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厦门工学院12级通信工程专业英语复习整理【由EcHacl整理】-1-Unit1【中译英】(1)信号:signal(2)波特率:thebaudrate(3)单工:simplex(4)同步:synchronous(5)信道:communicationschannel(6)模拟:analog(7)数字:digital(8)电磁的:electromagnetic(9)串行口:serialport(10)带宽:bandwidth【英译中】(1)baud:波特(2)asynchronous:异步的(3)fullduplex:全双工(4)parallel:并行(5)electromagnetic:电磁的(6)discrete:离散的(7)simultaneously:同时发生地(8)parity:奇偶校验【句子翻译(英译中)】1.Sincetransmitteddatacanbeassignedtodifferentfrequencies,thewiderthebandwidth,themorethefrequencies,andthemoredatacanbetransmittedatthesametime.因为传输的数据能被分配到不同频率,所以带宽越宽频率越多,同一时间能被传输的数据就越多。2.Todistinguishwhereonecharacterstopsandanotherstarts,theasynchronouscommunicationmodeusesastartandastopbit.为了辨别一个字符在什么地方结束而另一个字符在什么地方开始,异步通信模式使用一个起始位和一个结束位。3.MoretechnicalmanesfortheserialportareRS-232Cconnectorandasynchronouscommunicationport.串行端口技术上又叫做RS-232C连接器和异步通信接口。【段落翻译(英译中)】Thethirdisthetransmissionmode.Transmissionmodesincludetheasynchronousmodeandthesynchronousmode.Intheasynchronoustransmissionmode,individualcharacters(madeupofbits)aretransmittedatirregularintervals,forexample.Whenauserentersdata.Todistinguishwhereonecharacterstopsandanotherstarts,theasynchronouscommunicationmodeusesastartandastopbit.Anadditionalbitcalledaparitybitissometimesincludedattheendofeachcharacter.Paritybitsareusedforerrorchecking.Theasynchronoustransmissionmodeisusedforlowerspeeddatatransmissionandisusedwithmostcommunicationequipmentdesignedforpersonalcomputers.第三是传输模式。传输模式包括异步和同步。在异步传输模式中,单独的字符(由比特组成)以不规则的时间间隔传输,例如当用户输入数据时。为了辨别一个字符在什么地方停止而另一个字符在什么地方开始,异步通信模式使用一个起始位和一个停止位。一个称为奇偶位的附加位有时包含在每个字符的末端。奇偶位用于错误校验。异步传输模式用于低速数据传输以及用在设计适合个人计算机的大多数的通信设备中。Unit3【中译英】(1)载波:CarrierFrequencies(2)多路复用:Multiplexing(3)载波振荡频率:thefrequencyatwhichthestation’scarrieroscillates(4)频分复用:FrequencyDivisionMultiplexing(5)旋转开关:round-robinscheme(6)时分复用:TimeDivisionMultiplexing【缩写翻译】FDM:FrequencyDivisionMultiplexing频分复用TDM:TimeDivisionMultiplexing时分复用【句子翻译(英译中)】(1)Infact,achannelnumberismerelyshorthandforthefrequencyatwhichthestation’scarrieroscillates.实际上,频道号码就是电视台载波用的振荡频率的速记。(2)Areceiverconfiguredtoacceptacarrieratagivenfrequencywillnotbeaffectedbysignalsentatotherfrequencies.一个接收器被设置成接收给定频率的载波,它将不会受其他频率信号的影响(或干扰)。(3)FrequencyDivisionMultiplexing(FDM)isthetechnicaltermappliedtoanetworksystemthatusesmultiplecarrierfrequenciestoallowindependentsignalstotravelthroughamedium.频分复用(FDM)是使用多个载波频率在一个介质中同时传输多个独立信号的计算机网络系统术语。厦门工学院12级通信工程专业英语复习整理【由EcHacl整理】-2-(4)Inpractice,however,twocarriersoperatingatalmostthesamefrequencyoratexactmultiplesofafrequencycaninterferewithoneanother.