基于LTE下行鏈路的信道估計算法研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文基于LTE下行鏈路的信道估計算法研究姓名：馬項楠申請學(xué)位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：余立建201205西南交通大學(xué)碩士研究生學(xué)位論文第1l頁AbstractLTBsystemisanewgenerationsystemonwirelesscommunication，whichisdesignedforintegrationmobilecommunicationandbroadbandwirelessa

2、ccesstechnologyItsuplinksupportsthesinglecarrierfrequencydivisionmultipleaccessscheme，andinthedownlinkorthogonalfrequencydivisionmultipleaccesstechnologyisadoptedAndmeanwhile，itsupportsthemultiantennatechnologywhichiscal

3、ledMIMO，MultipleInputMultipleOutputmscombiningtechnologyinmdownlinksystemcouldexpandthecapacityofcommunicationsandgreatlyimprovetherateofdatatransmissionHoweverthetechnologyofchannelestimationisverysignificantforsynchron

4、izationandsignaldetectionandithasailimportantinfluenceonrelateddemodulationandcanimprovetheperformanceofthereceiversystemFirstlythisarticlebrieflydescribesthedevelopmentofLTEtechnologyanditsrelatedbackground，andsummaries

5、thecurrentstudyandthecommercialstatusoftheLTEsystem，andthenmakesanoverviewofthebasicprinciplesofthephysicallayerprotoc01OFDMtechnologyandthemultipleinputmultipleoutputantennatechnologyaresimplydescribed，afterthatdiscussi

6、onsandpresentationsaboutthewirelesschannelcharacteristicsandcommonfadingchannelmodelaremadeonthemobilecommunicationsystemSecondlythesummarizeandsomederivationofOFDMchannelestimationalgorithmsinthedownlinkLTEsystemarecard

7、edoutwhichcontainleastsquaresalgorithm，theestimationalgorithmbasedonthecriteriaofminimummeansquareerrorandthecommonchannelestimationmethodbasedonDiscreteFourierTransform，andthenitintroducesseveralchannelinterpolationalgo

8、rithmsAndaftertheintroductionofthevirtualcarrier，mesimulationandcomparativeanalysisarecardedontraditionalchannelestimationmethodandtheDCTbasedchannelestimationalgorithmAndthenseveralsimulationplansaremadeforthebetterwind

9、owprogram，andinordertomitigatetheimpactsofedgeeffects，theedgevaluerepetitionmethodisusedtocompensatefort11echannelresponseonthemissingvirtualcarderThisarticlefocusesonanoptimizationestimationmethodbasedonwaveletdecomposi

10、tionAfterthesimulationcomparedwithotherrelatedalgorithms，simulationresultsshowthattheperformanceofthemethodbasedonwaveletdecompositionisbetterthantheperformanceofthetraditionalDFTalgorithm111etraditionalestimationalgorit