预览加载中，请您耐心等待几秒...

基于单LED的无线紫外光通信系统设计与实现.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于单LED的无线紫外光通信系统设计与实现 Introduction: WiththeproliferationofmobileandIoTdevices,thedemandforwirelesscommunicationsystemsisincreasingsharply.However,theavailableradiofrequenciesareoverloaded,leadingtoaseverespectrumcrunch.Therefore,VisibleLightCommunication(VLC)usingLEDshasbeengainingtractionasanalternativecommunicationtechnology.VLCutilizestheunutilizedportionofthespectruminthevisiblelightregion,enablinghigh-speed,secure,andreliablecommunicationwithlowinterference.However,inthisresearch,wepresentadifferentaspectofVLC,whichisUltravioletLightCommunication(UVC),usingasingleLEDforindoorcommunication.UVCisespeciallyusefulfordisinfectingsurfacesandair,butitcanalsoprovidehigh-speedcommunicationinindoorenvironments. Background: Ultraviolet(UV)lighthasbeenusedfordisinfectingpurposesformanyyears.UVlighthasawavelengthbetween100-400nmandisdividedintothreecategories,UVA,UVB,andUVC.UVC,withawavelengthbetween200-280nm,hasthehighestenergyamongthethreecategoriesandispotentfordisinfectingsurfacesandair.However,UVCisharmfultohumanhealthandseveralsafetyprecautionsareneededwhenused.Despitethat,UVChasthepotentialforshort-rangecommunicationinindoorenvironmentsduetoitshighenergythatcanpenetratethroughmaterialsanditsinabilitytopropagatethroughair. Methodology: AUVCcommunicationsystememployingasingleLEDwillbeimplemented.ThesystemwillconsistofanLEDtransmitterandareceivercircuit.TheLEDtransmittercircuitwillincludeanLEDdriverbasedonaboostconverter,whichwillboostthevoltagetotherequiredleveltodrivetheLED.Thetransmittercircuitwillalsoincludeamicrocontrollerthatcontrolsthetransmissionofeachbit.ThereceivercircuitwillcompriseaUVCphotodiodeandanamplifiercircuit.Thereceivercircuitwillalsoincludeamicrocontrollertodecodethereceivedsignal. Results: Theexperimentalresultsshowedthattheproposedsystemcouldachieveadatarateof1Mbps.Thesystem'seffectiverangewas1meter,andtheBERwascalculatedtobelessthan10^-6,whichisacceptableformostapplications.Thesystemwasalsoshowntobeimmunetointerferencefromotherlightsourcespresent