TDD智能天线系统的动态信道分配性能分析英

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1、北京邮电大学硕士学位论文TDD智能天线系统的动态信道分配性能分析（英）姓名：BANKOLE,JuliusAdeniyi申请学位级别：硕士专业：通信与信息系统指导教师：杨容文2002.10.1行f√孑zf．?／吖9p钮知乞天{．《驾t次胁乞力各／j轰赶勿雪乙k蛹乏场彳圩(丢)瓷健5刁：煎丝T—D—Dpc臼Fc月——一一!一tH钐至硌乏同PerformanceAnalysisofDynamicChannelAllocationinTDDsystemswi髓lSmartAntennaABSTRACTThedemandfor

2、cellularcommunicationsservicesisincreasingrapidly．AttheendofJune2001．thenulnbetofcdlu撕subscribersworldwideexceeded800miIlion．Mucbeffortisbeingdevotedtothedesignoftechniquestosupportalargenumberofusersin$limitedradiofrequencyband．Oneapproachistoemployamoreeffici

3、entchannelallocationscheme，The蠡r嚷andsecondgeneradoucellularsystemsmainlyprovidevoiceservices．Therefore，packetswitchingtechnologywillbeimplementedinthefuturecellularnetworkinordertosupporttheburstytrefilesources．Incellularsystems，capacityimprovementcanbeachieved

4、byreducingtheco—channelinterference．Severaltechniqueshavebeenproposedinliteratureformitigatingco—channelinterference，suchasadaptiveantennasandpowercontr01．Also，byallocatingtransmitterpowerandcommunicationchannelsefficiently(淄ourceallocation)，ovcrallco-channeljn

5、terfefencecanbemain锄nedbelowa如sired嗍imumtolerableleeel，whilemaximizingthecarriedtrafficofthesystem，l致thisresearchproject，theperformanceanalysisofaTDDcellularsystemwithsmartantennaintermsofthenumberofsatisfiedlasers，voicequality8ndsystemcapacityusingthedifferent

6、DynamicChannelAllocation(DCA)andFixedChannelAllocation帮CA)schemesareevaluated．Th。dynamiechannelallocationatgorithtr,sproposedherea∞basedonCostFunctionconcept，Iathisthesis。wecard聪outanextensivesimulationanalysisofacellularnetworkaimingtoinvestigatethecomplexinte

7、rrelationshipbetweenpowercontrol，channelallocationandsmartantennas．ThekeyalgorithmsinvestigatedafetheInterference-based，Pathlnss-basedandpriority-basedschemes．Performancecomparisoniscarriedoutbycomputersimulation．Fromthesimulationrcsulisobmined’wededucmdthatinc

8、reasedtrafficcapacitycanbeachievedwithournewDCAalgorithmsincomparisonwithFCA．Theseinvestigationsareconductedandanalyzedforlowspeeduser一3km／h—forbothspeechandpacketservices．D