Audio Transmission with Li-Fi Technology by IRJET Journal

Arepresentationofsoundisanaudiosignal.Frequenciesintheaudiorangeof20to20000Hzareusedinaudiosignals.The mechanismbywhichaudiosignalsareroutedandprocessedisknownasanaudiotransmissionsystem.Theaudiosignalwas transmittedviamicrophones,andthesignalwasroutedtoasingleoutputchannel.Microphoneswillsendandprocessaudio signals,butthelightinthisarticlewillfunctionasatransmitter,transportingdata.

TheacronymLI FIrefersfor‘Light Fidelity’.HaraldHass,aGermanphysicist,inventedthephraseLI FI.Thisisthenext generationoftheinternet,inwhichdataissentusinglightasamedium.LI FIisanovelandefficientkindofwirelessLight based communication.LI FIisanewandefficientwirelesscommunicationtechnologythatsendsdatausinglight.It'sthesamelightwe useinourhomesandoffices,butwithafewchanges,itcanconveydatatoallofourinternet connecteddevices.Totransfer audiodata,VISIBLELIGHTCOMMUNICATION(VLC)isemployed,andLI FI(LightFidelity)technologyhasbeendeveloped.LI FI isaone of a kindmethodofsendingdataacrosssmalldistancesinaquickandeffectivemanner.TheoperatingprincipleofLI FI istocommunicatedatainastandardizedmannerusingtheAMofthesunlightsource.Wecantransferdataatspeedsmorethan 10Gbpswiththismethod,anditsoperationalfrequencyrangesfrom400THzto800THz.

1.INTRODUCTION

Key Words: Visible Light Communication, Li-Fi, Wi-Fi, Radio-waves, Light Emitting Diodes (LED), LASER

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072 Audio Transmission with Li-Fi Technology Dr.Sanjana Prasad1 , Prof. Syeda Husna Mohammadi 2 , Ms. Sowmya P3 , Mr. Sumith Mandolkar4 , Dr. Arun S5 1Associate Professor, Department of ECE, HKBK College of Engineering, Bengaluru 45, India 2Assistant Professor, Department of ECE, HKBK College of Engineering, Bengaluru 45, India 3UG Student, Department of ECE, HKBK College of Engineering, Bengaluru 45, India 4UG Student, Department of ECE, HKBK College of Engineering, Bengaluru 45, India 5Assistant Professor, Department of ECE, CMR Institute of Technology, Bengaluru 37, India *** Abstract Light may be used to communicate any type of information. This work focuses on constructing a system for delivering audio signals utilizing the LI FI technology, in which Visible Light Communication (VLC) is a method of transmitting data using light (VLC). LI FI is a brand new light based technology. It transmits data using light rather than regular radio waves. Wi Fi is currently the most effective method for transmitting data over radio waves in the electromagnetic spectrum. Wi Fi employs radio waves, which are extremely damaging to humans, and radio waves have the power to penetrate through medical instruments, causing harm to patients. The concept of LI FI is gaining traction as a novel kind of data transfer that employs light waves rather than radio waves to deliver data. When it comes to data transmission, choosing a light source is crucial. The Light Emitting Diode (LED) can be used as a light source, but it has a number of disadvantages, such as overheating, shorter lamp life, less distance coverage, non directionality, low intensity, and so on, so we are using Laser in replacement with LED. Because, when compared to LED, laser providesgreaterbenefits.High intensity,singlewavelength,applicationoptimized,directionality,monochromaticity,constant output, greater value, high intensity, focuses on a specific spot. As a result, the suggested system uses "LASER" as a light source. So that data transmission is as efficient as possible. Low latency, high efficiency, accessible spectrum, and high data transmission are all features of LI FI. The data can't be hacked because it's well protected. This technology provides a secure interface transmission and will play a critical role in the future of communication.

ItisapartoftheIEEEstandardIEEE802.15.7.WirelessLI FItechnologyinthefuturemightattaindataspeedofupto 100Gbps.WI FIisnowusedaroundtheworld;but,becauseofitsspeedandsecurity,LI FIwillsupplantWI FIinthefuture years.Withtheaidoftheelectromagneticspectrum,high speeddatatransferutilizingLI FImaybedescribed.Becausevisible lighthasafrequencyintherangeof430THzto770THzontheelectromagneticspectrum,ahighnumberofbitsmaybesentover thisbandwidth.

