外文翻译----无线红外通信

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1、拟建中的阜阳市中国XXXX国际服装城依托中国XX国际服装城，拟建成为皖西北地区规格最高、规模最大、商务及功能最优的现代化、国际化服装专业市场，建设规模占地约128亩，建筑面积约25万平方米，项目总投资约5亿元人民币。经过1--2年的开发建设，能达到正常运营期的中国XX.XX国际服装城将吸纳全国和世界各地的经销商、代理商企业物流总部等500—1000家，预计年交易额实现68亿元人民币，每年实现税收8000—10000万元人民币，每年实现利润1.68亿元人民币，实现就业和创业人员约2万以上。原文：WirelessInfraredCommunication

2、sI.IntroductionWirelessinfraredcommunicationsreferstotheuseoffree-spacepropagationoflightwavesinthenearinfraredbandasatransmissionmediumforcommunication(1-3),asshowninFigure1.Thecommunicationcanbebetweenoneportablecommunicationdeviceandanotherorbetweenaportabledeviceandatethere

3、ddevice,calledanaccesspointorbasestation.Typicalportabledevicesincludelaptopcomputers,personaldigitalassistants,andportabletelephones,whilethebasestationsareusuallyconnectedtoacomputerwithothernetworkedconnections.Althoughinfraredlightisusuallyusedotherregionsoftheopticalspectr

4、umcanbeused(sothetermwirelessopticalcommunications"insteadofwirelessinfraredcommunications"issometimesused).Wirelessinfraredcommunicationsystemscanbecharacterizedbytheapplicationforwhichtheyaredesignedorbythelinktype,asdescribedbelow.A.ApplicationsTheprimarycommercialapplicatio

5、nsareasfollows:²short-termcable-lessconnectivityforinformationexchange(businesscards,schedules,filesharing)betweentwousers.TheprimaryexampleisIrDAsystems(seeSection4).²wirelesslocalareanetworks(WLANs)providenetworkconnectivityinsidebuildings.Thiscaneitherbeanextensionofexisting

6、LANstofacilitatemobility,ortoestablish“adhoc”networkswherethereisnoLAN.TheprimaryexampleistheIEEE802.11standard(seeSection4).²building-to-buildingconnectionsforhigh-speednetworkaccessormetropolitan-orcampus-areanet-works.²wirelessinputandcontroldevices,suchaswirelessmice,remote

7、controls,wirelessgamecontrollers,andremoteelectronickeys.B.LinkTypeAnotherimportantwaytocharacterizeawirelessinfraredcommunicationsystemisbythe“linktype”whichmeansthetypicalorrequiredarrangementofreceiverandtransmitter.Figure2depictsthetwomostcommonconfigurations:thepoint-to-po

8、intsystemandthediffusesystem.Thesimplestlinktypeisthep