MIMO-OFDM系統同步和信道估計的聯合優(yōu)化.pdf

1、學科門曩王主丹類號：型!!!!啦々代碼—j垡!!!一嵩城——孫未瓠黿童速碩士學位論文論文題日：塑!叢Q二Q!堡墜丕塹旦壟塑信道估計的聯合優(yōu)化學生學指導學利姓名號教師專業(yè)朱玲碩050427邵世祥教授通信與信息系統研究方向移動通信與尤線技術論文提交日期二oo八年三月南京郵電大學碩士研究生學位論文摘要AbstractAsthecombinationofMIMOandOFDM，MIMO—OFDMtechniquegiveshighspeedda

2、tatransferinmultipathfadingchannelInrecentyears，MIMOOFDMhasemergedasoneofthemostsignificanttechnicalbreakthroughsinwirelesscommunicationsFirstly，thepaperdescribesthebasicprincipleofMIMOandOFDM，constructsawholeMIMOOFDMsim

3、ulationplatformandgivessimulationresultstoevaluatetheperformanceofthesystemThenweinvestigateandanalyzethealgorithmsofframesynchronization，frequencysynchronizationandsymboltiminginMIMOOFDMsystemConsideringthatMIMO—OFDMsys

4、temisextremelysensitivetosynchronizationandchannelestimationimperfections，meanwhile，thetiming，frequencysynchronizationandchannelestimationmayaffecteachother，thepaperinvestigatesajointchannelestimationandsynchronizationsc

5、hemetoimprovetheperformanceofsynchronizationiniterativewayTheschemeincludesthreestagesforperformanceimprovementandsimplicityAtthefirststage，theframesynchronization，frequencysynchronizationandsymboltimingarecompletedAtthe

6、secondstage，channelimpulseresponseisobtainedandbyutilizingtheusefulinformationinchannelimpulseresponsetheperformanceofsymboltimingcanbeimprovediniterativewayCarrierphasetrackingandequalizationisobtainedatthethirdstageInt

7、hepaper，weproposeanimprovedmethodforframesynchronization，ithaslowercomplexityandbettersynchronizationperformancethenthetraditionaloneWealsooptimizetheLSchannelestimationmethod，theperformanceofcharmelestimationCanbeimprov

8、edbyremovingthenoisecomponentoftime—domainchannelimpulseresponseAtlastwegivecomparisonsandanalysisofthejointoptimizationschemeindifferentchannelconditionsundertheMIMOOFDMsimulationplatformofdifferentantennastructures，inw