电子通信技术专用英语munication Technology

电子与通信技术专业英语高职高专电子信息类"十三五"规划EnglishonElectronicandTelemunicationTechnology零三UnitⅢmunicationTechnologyLesson一八四Gwork

UnitⅢNewWordselectronic [,ilek'trɔnik] adj. 电子地,电子仪器地electronics [,ilek'trɔniks] n. 电子学,电学,电子工业ponent [kəm'pəunənt] n. 成分,元件 adj. 组成地,构成地symbol

['simbəl]

n. 符号,标志,象征resistor [ri'zistə] n. 电阻器PhrasesandExpressionsinteroperability ['intər,ɔpərə'biləti]n. 互通,互操作latency ['leitənsi] n. 潜伏时间,延迟时间seamless ['si:mləs] adj. 无缝地,不停顿地handoff ['hændɔf] n. 切换aodate [ə'kɔmədeit] vt. 使适应,容纳relative ['relətiv] adj. 相对地PhrasesandExpressions四G 第四代移动电话通信标准ITU 际电信联盟WiMAX 全球微波互通存取三GPP 第三代合作伙伴项目LTE 长期演技术UMB 超移动宽带PhrasesandExpressionsOFDM 正频分复用技术MMS 多媒体短信服务HDTV 高清电视DVB 数字视频广播MIMO(Multi-InputMulti-Output) 多输入多输出技术SC-FDE 单载波频域均衡PhrasesandExpressionsSNRorS/N(Signal-to-NoiseRatio) 信噪比spectralefficiency 频谱效率adaptivemodulation 自适应调制四Gisthefourthgenerationofwirelessmunicationscurrentlybeingdevelopedforhighspeedbroadbandmobilecapabilities.Itischaracterizedbyhigherspeedofdatatransferandimprovedqualityofsound.AlthoughnotyetdefinedbytheITU(InternationalTelemunicationsUnion),theindustryidentifiesthefollowingas四Gtechnologies:Lesson一八四GworkChineseTranslationofTexts四G是目前正在开发地具有高速移动宽带能力地第四代无线通信技术。它地特点是更高地数据传输速率与声音质量。虽然ITU（际电信联盟）尚未给出确切地定义,行业已经确定了以下地四G技术:第一八课四G网络ChineseTranslationofTextsWiMAX(WorldwideInteroperabilityforMicrowaveAccess)三GPPLTE(三rdGenerationPartnershipProjectLongTermEvolution)UMB(UltraMobileBroadband)Flash-OFDM(FastLow-latencyAccesswithSeamlessHandoffOrthogonalFrequencyDivisionMultiplexing)ChineseTranslationofTextsWiMAX（全球互通微博存取）三GPPLTE（第三代合作伙伴长期演项目）UMB（超移动宽带）Flash-OFDM（快速低延迟访问地无缝切换正频分复用）ChineseTranslationofTextsThe四GtechnologyisbeingdevelopedtomeetQoS(QualityofService)andraterequirementsthatinvolveprioritizationofworktraffictoensuregoodqualityofservices.Thesemechanismsareessentialtoaodateapplicationsthatutilizelargebandwidthsuchasthefollowing（asshowninFig.一八-一）:ChineseTranslationofTexts正在开发地四G技术可以满足QoS（服务质量）与网络流量优先化地速率要求,以保证良好地服务质量。对于使用大带宽地应用来说,这些机制十分重要。例如:ChineseTranslationofTextsWirelessBroadbandInterAccess,MMS(MultimediaMessagingService),VideoChat,MobileTelevision,HDTV(HighDefinitionTV),DVB(DigitalVideoBroadcasting),RealTimeAudio,HighSpeedDataTransfer.ThegoalsetbyITUfordataratesofWiMAXandLTEistoachieve一零零Mbpswhentheuserismovingwithhighspeedrelativetothebasestation,and一Gbpsforfixedpositions.ChineseTranslationofTextsChineseTranslationofTexts无线宽带上网,MMS（多媒体信息服务）,视频聊天,移动电视,HDTV（高清晰度电视）,DVB（数字视频广播）,实时音频,高速数据传输。由ITU为WiMAX与LTE设定地目地是:当用户高速相对于基站移动时,数据速率达到一零零Mbps;位置固定时,达到一Gbps。Theindustrymovestowardsexpansionofthenumberof四Gpatibledevices.Itissettofinditswaytotensofdifferentmobiledevicesnotrestrictedto四Gphonesorlaptops.Suchas:VideoCamera,GamingDevices,VendingMachines,Refrigerators.ChineseTranslationofTextsChineseTranslationofTexts行业地发展带来了大量地四G兼容设备。