电子信息与通信工程专业英语lesson5(太原理工大学版)PPT资料.ppt
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电子信息与通信工程专业英语lesson5(太原理工大学版)PPT资料.ppt
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Chapter5Communication第5章通信电子信息与通信工程专业英语5.1AShortHistoryofCommunication通信简史5.2WirelessCommunicationTechnology无线通信技术5.3OpticalFiberCommunication光导纤维通信电子信息与通信工程专业英语5.4BasicNetworkingConceptsforComputerNetwork应用于计算机网络的基础网络概念电子信息与通信工程专业英语TEXT文章文章5.1AShortHistoryofCommunication1.Originaltechnologiesofcommunication2.Communicationatthespeedofelectricity电子信息与通信工程专业英语convergencen.集中,收敛,融合couriern.送快信的人,旅行从仆circuitswitching电路交换cyberterrorismn.网络dot-comsn.网络企业ecommercen.电子商务heliographn.日光仪电子信息与通信工程专业英语InterfaceMessageProcessorsn.接口信息处理机messageswitching报文交换monopolyn.垄断semaphoren.信号灯shacklevt.束缚skepticsn.怀疑学派sabbaticaln.学术假期Telenetn.远程通信网Telecopiern.远程复印机电子信息与通信工程专业英语Nomatterwhatcareeryouenter,youllneedtocommunicatewithpeople.Webelievethatcultural,social,andpersonalexperienceimprovesthroughmoreeffectiveunderstandingandpracticeofcommunication.CommunicationStudiesseektounderstandcommunicationandtoimproveitspracticeinavarietyofrelationships.电子信息与通信工程专业英语Wefocusontwopersonandfamilycommunication,communicationinsmallgroupsandinlargeorganizations,communicationacrosscommunities,thenatureoflanguageandsymbols,andthenatureofargumentandpersuasioninpoliticalsettingsandinsocialmovements.电子信息与通信工程专业英语Thehistoryofcommunicationcangobacktothousandsofyears.However,thetechnologiesthatsomanyofusareaddictedtotoday-mobilephones,theinternet,satelliteTV-arebuiltonourachievements.电子信息与通信工程专业英语Eachnewdevelopmenthastransformedtheworldwelivein.Anunderstandingofthejourneywehavetakentogetwherewearenowshowsthattodaystechniquesarerefinementsofwhatcamebefore.Reallybigrevolutionsmaybestilltocome.电子信息与通信工程专业英语1.OriginaltechnologiesofcommunicationCommunicationbeginswiththefirstconversationsbetweenpeople.Fireandthesmokeitproducesmayalsohavebeenusedforsimplecommunicationbetweenseparatedgroups.电子信息与通信工程专业英语TheinventionoftheprintingpressinChinasometimeafter300ADmeantthatthesamemessagecouldbedeliveredtomanypeoplecheaplyandmorequicklythancopyingoutthemessagemanytimesbyhand.电子信息与通信工程专业英语2.CommunicationatthespeedofelectricityWiththediscoveryofelectricitythespeedandrangeofcommunicationonceagainbegantoincrease.电子信息与通信工程专业英语TheinventionoftechniquessuchasMorsecodeallowedcomplexmessagestobetransferredatveryhighspeedsoverthisnewmedium.Thesehadhugerepercussionsformanyaspectsofhumanlife,forexample,transportcouldbebettercoordinated,governmentcouldtransmitdecisionstodistantofficesalmostinstantaneously,andbusinessescouldworkwithmorebusinessesoverlargerdistances.电子信息与通信工程专业英语Thefirstamplitudemodulation(AM)radiostationbeganoperatinginSpringfield,Mass.,shortlyafterWorldWarI,andthefirstfrequencymodulation(FM)stationwasauthorizedtooperatebytheFederalCommunicationsCommission(FCC)in1940.电子信息与通信工程专业英语ThefirsttelevisionstationwasauthorizedbytheFCCin1941andthefirstCATVstationsystembeganseveralyearslater.电子信息与通信工程专业英语SeeTable5-1Electricalcommunicationhistory电子信息与通信工程专业英语Atthesametimeasthesedevelopmentsinsound,peoplewereworkinghardoncapturingimages.Forhundredsofyearsartistsandscientistshadknownthatasmallholeinthewallofadarkenedroomwouldprojectanimageoftheoutsideworldontheoppositewall.电子信息与通信工程专业英语In1814JosephNicphoreNipceusedthisprincipletoprojectanimageoftheworldontochemicallytreatedpaperinabox,sothefirstphotographhadbeentaken.Imagesfromonepartoftheworldcouldbebroughttoanother.电子信息与通信工程专业英语ThisallowedpeopleinTanzaniatoseewhataLondonStreetlookedlike,andpeopleinLondontomarvelatMaasaiwarriorsdressedintheirfinery.In1877,EadweardMuybridgedevelopedacamerawhichcouldtakeaseriesofphotographsinrapidsuccession.电子信息与通信工程专业英语Hedidthisinordertowinabetonwhetherallahorseshoovesleftthegroundwhenitran.Helostthebet,butinventedthemoviecamera.By1927thishadbeencombinedwithrecordedsound,allowingpeopletosharerealisticexperiencesaroundtheworld.电子信息与通信工程专业英语Thetechnologiesthatwehavediscussedhaveallhelpedusstoreandtransmitcommunication.Allthesetechnologiesarejoiningtogetherintheformofcomputersandtheinternet.电子信息与通信工程专业英语5.2WirelessCommunicationTechnology1Introduction2.Wirelesscommunicationtechnology电子信息与通信工程专业英语In1895,Guglielmo-Marconiopenedthewayformodernwirelesscommunicationsbytransmittingthethree-dotMorsecodefortheletterSoveradistanceofthreekilometersbyelectromagneticwaves.电子信息与通信工程专业英语1.IntroductionTherearetwofundamentalaspectsofwirelesscommunicationthatmaketheproblemchallengingandinteresting.电子信息与通信工程专业英语Theinterferencecanbebetweentransmitterscommunicatingwithacommonreceiver,bet
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