LI FIisn'tonlyaboutlightandLEDs;it'saplatformwithawiderangeofbenefitsandfeatures.ThisLI FIsubjectis aboutpullingthefiberoutoffiberopticsandtransmittingdatathroughanLED. ThisstudyprovidesanobjectiveoverviewofLI FI'soperation,benefits,andapplications.Thegoalofthisarticleistoprovidea methodfordatatransferthatisbothquickerandmoresecure.

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072

ThemajorgoalsofthisprojectaretodevelopandbuildaLI FI basedwirelessdatatransmitterandreceiver.VLCisusedto convertaudiofiles.Theuseoflightasacarriertosendandreceive audio data. The goal of this project is to create a data transmissionsystemthatisbothquickerandmoresecure.LI FItechnologyoffersthefollowingbenefits:fasterdatatransmission thanWI FI,easierandlessexpensivetoimplement,fasterdatatransferduetogreaterspeedoflightemittedbythelaser,high security due tolight restrictions,safe from electromagnetic interferences,cheap cost, portability. The data throughputfor internetapplicationsishigher,thereisalargelotofenergyreductioninindustrythatutilizesLI FIbasedequipment,anditruns onopticalbandsthatarenothazardouslikeRFspectrum.Asaresult,theLI FI basedtechnologyposesnohealthrisks.This methodhasawiderangeofusesBecauseoperatingroomsdonotallowWI FIbecauseitemitsdangeroussignals,LI FImaybe utilizedinavarietyofsectors,includinghospitalautomation.Wheretheusageofradiospectrumishighlyhazardous,LI FIaudio transmissioniscommonlyusedinpetrochemicalindustryautomation.BecauseWI FIandmanyotherformsofradiationare harmfultosuchvitalplaces,LI FIcanbeutilizedinpowerplants.Localizedadvertisingisfrequentlydonebybroadcastingover theLI FIchannelintosmallerdistances,anditmayalsobeutilizedinunderwatersystemsforvoicecommunicationsanddevice management.Securenetworkedmedicalequipment,patientaccounts,andotherinformationcanallbenefitfromLI FI.This systemmaybeutilizedinplacessuchasworkplaces,hotels,andotherplacesthatdemandstrongillumination.Asaresult,lasers andhigh intensityLEDlightsmaybothbeemployed.

Figure 1.2 Electromagneticspectrumshowingvisiblelightportion

Asaresult,therateinsidetheLI FIwillbegreater,andfasterspeedswillbeobtainedmorefrequently.Wecansendmany sortsofdataoveraWi FinetworkutilizingLI FI.ThemaingoalistodesignatransmitterandreceiverforaudiousingaLI FI configuration.

ThisarticledivesintothetransmitterandreceiverpartsofaudiotransmissionusingLI FItechnology.Therestofthepaperis arrangedinthefollowingmanner:AdescriptionofthecurrentsystemandablockdiagrammaybefoundinSection2.The

Figure 1.1. Electromagneticspectrumshowingvisiblelightportion

Figure 3.1. LASERLight Figure 3.2. Setupofcircuit Figure4depictsourcircuit'sconfiguration.Let'shavealookathowourcircuitnowoperates.We'reusingtheaudioporton thetransmitterendtosendaudiofromasmartphone,andtheaudiojack'soutputisconnectedtothelaserlight.Whenthelaser isconnectedtotheaudioinput,itwillbegintoglow,andtheemittedlightwillbecollectedbythesolarpanelonthereceiving end.Theoutputofthesolarpanelissuppliedintotheaudioamplifiercircuitasaninput,andtheoutputoftheLM386amplifieris connectedtoaspeakertoallowtheamplifiedanalogueaudiooutputtobereceived.Theaudiojackisusedsincetheaudiois © 2022, IRJET Impact Factor value: 7.529

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Togetclearaudiooutput,wecankeeptheLEDatamaximumdistanceof15 20cmfromthesolarpanel..BecauseLEDsare inexpensiveandwidelyavailable,thissystemcanbeimplemented;nevertheless,themaindisadvantage/drawbackofemploying LEDsisthattheirrangeislimited,whichnecessitatesalargesolarpanelareaandgreaterwattagepower.Datatransmission requiresanearorperfectline of sight,whichcanbeaffectedbyLED,naturallight,sunlight,andconventionalelectriclight.Asa result,inthesuggestedsystemofthisresearch,laserlightisusedinsteadofLEDs.

