資源描述：
《miso-ofdm下行鏈路中的高能效自適應(yīng)資源分配算法-研究》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、華中科技大學(xué)碩士學(xué)位論文AbstractWiththegreenhousegasemissionhasbeenprovedtoberesponsiblefortheglobalwarmingandfrequentlyextremelyclimate,thedemandofenergysavingcomestobecrucial.ThelatestestimationshowedthattheICTconsumed2%-10%oftotalenergyconsumptionallovertheworld，andthisweightwasstillgrowing,sowasthe
2、unitcostoftheenergy.Underthiscriticalbackground,bothacademeandindustryshowgreatconcerntothesystemperformanceonenergyefficiency,beingtheimportantpartofICT,themobilecommunicationhavethesamedemand.Onecategoryoftheeffectiveenergyoptimizationstrategiesistoimprovetheenergyefficiencyofthenetworkel
3、ementstoletperformanceofwholenetworkbeimproved.Inthecellularnetworksystem,sucheffortwasmainlyconcentratedonthewirelessaccessnetworks(basestations).Forthenumberofbasestationsisrelativehighwithrelativehighenergyconsumption,theenergyefficiencyimprovementofbasestationswillimprovetheperformanceo
4、fwholenetworkenormously.CorrespondingtothesituationthatwhileMIMO-OFDMcomestobedownlinkmultiaccesstechnologybythe3GPP-LTEstandardsbuttheimplementationofMIMOisstilllimitedinpractical,wemainlyfocusontheenergy-efficientadaptivepowerallocationinMISO-OFDMdownlinkscenario.Beginwiththeanalysisofbas
5、estationenergyefficiency,weformulatedtheenergyefficiencymodelofthesinglecellmultiusersMISO-OFDMsystem.ThencombinedwiththecharacteristicofOFDM,weinvestigatethecurrentlyenergy-efficientadaptiveresourceallocationstrategies.Inthefollowingpartsofourwork,wedesignaresourceallocationstrategythatpow
6、erallocatednon-equallyamongsubcarriers,butsubcarriersallocatedequallyamongtheselecteduserstodealwiththescenariothatthenumberofusersisgreatthansubcarriers.Todealwiththemuchmorepracticalscenariothatthenumberofsubcarriersisgreatthanusers,wedesignaresourceallocationstrategythatpowerallocatedequ
7、allyamongsubcarriers,butsubcarriersallocatednon-equallyamongtheusers.ThesetwoallocationstrategiescouldsatisfyboththetotaltransmissionpowerconstraintanduserdemandforQualityofService(QoS).Numericalresultsshowedthatbothallocationstrategiescouldeffectivelyme
