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ID:33509650
大小:2.22 MB
页数:52页
时间:2019-02-26
《ofdma无线多跳中继网络中关于能效的资源分配的研究》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、traditionalcellularnetworkhasbeenunabletomeettheneedsofthehighspeedrateandthehighqualityofservice.Thenext.generationwirelesscommunicationtechnologystandards.suchasIJE—AandWiMAX.haveintroducedtheRelayStationtoassisttheBaseStationtocompletethedatacommunication.Introdu
2、cingRelayStationcalleffectivelyexpandtheeellcoverage,implovetheusers’qualityofserviceinthecelledge,andimprovethesystemthroughput.Meanwhile,becauseoftheabilityofanti.multipath.theimprovementofthesystemspectralefficiency,andtheflexibleallocationofresources,OrthogonalF
3、requencyDjvisionMultiplexingistreatedasthetechnicalbasisofthefourthgenerationmobilecommunicationstandard.Inthisthesis.OFDMAwhichisbasedonOFDMistheresearchfoundation.TIlisthesisfirstlyintroducesthebasicprinciplesof0FDM/OFDMA.theframestructureofOFDMA,andtheclassificat
4、ionofRS。thellitanlayzesindetailthenewproblemsandchallengesonthechan2ingofOFDMAframestructureandresourcemanagementaftertheintroductionofRS.Secondly,itanlayzestheglobaljointoptimumallocationalgorithmwhichisbaesdontheminimumsystempowerconsumptioninOFDMAcellularnetwork.
5、aswellasvarioussub.optimizationschemes.Andtheperformanceofvariousallocationalgorithmscanbeevaluatedthroughthesimulation.Finally,thetwo—hoplinkinOFDMAAFrelaysystemisvirtualizedasasingle—hoplink.andtheoptimalglobalresourceallocationalgorithmin也eOFDMAcellularnetworkisi
6、ntroducedtotherelaysystem.anditcanimprovethedesignaccordingtotheactualscenarios.Thesimulationresultsshowtllattheimprovedglobalresourceallocationalgorithmismoreapplicabletotheactualsceneoftherelaysystem。andcaneffectivelyimprovetheenergye伍ciencyandthesystemthroughputw
7、hilemaintainingthefairnessofthedifferentUSerS.Forthepacketschedulingin0FDMAtwo.hoprelaysystem,thisthesisfirstlyanlayzestheenergye衔ciencyofdifferentmodulationsandcodingschemesforasingleuserandtheoccupancyoffrequencyresourcesandpowerresourcesforasingleUSer,thellituses
8、theanalysisresultstoproposeaproportionalfairschedulingalgorithmbasedonenergyefficiency.Tllisalgorithmconsiderstheschedulingpriorityfactort
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