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基于CC2530的室内定位系统设计与实现 Title:DesignandImplementationofanIndoorLocalizationSystemBasedonCC2530 Abstract: Indoorlocalizationsystemshavegainedconsiderableattentionduetotheirpotentialapplicationsinvariousdomains,suchasassettracking,securitymonitoring,andlocation-basedservices.ThispaperpresentsthedesignandimplementationofanindoorlocalizationsystembasedonCC2530,anIEEE802.15.4compliantSystem-on-Chip(SoC).ThesystememploysaBluetoothLowEnergy(BLE)beaconinfrastructurecombinedwithtrilaterationtechniquestoaccuratelydeterminethelocationofmobiledeviceswithinanindoorenvironment.Themaincontributionsofthisresearchincludethedesignofthehardwareandsoftwarecomponentsofthesystem,aswellastheevaluationofitsperformancethroughexperimentalmeasurements. 1.Introduction: IndoorlocalizationisachallengingtaskduetotheabsenceofGPSsignalsinindoorenvironmentsandthepresenceofobstaclesthataffectwirelesssignalpropagation.Varioustechniqueshavebeenproposedtoaddressthisissue,includingfingerprinting,receivedsignalstrength(RSS)monitoring,andtime-of-flightmeasurements.Inthispaper,wefocusontrilaterationtechniquesbasedonBLEbeacons. 2.SystemDesign: Theindoorlocalizationsystemiscomposedoftwomaincomponents:theCC2530-basedBLEbeaconsandthemobiledevicesbeinglocalized.TheBLEbeaconsarestrategicallyplacedthroughouttheindoorenvironmenttoprovidereferencepointsforlocalization.Themobiledevices,equippedwithBLEreceivers,continuouslyscanforbeaconsignalsandestimatetheirdistancesfromeachbeaconusingRSSmeasurements. 3.BLEBeaconInfrastructure: TheBLEbeaconsaredesignedusingtheCC2530SoCandprogrammedtotransmitperiodicbroadcastpacketscontainingtheiruniqueidentifier,signalstrength,andbatterystatus.Thebeaconsignalsarereceivedbythemobiledevicesandusedfordistanceestimation.Thebeaconinfrastructureiscarefullydeployedtoensuresufficientsignalcoverageandminimalinterference. 4.TrilaterationAlgorithm: Todeterminethelocationofamobiledevice,atrilaterationalgorithmisemployed.Thisalgorithmutilizestheestimateddistancesfromatleastthreebeaconstocomputethede

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