2. EXISTING SYSTEM

3. PROPOSED SYSTEM

Inputisananalogueaudiostreamfromasmartphoneconnectedtothelaserlightviaanaudioconnectiononthetransmitter side.Asolarpanelisinstalledatthereceiverendtocollectthesignal,whichisthenconnectedtoanaudioamplifiertoamplify theaudiodatareceived.Finally,aspeakerisattachedtotheamplifier'soutputsothattheanalogueaudiooutputcanbeheard.

Smart phone Audio jack Laser Solar panel Amplifier Speaker suggestedsystemisshowninSection3asablockdiagram.Section4iswhereyou'llfindtheconclusionandfuturescope.Section 5containsalistofsources.

Thefollowingarethelistofthecircuit'scomponents

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072

Figure 2.AudiotransmissionusingLi FibyLASER

TheLEDonthetransmitterwillflashwhenevera3.5mmaudiojackisattachedtoanaudiosource,suchasasmartphone,but theintensityofthelightwillnotchangewhenthephoneisswitchedoff.Assoonaswestartlisteningtotheaudio,we'llnotice thattheintensityofthelightchangesfrequently.Whenweturnupthevolumeonourphone,TheintensityoftheLEDlightvaries atapacethatisquickerthanthehumaneyecanprocess.LEDshaveawavelengthrangeof275to950nm,hencetheywillonly reachasmalldistance.Atthereceiverend,asolarpanelisinstalledthatissosensitivethatitcandetectslightchangesinintensity and,asaresult, the voltages at the solar panel's output vary. As a result, when the LED hits the panel, the voltage varies dependingonhowbrightthelightis.Thevoltagefromthesolarpanelisthenroutedintoanamplifier,whichamplifiestheaudio signalandoutputsitthroughthespeaker.TheaudiosignalisamplifiedusingtheICLM386audioamplifier.Aslongasthesolar panelisincontactwiththeLEDs,outputwillbeachieved.

ThisdocumentprovidesathoroughoverviewoftheaudiotransmissionsystemthatemploysLI FItechnology.Theconceptof LI FIiscurrentlygeneratingalotofbuzzallaroundtheworld.Thissystemisfrequentlyusedwiththisinfrastructureanddoes notrequiresignificantadjustments.Withinthesphereofwirelesscommunications,visiblelightcommunicationmaybearapidly ©

Figure 3.3: RealtimeapplicationsofLi Fi Figure 3.4: CircuitofProposedSystem

beingdeliveredviaasmartphone.Thisaudiojackconvertsthedigitalinputaudiofromthephonetoanalogue.Right,left,and neutralisthethreeoutputterminalsonthisaudiojack.Theselinescarrytheaudiooutputsignal.Inourproposedwork,wehave replacedtheLEDlightingwithalasersource,whichremovesthedrawbackofusingLEDbyspanninglargerdistancesofupto 15m.As a consequence, audio signals are transmitted free of interference and noise/disturbance,whiledatatransferspeeds surpass10Gbps.Asaconsequence,alaserisemployedasalightsourceinthisstudytoconveyaudiodatavialight.Someofthe advantagesofusingLI FItechnologyforaudiotransmissionareasfollows:ThedatarateinLI FIwillbeenhanced,resultingina quickerspeed.WewilluseLI FItosendanydatathatwouldusuallybesentoveraregularWI FInetwork.Highspeed,enhanced security,moreconnecteddevices,cheapcost,lowbiterrorrate,highefficiency,immunetoelectromagneticinterferences,and becauselaserisused,datatransferisconsiderablyfasterduetoitshighintensity,brightness,anddirectionality,withthelight reachinguptolongdistances.

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International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072

ThefollowingaresomeexamplesofLI FIapplicationsinvariousfields:WI FIandotherformsofradiationaredangerousto suchsensitiveareasinanumberofsituations,includinghospitalsandpowerplants.LI FIcanbeutilizedintheseenvironments. LI FIcanalsobeusedforaudiocommunicationsanddevicecontrolinunderwatersystems.Localizedadvertisingispossibleby broadcastingontheLI FIchannelovershorterdistances.LI FIcanalsobeutilizedintrafficcontrolsystemstodecreasevehicle to vehiclecommunication relatedaccidents.Ithasuseinpharmaciesandthepharmaceuticalindustry.LI FIcanassistshopsin directingcustomersfromthemomenttheyenterthestore.Itcanalsobeusedinaero planes.Intimesofcalamity,suchas earthquakes orhurricanes,LI FI is frequently used asa reliable means ofcommunication. This technology is employedin augmentedreality,anditishighlyusefulinmilitaryandnavalapplications,aswellasunderwaterapplicationsandcrypto currency.

