數(shù)字電視地面?zhèn)鬏斚到y(tǒng)中抗干擾技術(shù)的研究.pdf

1、東南大學(xué)碩士學(xué)位論文數(shù)字電視地面?zhèn)鬏斚到y(tǒng)中抗干擾技術(shù)的研究姓名：劉壯申請學(xué)位級別：碩士專業(yè)：信號與信息處理指導(dǎo)教師：鄒采榮20080118AbstractAbstractRESEARCHoFTHETECHNoLOGYoFRESISTINGINTERFERENCEINDIGITALTELEⅥSIONTERRESTRIAI，BRoADCASTINGSYSTEMCandidate：LiuZhuang，Supervisor：ZouCaiRong

2、DepartmentofRadioEngineeringSoutheastUniversityChinaD11B(DigitaITelevisionTerrestrialBroadcasting)isoneofthepresentdigitaltelevisionbroadcastingmodeswhichisterrestrialwirelesstransmissionAfteradecadeofintcriseresearchand

3、development，thestandardsofDigital1_elevisionSatelliteBroadcastingandDigital1blevisionCableBroadcastinghavebeenconfirmedButthestandardofDi畫taITelevisionTerrestrialBroadcastingstillhasdisputation，foritstransmissionenvironm

4、entisratherawful。itsspectrumresourceisverylimitedanditsservicerequiredisdisperse，SOitispotentialtobeimprovedinmanyaspectsInthispaperIstudiedthekeytechnologyofDj2ital11elevisionTerrestrialBroadcastingandsimulatetheDVBTCOF

5、DMsystemAndputtheemphasisonthechannelestimation，equalizationalgorithm，thenoiseinterferencetothetransmissionsystemandthewayofeliminatingnoiseDVB—T(Di西talVideoBroadcasting)specificationisoneoftheDmstandardsIthasbetterresul

6、tsindi2italtelevisionprogramterrestrialreceptiontestandhasgoodappraisementjndi畫taltelevisionbroadcastingindustryTlliSPal：IerbasedonEuropeDVBTCOFDM(codedorthogonalfrequencydivisionmultiplexin曲system，researchedthechanneles

7、timationandequalizationtechnologyTheadvancedminimummeanestimationalgorithm，thenthenearest，linerGaus$。cubicandtimedomaininterpolationmethodswereapplied，next，thepapcrresearchedthechannelequalizationtechnologybasedonzerofor

8、CCcriteriOnandMMSEcriterionThenbasedonanalysistothepropertyoftheDVBTbroadcastchannel。introducedtheinfluenCeofSomenoisetypestotheDTTBsystemPutthefocuson2tvpesofImpulsivenoisemode：MarkOVandNonGaussianimpulsivenosemodel，and

9、discussedthepropertyofthemAtlastresearchtheTime—DomaininspectionmethodtoImpulsive—Noiseandputtheemphasison3waysofFrequency—DomaineliminationtoImpulsiveNoisebaseonchannelestimation：thecombinationofH丌andchannelestimation，p

10、ilotreplacement，pilotinterpolationandgavethecorrespondingsimulationtestandperformance00mfastindi能rentchannelThisPaperresearchedthedigitaltelevisionterrestrialbroadcastingsystems：DVBTCOFDMstandardincluding：channelencoding

11、／decoding，interleave，channelmodulation／demodulationetcBesides，thispaperfocasedonchannelestimationandequalizationtechnologywhichiSthekeytothewirelesstransmission，anddiscussedthemodeloftheImpulsive—Noiseandtheinfluencetoth

12、echannelreception，and3waysagainsttheImpulsiveNoiseThesimulationresultsshowthateachalgorithmcanachievethedesiredresultsKEYWORDS：DTTB，OFDM，PNsequencypilotfrequencychannelestimation，channelequalization，ImpulsiveNoise，n弭Pilo