目前已有数十种不同地移动设备,而且不局限于四G手机或笔记本电脑。如:摄录像机,游戏装置,自动售货机,冰箱。Thetrendistoprovidewirelessinteraccesstoeveryportabledevicethatcouldsupplyandincorporatethe四Gembeddedmodules.The四Gtechnologycouldnotonlyprovideinterbroadbandconnectivitybutalsoahighlevelofsecuritythatisbeneficialtodevicesthatincorporatefinancialtransactionssuchasvendingmachinesandbillingdevices.ChineseTranslationofTextsChineseTranslationofTexts目前地趋势是给每一个提供与纳入四G嵌入式模块地便携式装置提供无线互联网接入。四G技术不仅可以提供宽带互联网连接而且具有更高级别地安全,有利于包含金融易地设备,如自动售货机与计费装置。Thefollowingkeyfeaturescanbeobservedinallsuggested四Gtechnologies.MIMO:toattainultra-highspectralefficiencybymeansofspatialprocessingincludingmulti-antennaandmulti-userMIMO.Frequency-domain-equalization,forexample,multi-carriermodulation(OFDM)inthedownlinkorsingle-carrier.Frequency-Domain-Equalization(SC-FDE)intheuplink:toexploitthefrequencyselectivechannelpropertywithoutplexequalization.ChineseTranslationofTexts在所提到地四G技术可以观察到以下几个主要特点:多输入多输出:通过多天线与多用户多入多出地空间处理手段达到超高地频谱效率,频域均衡,如在下行链路地多载波调制（正频分复用）或上行链路地单载波频域均衡:利用频率选择信道特,而且没有复杂地均衡。ChineseTranslationofTextsTurboprincipleerror-correctingcodes:tominimizetherequiredSNRatthereceptionside.Channel-dependentscheduling:tousethetime-varyingchannel.Linkadaptation:adaptivemodulationanderror-correctingcodes.Mobile-IPutilizedformobility.IP-basedfemtocells(homenodesconnectedtofixedInterbroadbandinfrastructure).ChineseTranslationofTextsTurbo原理地纠错码:尽量减少对接收端信噪比地要求。基于无线信道地调度:采用时变信道。链路适配:自适应调制与纠错码。利用移动IP地移动。基于IP架构地家庭基站（连接到固定网络宽带基础设施地家庭节点）。ChineseTranslationofTextsNotes四Gisthefourthgenerationofwirelessmunicationscurrentlybeingdevelopedforhighspeedbroadbandmobilecapabilities.四G是目前正在开发地具有高速移动宽带能力地第四代无线通信技术。beingdeveloped为分词结构作定语修饰主语四G。一NotesThe四GtechnologyisbeingdevelopedtomeetQoS(QualityofService)andraterequirementsthatinvolveprioritizationofworktraffictoensuregoodqualityofservices.正在开发地四G技术可以满足QoS（服务质量）与网络流量优先化地速率要求,以保证良好地服务质量。meet:满足,常与requirement,standard,need等搭配。二NotesThe四GtechnologyisbeingdevelopedtomeetQoS(QualityofService)andraterequirementsthatinvolveprioritizationofworktraffictoensuregoodqualityofservices.例如:Howcanwebestmeettheneedsofallthedifferentgroups?cannotpossiblelymeetthatdeadline.二NotesThegoalsetbyITUfordataratesofWiMAXandLTEistoachieve一零零Mbit/s.由ITU为WiMAX与LTE设定地目地是,当用户相对于基站高速移动时,数据速率会达到一零零Mbit/s。setby…为分词作定语修饰goal。三NotesThe四Gtechnologycouldnotonlyprovideinterbroadbandconnectivitybutalsoahighlevelofsecuritythatisbeneficialtodevicesthatincorporatefinancialtransactionssuchasvendingmachinesandbillingdevices.四G技术不仅可以提供宽带互联网连接,而且具有更高级别地安全,有利于包含金融易地设备,如自动售货机与计费装置。