5. CONCLUSION

Thistechnologyhasalotofpotentialinthefuture.BecauseLI FIisanewtechnology,ithasalotofpotential.Duringthisfield, numerousstudiesarefrequentlycarriedout.Inthiswork,weproposedareal timehigh qualityaudiosignaltransmissionand receivingsystem.LI FIisalow costandfastwirelesscommunicationtechnology.

Therisingneedforlargerbandwidths,quickerandsaferdatatransmission,aswellasequipmentthatisbothecologicallyand demonstrablyhuman friendly,heraldsthestartofadramaticchangeinwirelesstechnologyfromRFtooptical.AlthoughVLCis stillinitsearlystages,itisapromisingtechnologywithawiderangeofapplications.VLCisbecomingincreasinglypopular throughouttheworld,andwemaysoonseeaplethoraofreal worldapplications.Thisdevicecansenddataatarateofabout 100gigabitspersecond(100Gbps)utilizinglasers,whicharefarfasterthanradiowaves.Thisworkisregularlyimprovedinthe future by adding high intensity LEDs or focusing lenses in order to extend the range of communication. Adding a noise terminationcircuittothereceiverendcanhelpreduceoutputnoise.

4. FUTURE SCOPE

emergingtechnology.TheVLCisstillinitsearlyphases,butwiththegreatadvancesintechnologybeingmadestepbystage,it willsoonbeintegratedintoourdailylife.LI FIisaquickandlow costwirelessdatatransporttechnology.Therisingneedfor higherbandwidths,quickerandsaferdatatransfer,aswellastechnologythatisbothecologicallyanddemonstrablyhuman friendly,heraldsthestartofahugewirelessrevolution.Thistypeofrecentinventionisfrequentlypromotedasasafeand environmentallyfriendlytechnology.Itcanalsobeusedinhazardousenvironments,suchasthermalandatomicpowerplants, withoutcreatingelectromagneticinterference.Asaresult,LI FIcantaketheplaceofWi Fi.

5. GMadhuri,KAnjaliandRSakthiPrabha,(2020)Transmissionofdata,audioandtextsignalusingLI FItechnology. IOPconf.Series:materialsscienceandEngineering,872(1):1 7 6. SameerBinAli(2018),ImplementationissuesofLI FI,IJRET,6(9)SETS 2018Conferencepreceeding,p.1 3 7. ShwetaSagar,MuktiRawal,YuktiMutreja,SushilKumar(2018),ComparisonofAnalogandDigitalbasedVoice TransmissionSystemforVisibleLightCommunication,IJRET,5(10):1 3ICCCS 2017:IntConfOnComputational Intelligence,CyberSecurityAndSmartGrid 8. Vinnarasi,S.TAarthy,(2017),Transmissionofdata,audiosignalandtextusingLI FI,ICMSMT,872(2020):1 7,IOP conf.series:material 9. RevathiS,AiswaryaNJ,(2018),AudiotransmissionusingLI FI,internationaljournalofadvanceresearch,ideasand innovationsintechnology,4(2):2599 2603 10. Nischay,(2017),AreviewpaperonLI FItechnology,IJRERT,VIMPACT 17,conferencepreceeding,5(23):1 5. 11. LamyaI.Albraheem,Lamia.Alhudaithy,AfnanA.Aliaser,MuneerahR.Aldhafian,andGhadaM.Bahliwah,(2018), TowarddesigningaLI FIbasedhierarchicalIOTarchitecture,IEEEACCESS,6(2018):40811 40825.

12. SaranyaS,RagaviB,PavithraL,SusheelS,SrivarshaM,VishalV,(2021),Audiotransmissionusingvisiblelight communicationandLI FItechnology.6THInternationalConferenceonInventiveComputationTechnology(ICICT) (IEEE):19 24. AMaideenAbdhulkaderjeylani,BAchuthan,BArunkumar,MBoobalanandRLChiragsun,(2021),Underwater visiblelightcommunicationusingLI FI,Easychairpreprintno.5080. P.MBensonMansingh,G.SekarandT.JobyTitus,(2021),VehiclecollisionavoidancesystemusingLI FI,Intechopen Ubiquitiouscomputing1 15. 15. D.Kusuma,K.Nikitha,P.NagaSai,S.Maheshbabu,K.ManojKumarandJ.Jhansi,(2021),Transmissionofdataand audiosignalusingLI FItechnology,IntjournalofinnovativeResearchinScienceEngineeringTechnology,10(7): 9527 9530.

