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《on the analysis of modern mobile communication technology（在分析現(xiàn)代移動(dòng)通信技術(shù)）》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、OntheanalysisofmodernmobilecommunicationtechnologyAbstract:Throughouttheworldtherapiddevelopmentofhigh-tech,21stcenturytelecommunicationsindustrywillbecomethelocomotiveofworldeconomy,communicationstechnologyisundergoingtremendouschangesBainianweiyuThispaperdescribesthethirdgenerationmobile
2、communicationtechnologydevelopmentstatus,andfinallylookedtofutureofmobiletechnologytrends.Keywords:mobilecommunication,3G,development;ProspectsI.IntroductionWiththerapiddevelopmentofthemobilecommunicationsmarket,usersofhighperformancemobilecommunicationssystemandahigherrequirement,wanttoen
3、joyamoreabundantandhigh-speedcommunicationsservices.Thesecond-generationmobileoperatorscompeteforeasingthepaceofdevelopmentmoreplusintense,tofindanewgrowthpoint,throughthedevelopmentofdata9servicestoimprovetheirqualityofserviceandtypeofbusiness,youneed3Gsupport.Atthesametimeasthesecondgene
4、rationofmobilecommunicationsradiofrequencyresourcesbecometighter,cannotmeetthecommunicationsneedsoflong-termdevelopmentneeds.Second,thedevelopmentprocessofmobilecommunicationsThefirstgenerationmobilecommunicationsysteminthe20thcentury,early80smade,anditwascompletedinthe20thcentury,theearly
5、90sthefirstgenerationmobilecommunicationsystemisbasedonanalogtransmission,whichischaracterizedbythevolumeofbusinessissmall,poorquality,topayallofthepoor,notencryptionandthespeedislow.Second-generationmobilecommunicationsystems(2G)originatedintheearly1990s,theEuropeanTelecommunicationsStand
6、ardsInstitutein1996proposedaGSMPhase2+,aimstoexpandandimprovetheGSMPhase1andPhase2intheoriginalperformanceofthebusinessanditincludesCMAEL(customerapplicationsmobilenetworkEnhancedLogic),SO9(supportoptimalrouting),immediatebilling,GSM900/1800dual-bandoperation,etc.,alsoincludesfullcompatibi
7、litywiththefullrate,enhancedvoicecodectechnology,makingthevoicequalityhasbeenaqualitativeimprovement,half-rateGSMcodeccannearlydoublethecapacityofthesysteminGSMPhase2+stage,amoreintensivefrequencyreuse,andmorere-use,multi-repeatstructureoftechnologywiththeintr
