大時延衰落通信系統(tǒng)信道估計與均衡的設計與實現.pdf

1、南京航空航天大學碩士學位論文大時延衰落通信系統(tǒng)信道估計與均衡的設計與實現姓名：張新輝申請學位級別：碩士專業(yè)：信號與信息處理指導教師：徐大專201012大時延衰落通信系統(tǒng)信道估計與均衡的設計與實現iiABSTRACTMultipathspreadvaryingofchannelarethetwomainissuesneedtobesolvedinwirelesscommunicationsystems.Aproperchannelesti

2、mationequalizationmethodinsomespecificmultipathfadingchannelwillplayanimptantroleintheimprovementofoverallperfmance.Thispaperiscommittedtosolveapracticalproblemencounteredinengineering:todesignchannelestimationequalizati

3、oninahighspeedsinglecarrieraviationcommunicationsystem.Inhighspeedsinglecarrieraviationcommunicationsystemthepowerofmultipatharegreatwhichwillresultinseriousintersymbolinterference.Meimptantlythenumberofsymbolscrespondin

4、gtothemultipathdelayisalsolargemakingcomplexityofexistingchannelestimationequalizationmethodsincreasedrastically.Thatistosaytraditionalmethodscan’tmeettheengineeringneedsintheseconditions.Aimingathighspeedsinglecarrierav

5、iationcommunicationsystemthispaperdoresearchinkeytechnologiesofchannelestimationequalizationappliedtoparticularaviationchannelproposesolutionsappliedtolargedelaystrongmultipathinterferenceinairtoaircommunication.Thenwewi

6、lldesignsoftwareprogrambasedonhardwaredeionlanguagetosolvemultipathissueinFPGA.Mainwkofthispaperisasfollows:1.Aftersystematicanalysisofdigitalmultiplexerdemultiplexerlowspeeddigitalsignalpilotsequencesfillingframewouldbe

7、mergedtohighspeedsignalinthetransmittingterminaltheninthereceivingterminalpilotsequencesfillingframewouldberemoved.2.ProposedachannelestimationmethodtakinguseofthecrelationofPNsequence.Thismethodhaslowcomplexityhighaccur

8、acycouldbeanidealchannelestimationmethodinlargedelayfadingcommunicationsystem.3.Basedontheimplementionofchannelestimationweresolvedthemultipathinterferenceusingdecisionfeedbackequalizerresolvedtheequalizationissueencount

9、eredinhighspeedsinglecarrieraviationcommunicationsystem.Theantimultipathsysteminthispaperresolvedmultipathinterferencecouldwkwellinbadexternalenvironment.Thesystemhashighapplicationvaluemeresearchwkonchannelestimationequ