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基于RSSI测距的室内三边定位算法实现研究(英文) Introduction: WirelessSensorNetwork(WSN)playsavitalroleincollectingandtransmittingdatainvariousfields.Inrecentyears,thelocalizationtechnology,whichisoneofthemostimportantapplicationsofWSN,hasattractedmoreandmoreattention.Withthedevelopmentofindoorpositioningtechnology,thelocalizationofmobiletargetsinanindoorenvironmenthasbecomeoneofthemostimportantresearchtopics.Duetothecomplexityofindoorenvironments,traditionalGPSpositioningtechnologiescannotperformwellintheindoorapplication.Therefore,itisnecessarytodevelopnewpositioningalgorithmsthataresuitableforindoorenvironments. OneofthecommonlyusedpositioningtechnologiesinindoorenvironmentsisbasedontheReceivedSignalStrengthIndicator(RSSI).RSSIisusedtoestimatethedistancebetweenmobiletargetsandfixedbeacons.However,traditionalRSSI-basedpositioningalgorithmshavelowaccuracyandcannotfullymeettherequirementsofpracticalapplications. Inthispaper,weproposeathree-sideindoorlocalizationalgorithmbasedonRSSI.TheproposedalgorithmcaneffectivelycalculatethepositionofmobiletargetsbyusingthemeasuredRSSIvaluesoffixedbeacons.Therestofthepaperisorganizedasfollows:Section2summarizestherelatedworkonindoorlocalizationtechnology.Section3introducesthetheoreticalbasisoftheproposedalgorithm.Section4presentstheimplementationprocessandexperimentalresultsofthealgorithm.Section5concludesthepaperanddiscussespossiblefutureresearchdirection. RelatedWork: Indoorpositioningtechnologyhasattractedalotofattentionfromresearchers.Manylocalizationalgorithmshavebeendevelopedtoimprovethepositioningaccuracy.SomecommonlyusedindoorlocalizationtechnologiesincludeUltraWideBand(UWB),BluetoothLowEnergy(BLE),ZigBee,andRSSI.RSSI-basedpositioningalgorithmshavebeenextensivelystudiedduetoitslowhardwarecostandsimpleimplementation. TraditionalRSSI-basedpositioningalgorithmssufferfrommanylimitations,suchasthemulti-patheffect,radiointerference,andsignalattenuationduetolargedistances.Researchershaveproposedmanyimprovedalgorithmstoovercometheselimitations,suchasK