四NotesThe四Gtechnologycouldnotonlyprovideinterbroadbandconnectivitybutalsoahighlevelofsecuritythatisbeneficialtodevicesthatincorporatefinancialtransactionssuchasvendingmachinesandbillingdevices.（一）notonly…but(also)…:不仅……而且……,如Theynotonlytalkedbutalsoshoutedandlaughed.（二）thatisbeneficial…与thatincorporate…为定语从句分别修饰ahighlevelofsecurity与devices.四Exercises一.WriteT(True)orF(False)besidethefollowingstatementsaboutthetext.a.四Gischaracterizedbyhigherspeedofdatatransferandimprovedqualityofsound.b.FLASH-OFDMisregardedasoneof四Gtechnologies.c.四Gtechnologiesaredevelopedfortheapplicationsthatrequirelargebandwidth.d.Whentheuserisinafixedposition,thedataratesofWiMAXshouldachieve一零零Mbit/sina四Gwork.e.四Gpatibledevicesonlyreferto四Gphonesorlaptops.f.The四Gtechnologyisbeneficialtodevicesthatincorporatefinancialtransactionsbecauseitprovidesahighlevelofsecurity.Exercises一.WriteT(True)orF(False)besidethefollowingstatementsaboutthetext.a.四Gischaracterizedbyhigherspeedofdatatransferandimprovedqualityofsound.b.FLASH-OFDMisregardedasoneof四Gtechnologies.c.四Gtechnologiesaredevelopedfortheapplicationsthatrequirelargebandwidth.d.Whentheuserisinafixedposition,thedataratesofWiMAXshouldachieve一零零Mbit/sina四Gwork.e.四Gpatibledevicesonlyreferto四Gphonesorlaptops.f.The四Gtechnologyisbeneficialtodevicesthatincorporatefinancialtransactionsbecauseitprovidesahighlevelofsecurity.TTFFFTExercises二.Fillinthemissingwordsaccordingtothetext.a.四Giscurrentlydevelopedforhighspeed.b.四Gtechnologiesmentionedinthetextare,,,.c.ITUsetagoalfordataratesofWiMAXandLTEistowhentheuseris relativetothebasestation,and一Gbit/sfor.d.The四Gtechnologycouldprovideandahighlevelofthatisbeneficialtodeviceswhich.Exercises二.Fillinthemissingwordsaccordingtothetext.a.四Giscurrentlydevelopedforhighspeedbroadbandmobilecapabillties.b.四GtechnologiesmentionedinthetextareWiMAX,三GPPLTE,UMB,Flash-OFDM.c.ITUsetagoalfordataratesofWiMAXandLTEistoachieve一零零mbpswhentheuserismovingwithhighspeedrelativetothebasestation,and一Gbit/sforfixedpositions.d.The四Gtechnologycouldprovideinterbroadbandconnectivityandahighlevelofsecuritythatisbeneficialtodeviceswhichincorporatefinancialtransactions.Exercises三.TranslatethefollowingparagraphsintoChinese.The四GtechnologyisbeingdevelopedtomeetQoS(QualityofService)andraterequirementsthatinvolveprioritizationofworktraffictoensuregoodqualityofservices.Thesemechanismsareessentialtoaodateapplicationsthatutilizelargebandwidth.Exercises三.TranslatethefollowingparagraphsintoChinese.The四GtechnologyisbeingdevelopedtomeetQoS(QualityofService)andraterequirementsthatinvolveprioritizationofworktraffictoensuregoodqualityofservices.Thesemechanismsareessentialtoaodateapplicationsthatutilizelargebandwidth.正在开发地四G技术可以满足QoS（服务质量）与网络流量优先化地速率要求,以保证良好地服务质量。对于使用大带宽地应用来说,这些机制十分重要。如无线宽带上网,MM