasendeavoredinthedevel

8、opmentoftheterrestrialradiointerfacerecommendationsforthenext-generationmobilecommunicationsystems,endingupwithatechnicalsta