通信工程专业英语论文

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1、姓名:高炜班级：通信工程2班学号：10021340208AtmosphericLaserCommunicationKeywords:AtmosphericlasercommunicationModulationTransmitReceiveApplicationAbstract：AtmosphereLasercommunicationisoneofnewcommunicationtechnologies，asaresultofmanyadvantagessuchaslargemessagecapacitance

2、s，thebestconfidentialityandsimpleequipmentandsoon，whichwouldtriggerarevolutionofnewcommunicationtechnology.Thepurposeofthispaperistoexploretheelementsoftheatmosphericlasercommunication，advantageanddisadvantageoflasercommunication.Maintext：Therehasbeentremend

3、oustechnicaladvancementofavailablecomponentssuchaslaser/LEDtransmitter,highsensitivityopticalreceiverofferingextremelyhighbandwidth,efficientmodulationtechniques,improvementinlowpowerconsumption,weight,andsize.Inspiteofmanysuchtechnologicaldevelopments,thema

4、jorlimitationoffree-spacelasercommunication(lasercom)performanceistheatmosphere.Atmosphericconditionultimatelydeterminesthelasercommunicationssystemsperformancenotonlyofterrestrialapplicationsbutalsoforuplink-downlink(e.g.,betweengroundandsatellite,aircrafto

5、rUAVterminals),becauseaportionoftheatmosphericpathalwaysincludesturbulenceandmultiplescatteringeffects.Atmosphericlasercommunicationtechnologyisanewtechnologyappearedrecently.Theelementofthenewtechnologyisthatopticalsignalcarriertransmitsthesignalpointtopoin

6、torpointtopointsbyatmosphere.Thistechnologyusesemiconductorlaserastheopticalsource，whichformsacommunicationsystemnameddigitalradiocommunicationsystem.Lasercommunicationsystemincludetwoparts：TransmittalandReception.TransmittalcontainsLasers,opticalmodulatoran

7、dopticalemittingantenna.Andreceptioncontainstheopticalreceivingantenna,opticalfiletandopticaldetector.Themessagesweneedtotransmitconnecttolasersinopticalmodulatorandopticalmodulatormodulatesthemessagestolaserandtransmittedbytheopticalemittingantenna.Attherec

8、eivingend,theopticalreceivingantennareceiveslasersignalandsendthesignaltoopticaldetector.Theopticaldetectortransformsthelasersignaltoelectricalsignalanddemodulateselectricalsignaltooriginalmessa