文档介绍：该【通信工程专业毕业设计（论文）外文翻译-无线通信技术在电网通信中的应用前景 】是由【老狐狸】上传分享，文档一共【33】页，该文档可以免费在线阅读，需要了解更多关于【通信工程专业毕业设计（论文）外文翻译-无线通信技术在电网通信中的应用前景 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。英文翻译08通信(2)班余凯0805070120英文文献:munication[TechnicalAnalysisofthethesisKeywords]wireless;munication;[Abstract]work,,,,'workthroughtheconstructionofseveraldecadesofupsanddowns,hasbeguntotakeshape,workviasatellite,microwave,carrier,,,andstrongresistancetonaturaldisasters,butalsohaslargebandwidthandtransmissiondistance,non-line-of-sighttransmission,etc.,,municationstransmissionsystem,--worksupporttechniquesincludepositioningtechnologies,synchronizationtechnology,securitytechnology,workinformationprocessingtechnology,,informationprocessingtechnologyisdesignedpackagingfurtherintegrationoftheoriginaldatacollection,work,whichsimplifiestheequipmentrequirementsontheclient,theusersidecanbeperceivedtousemorelow-workhasamoreadvanced,betterinformationprocessingcapabilities,availabletotheuser',thewirelesstechnologyintroduced(A)municationtechnologyCurrently,,wirelessterminalandapplicationserver.(B)(WPAN),(WLAN)(WMAN)-basedwirelessWAN(WWAN).Overall,therepresentativesofthelong-esstechnologies:GSM,GPRS,3G;onbehalfoftheshort-esstechnologies,including:WLAN,:(MMDS),LocalMultipointDistributionService(LMDS),;esstechnologiesincluding:,,,-,LMDS,WiMAX;narrow-esstechnologyonbehalfoffirst-andsecond-+:fourkindsofB3G,WiMAX,WiFi,,municationtechnologyalsoincludes:IrDA,Bluetooth,theRFID,UWB,munications,andothershort-municationstechnologyandonLMDS,MMDS,andpoint-to-pointmicrowave,munications,municationtechnology.(1)theIrDA:InfraredDataAssociation,isapoint-to-pointdatatransferprotocol,municationdistanceisgenerallybetween0~1m,thefastesttransferratesupto16Mbps,municationmediumforthenear-infraredwavelengthsaround900nm.(2)Bluetooth:,.(3)ofRFID:RadioFrequencyIdentification,ie,-contactautomaticidentificationtechnology,,Interpretationofthreebasicelements,andantenna.(4)theUWB:UltraWideband,Ultra--munications,municationssystems,RFandmicrowavedevicesneedverylittle,plexityofthesystem,reducingThemeritsofwirelesstechnology(A)WLANtechnologyWi-Fitechnologiesandproductsarealreadyquitemature,,broadbandapplicationsfortheparticularlocation,eventhoughtheWi-Fitechnologyiswidelyused,butitisstillinthesecuritythereisacertainsecurityrisk,theWi-Fiusesaradiofrequency(RF),areveryvulnerabletoattacksfromoutsidehackerscaneasilystealdatawithinthecoverageofthewavesandevenintotheunprotectedinternalLAN.(B)analysisofWiMaxWiMaxisastate-of-the-arttechnology,theintroductionofrelativelylate,therearesmallfrequencyreuse,theuseoftheproblemoflow,butonlyrecentlystandardized,large-,coveragecanincludeoutdoorandindoor,canbealargeareaofcoverage,-longtransmissiondistance,hasbeentheindustryoptimisticaboutthefuturedirectionofdevelopmentofmobiletechnologies,essservices.(C)ofWMNtechnologyosupportlarge-,theimageacquisitionmodulecanmonitorordataacquisitionofthetargetobject,,soastobeabletoexceedandplaytheirrespectiveadvantages.(D)3Gtechnicalanalysis3G1996standards,pletetheupper-layerprotocols,,work,worklinkbudget,-mercialapplications,suchasmanyEuropeancountries,Japan,,work.(5)onLMDStechnicalanalysisLocalMultipointDistributionbusinesssystems,LMDSisapoint-to-esstechnology,itsoperatingfrequencyto20GHzabove,theuseofmillimeter-wavetransmission,withinacertainrangeofdigitalduplexvoice,data,andvideoservices,,thedistanceupto8km;However,,withouttheneedforEachuserspecificallylayingfiberorcopper,toachievebi-directionalsymmetricalhigh-bandwidthwirelesstransmission.(6)MMDS,technicalanalysisMMDSThemaindrawbackisblockingthesignalqualityisvulnerabletochangesintheweather,theavailablefrequencybandisnotwideenough,,,(includingBPSK,DQPSK,QPSK)andquadratureamplitudemodulationQAMmodulationtechnique,andcannotdothenon-line-of-,MMDSisnouniforminternationalstandards,patibilityissues.(G)trunkingtechnologyDigitaltrunkingsystemhasmanyadvantages,itsspectralefficiencyhasgreatlyimproved,canfurtherimprovetheusercapacityoftheclustersystem;itincreasestheabilitytosignalanti-fadingchannel,changedforthebetterqualityofwirelesstransmission;developeddigitalencryptiontheoryandpracticaltechniquesfordigitalsystems,confidentiality,-service,thatisinadditiontothedigitalvoicesignal,butalsocantransmitdigital,,work.(H)point-to-pointmicrowavetechnologyThemainadvantageofmicrowavetransmissioninthefollowingaspects:First,itcanreducetheoperator'paredtoleasedlines,microwavesystems,,paredwiththetraditionalmeansoftransmission,,thecurrentmicrowaveproductsforthefuturedevelopmentistoprotect,,themicrowavetransmissionsystemwillbeupgradedtoall-IPplatform,canfullysupportthefuturedevelopmentoftheoperators.(Ix),butnotintensiveusersofawiderscope,,esssystemisrelativelygoodandrealisticprogram,,afterall,municationsplatform,thegroundstation,municationchannelrentalcostsneedtospendalotofmoney,pany,byitsbandwidthlimit,,asthedailyproduction,thelifeuseisextremelyuneconomical;municationsaremoresuitableasmunications,munications.(1),forthepowergrid,,moreandmoreelectricalappliancesbroughtusgreatconvenienceatthesametime,knewthepowercordofavarietyof"disarray",alltheseyearsoftechnologicaldevelopment,thegrowingpopularityofwirelessdatatransmissiontechnology,scientistshaveagreatbreakthroughinwirelesspowertransmission(WirelessPowerTransmissionWPT),asense,thewirelesspowertransmissionisnolongerafantasy-epossibleinthefuturelife.(2)thehistoryofthedevelopmentofwirelesspowertransmission