实际上,两个频率相近或频率成整数倍的载波会彼此干扰。(5)ThemandateforlargegapebetweenthefrequenciesassignedtocarriersmeansthatunderlyinghardwareusedwithFDMcantolerateawiderangeoffrequencies.在各载波的频率之间的大间隔意味着FDM所用的硬件能容纳很宽的频率范围。(6)ThegeneralalternativetoFDMistimedivisionmultiplexing(TDM),inwhichsourcessharingamediumtaketurns.与FDM不同的另一种复用形式是时分多路复用(TDM),按这种方式各发送源轮流使用共享的通信介质。【段落翻译(英译中)】Dividingdataintosmallpacketsensuresthatallsourcesreceivepromptservicebecauseitprohibitsonesourcefromgainingexclusiveaccessforanarbitrarilylongtime.Inparticular,ifonesourcehasafewpacketstosendandtheotherhasmany,allowingbothsourcestotaketurnssendingpacketswhichguaranteesthatthesourcewithasmallamountofdatawillfinishpromptly.将数据分成小包以确保所有的信源都能得到及时服务,因为这时是禁止一个信源获取一个独占的长时服务。尤其是,如果一个信源需要发送的数据包数量较少,而另一个信源需要发送的数据包较多时,采用时间片轮转方式使两个信源轮流发送数据包以确保数据包较少的信源的数据发送能及时完成。Unit4【中译英】(1)电磁波:Electromagneticwave(2)同轴电缆:Coaxialcable(3)双绞线:twisted-pairwire(4)微波系统:Microwavesystem(5)同步卫星:Satellitesystem(6)无线电波饱和度:thesaturationoftheairwaves【英译中】(1)unsheathed:无覆盖的(2)insulator:绝缘体(3)susceptible:易受影响的(4)vicinity:邻近地区(5)curvature:曲度(6)antenna:天线(7)gigahertz:千兆赫(8)nonconductive:不传导的【句子翻译(英译中)】(1)Theformormethodofcommunicationsaffectsthemaximumrateatwhichdatacanbemovedthroughthechannelandthelevelofnoisethatwillexist...通信的形式或方法决定着数据可以通过信道传输的最大速度以及会出现的噪声等级......(2)Obviously,somesituationsrequirethatdatabemovedasfastaspossible,othersdon’t.显然,有时要求数据传输得越快越好,有时则不然。(3)Understandinghowthesemediafunctionwillhelpyousortoutthevariousratesandchargesforthemanddeterminewhichisthemostappropriateinagivensituation.理解这些媒介的性能将帮助你区别不同的速率和费用并决定在一个特定的情况下哪一种是最适合的。(4)...whichlimitsthepracticaldistancethatdatacanbetransmittedwithoutbeinggarbled.......这限制了数据不失真传输的实际距离。(5)Tobereceivedintact,digitalsignalsmustbe“refreshed”everyonetotwomilesthroughtheuseofanamplifierandrelatedcircuits,whichtogetherarecalledrepeaters.数字信号想要完整接收,必须每1~2英里用放大器及相关电路重新放大,这种放大装置称为增音器。(6)Thedistancebetweenthetowersdependsonthecurvatureofthesurfaceterraininthevicinity.两座塔之间的距离取决于附近地表的弯曲程度。(7)Eachtowerfacilityreceivesincomingtraffic,bootsthesignalstrength,andsendsthesignaltothenextstation.每个塔上的设备接收过来的信号,加以放大,并把信号发送到下一个基站。(8)However.Thesaturationoftheairwaveswithmicrowavetransmissionshasreachedthepointwherefutureneedswillhavetobesatisfiedbyothercommunicationsmethods,suchasfiberopticcablesorsatellitesystems.但是,当传输微波的空气波达到饱和状态时,必须要有其他方式来满足将来的需要,例如光纤和卫星系统。厦门工学院12级通信工程专业英语复习整理【由EcHacl整理】-3-【段落翻译(英译中)】Insteadofusingwireorcables,microwavesystemscanusetheatmosphereasthemediumthroughwhichtotransmi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