CDMA2000优点-外文翻译

《CDMA2000优点-外文翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、附录4外文资料AdvantagesofCDMA2000CDMA2000benefitedfromtheextensiveexperienceacquiredthroughseveralyearsofoperationofcdmaOnesystems.Asaresult,CDMA2000isaveryefficientandrobusttechnology.Itdeliversthehighestvoicecapacityanddatathroughputusingtheleastamountofspectrum,anditcanbeusedtoprovideservicesinurban

2、aswellasremoteareascosteffectively.Theuniquefeatures,benefits,andperformanceofCDMA2000makeitanexcellenttechnologyforhigh-voicecapacityandhigh-speedpacketdata.SinceCDMA20001Xsupportsbothvoiceanddataservicesonthesamecarrier,itallowsoperatorstoprovidebothservicescostefficiently.CDMA20001xEV-DOisopti

3、mizedfordataandiscapabletosupportlargevolumesofdatatrafficatbroadbandspeeds.1xEV-DOiswellsuitedtoprovidehigh-speeddataservicestoitsmobilesubscribersand/orbroadbandaccesstotheInternet.Duetoitsoptimizedradiotechnology,CDMA2000enablesoperatorstoinvestinfewercellsitesanddeploythemfaster,ultimatelyall

4、owingtheserviceproviderstoincreasetheirrevenueswithfasterReturnOnInvestment(ROI).TheCDMA2000evolutionarypathwasdesignedtominimizeinvestmentandtheimpacttoanoperator’snetworkwithoutserviceinterruptionfortheend-user.Thishasbeenachievedthroughbackwardandforwardcompatibility,hardwarereuse,in-bandmigra

5、tionandhybridnetworkconfiguration.ThisuniquefeatureofCDMA2000technologieshasprovidedoperatorsasignificanttime-to-marketadvantageoverother3Gtechnologies.IncreasedVoiceCapacityThespectralefficiencyofCDMA20001Xpermitshightrafficdeploymentsinasmallamount(1.25MHzchannel)ofspectrum.CDMA20001Xcanprovide

6、voicecapacityofnearlythreetimesthatofcdmaOnesystemswithSelectableModeVocoders(SMV)and10antennadiversitytechniques.CDMA2000delivers4-8timeshighervoicecapacitythanTDMA-basedtechnologies.CDMA20001Xsupports35trafficchannelspersectorperRF(26Erlangs/sector/RF)usingtheEVRCvocoder.Voicecapacityimprovemen

7、tintheforwardlinkisattributedtofasterpowercontrol,lowercoderates(1/4rate),andtransmitdiversity(forsinglepathRayleighfading).Inthereverselink,capacityimprovementisprimarilyduetocoherentreverselink.FormoreinformationonCD