2. Rekha, R., Priyadarshini, C., Pooja, R., Prashanth, R. and Shetty, S.V., (2019) Li Fi based Data and Audio Communication,InternationalJournalofEngineeringResearch&Technology,8(5):558 561

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072

1. Jagadeeswari,B.,Anusha,C.S.,Monisa,D.andPreethi,M.,(2019)AudioTransmissionusingLi FiTechnology.IntJ ofTrendinScientificResearchandDevelopment3(3):1008 1011

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REFERENCES

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4. NandwanaS,DixitS,AudeechayaN,(2018)Li Fi(LightFidelity),NCETECE 14:NationalconferenceonEmerging trendsinElectronicsandCommunication,p.241 244.

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p ISSN: 2395 0072

Dr.Arun.SiscurrentlyworkingasAssistantProfessorintheDepartmentofElectronicsand Communication,CMRInstituteofTechnology,Bangalore.HecompletedhisB.EElectronicsand Communication from VLB Janakiammal College of Engineering and Technology under Anna University. His M.E Communication Systems was completed from Sri Krishna College of EngineeringandTechnologyunderAnnaUniversity.HepursuedhisPh.DFullTimefromPSG CollegeofTechnologyunderAnnaUniversityin2020.HisresearchinterestsincludeWireless Communication, Network Security, Cognitive Radio Networks etc. He has also served as AssistantProfessorinSriKrishnaCollegeofTechnology,Coimbatore.

MsSowmyaPiscurrentlyaFinalyearB.EElectronicsandCommunicationEngineeringstudentin HKBKCollegeofEngineering,Nagawara,Bengaluru.ShehascompletedherInternshipinEmbedded systems domain from Emertxe Information Technologies. Her internship project was based on WashingmachinesimulatorusingMPLABXIDEandPicsimlab.Shehascompletedherinternship basedonEmbeddedsystemsandIoRTfromEdGatetechnologiesPvtLtd,Bengaluru.Sheisanactive studentco ordinatorinCentreforResearchandDevelopment StudentClub(CORD SC)atHKBKCE. HertechnicalskillsincludesMATLAB,Keil,Cadence,Xilinx,Nctuns,EmbeddedC,Python,Verilogand DigitalSystemDesign.HerresearchinterestsincludeWirelessCommunications,SignalProcessing, Optimizationtechniques,EmbeddedsystemsandVLSIDesign.

BIOGRAPHIES

Dr. Sanjana Prasad is currently working as Associate Professor in the Department of ECE at HKBK CollegeofEngineering,Nagawara,BengaluruShecompletedherB.EinElectronicsandCommunication EngineeringfromNGPInstituteofTechnologyintheyear2013.ShegraduatedM.EinCommunication systemsfromBannariAmmanInstituteofTechnology,Sathyamangalam,Erodeintheyear2015.She completed her Ph.D. (Full time) in Information and Communication Engineering, Anna University, Chennaiintheyear2020.ShehasresearchexperienceinthefieldofWirelessCommunicationsand teachingexperienceatPSGCollegeofTechnology,Coimbatore.HerresearchinterestsincludeWireless Communications,Beyond5GNetworks,SignalProcessing,Optimizationtechniques,5GTechnologyand ArtificialIntelligence.

Ms. Syeda Husna Mohammadi is currently working as Assistant Professor at HKBK College of Engineering,Bengaluru.ShehascompletedherM.TechinDigitalElectronicsandCommunication fromMSRamaiahInstituteofTechnology.Shehas16yearsofteachingexperience. Herresearch interestsincludeDigitalElectronics,Communication,Embeddedsystems,VLSIDesign,andImage Processing.

Mr.SumithMandolkariscurrentlyaFinalyearB.EElectronicsandCommunicationEngineering studentinHKBKCollegeofEngineering,Nagawara,Bengaluru.HehascompletedhisInternshipin EmbeddedsystemsdomainfromEmertxeInformationTechnologiesandcompletedprojecton MicrowaveovensimulatorusingMPLABXIDEandPicsimlab.Hehascompletedhisinternship basedonEmbeddedsystemsandIoRTfromEdGatetechnologiesPvtLtd,Bengaluru.Heisan activestudentco ordinatorinCentreforResearchandDevelopment StudentClub(CORD SC)at HKBKCE.HistechnicalskillssuchasMATLAB,Keil,Cadence,Xilinx,Nctuns,EmbeddedC,Python, Verilog and DSD. His research interests include Wireless Communications, Signal Processing, Optimizationtechniques,EmbeddedsystemsandVLSIDesign.