2023年第1期0引言可见光通信（VLC）具有成本低、功耗小、安全性高、无电磁污染等优点，被视为解决当前无线频谱资源紧缺的一项新兴技术[1]。VLC技术分为2种：一种是采用单个光电二极管（PD）作为探测器，另一种是采用电荷耦合器件（CCD）或互补金属氧化物半导体（CMOS）成像器件作为接收机。基于单个PD的VLC系统通过采用均衡、正交频分复用（OFDM）、多进制正交幅度调制（MQAM）等先进调制技术，或采用多输入多输出（MIMO）结合不同的调制技术来提高数据传输速率。目前，基于单个PD的通信系统最高通信速率已经达到了Gb/s[2]。采用成像器件的VLC被称为光学相机通信（OCC），是VLC最实用的变体[3]。此外，智能设基于彩色LED阵列的光学相机通信系统实验研究ExperimentalresearchonopticalcameracommunicationsystembasedoncolorLEDarrayHUYanjing,CAIXiping*,LUYusong,CHENGGuidong（SchoolofPhysicalScienceandTechnology,HeilongjiangUniversity,Harbin150080,China）Abstract:Aimingattheproblemsoflowdatatransmissionrateanddifficultyinsynchronizationbetweenreceiverandtransmitterinvisiblelightcommunication（VLC）technology,anopticalcameracommunication（OCC）systemwithcolorlight-emittingdiode（LED）arrayastransmitterandmobilecameraasreceiverisproposed.Firstly,aspecialframestructurewasdesignedtosolvethesynchronizationproblemofthereceivingandsendingendsofthesystem,andanimageprocessingalgorithmwasestab-lishedtoextractgraystatisticalcharacteristicsofeachchannelofcolorLEDtodistinguishthecolorofLED.Then,thebackprop-agationneuralnetworkclassifierisintroducedtoimprovethecolorrecognitionaccuracy.Finally,thempseudo-randomsequenceisusedasthetestdatatomeasurethesystemcommunicationbiterrorrate,andtheimpactofthetransmitterrefreshrate,cameradeflectionangle,transmissiondistance,LEDcolornumberonthebiterrorrateisstudied.Theexperimentalresultsshowthatthedesignedframestructurecanensurethestabilityofinformationtransmission.Thesystemcanrealizereal-timecommunicationwithbiterrorrateof10-6magnitudeandcommunicationrateof4.824kb/swithin20~30cm.Keywords:visiblelightcommunication,opticalcameracommunication,light-emittingdiodearray,multiple-inputmultiple-out-puttechnolo...
