通信与电子信息专业英语 课件 Unit 7 Principles of Communications.pptx

Unit7PrinciplesofCommunications

7.1ElectricalCommunicationSystems

7.2ModulationandMultiplexing

7.3DigitalCommunicationTechniques

7.1ElectricalCommunicationSystemsWordsandExpressionsBackgroundsText

WordsandExpressionscommunication n.通信；交流；传递；交通联系communicationengineeringcommunicationtechnology3Dhologram三维全息影像telepathy心灵感应；传心术

WordsandExpressionstransmission n.(电子信号、信息或广播电视节目的)传输，发送transmit/receive v.发送/接收transmitter/receiver n.发送方/接收方intelligence n.情报；智力；才智；智慧AI:ArtificialIntelligence 人工智能5

WordsandExpressionsinformation n.信息；消息；情报；资料；资讯ManymeansforthetransmissionofinformationhavebeenuseddownthroughtheagesrangingfromtheuseofsunlightreflectedfrommirrorsbytheRomanstoourmoderneraofelectricalcommunicationsthatbeganwiththeinventionofthetelegraphinthe1800s.从罗马人使用镜子反射阳光到19世纪电报发明开启的现代电气通信时代，人类使用了许多方法来传输信息。6

WordsandExpressionsuncertainty n.不确定性certainty确定uncertaintyprinciple测不准原理，不确定性原理perturbation n.扰动；干扰；微扰；小变异(physics)asecondaryinfluenceonasystemthatcausesittodeviateslightlyvelocityperturbation 速度波动thermalperturbation 温度扰动7

WordsandExpressionsprobabilistic adj.基于概率的；或然的Noisehasbeenanever-presentproblemsincetheearlydaysofelectricalcommunication,butitwasnotuntilthe1940sthatprobabilisticsystemsanalysisprocedureswereusedtoanalyzeandoptimizecommunicationsystemsoperatinginitspresence.自电气通信早期以来，噪声是一个始终存在的问题，但直到1940年代，概率系统分析方法才被用来分析和优化在噪声存在的情况下的通信系统。8

WordsandExpressionsdeterioration n.恶化，变坏；退化mechanicaldeterioration 机械损伤environmentaldeterioration 环境恶化Inthehigh-speedlonghaulopticalnetworks,theproblemofthesignaldeteriorationduringthetransmissionmustbesolved.在长距离超高速光通信网络中，光信号在传输过程中的恶化是一个必须解决的问题。9

WordsandExpressionstransducer n.传感器；换能器；变换器Sensorsfundamentallydetectthephysicalvariationsthatoccurinthesurrounding,transformitintoameaningfulquantity,andi