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1、萬方數(shù)據(jù)傳感器與儀器儀表<微計(jì)算機(jī)信息>(測控自動化)2009年第25卷第2-1期文蕈編號:1008-0570(2009)02一l-014枷3ResearchofTargetLocalizationAlgorithmsBasedonWirelessSensorNetwork(AirForceRadarAcademy)CHENXiang—pingFANGLiAbstract:WirelessSensorNetworkisanoveltechnologyacrossmulti—subject.Ithasbroadapplicationinsurroundingsmeas
2、ure,re—motesensing,targetlocalizationandsoon.Thepaperanalyzesseveralmaintargetlocalizationalgorithmsatpresent,proposestheimprovedmeasureoflocalizationalgorithmbasedonseeingandhearingmeasure,whichishelpfulforfurtherresearch.Keywords:WirelessSensorNetwork;targetlocalization;Algorithm1Int
3、roductionWireless8enornetworkisapopularnetworktechnologytheseyears.Itismadeupofnlas8littlevolumeandlowcostsensornodes,whichintegratesensor,datacollection,handlingandwire-lesscommunicationunit.Itisanintelligentsystemofcompletingmissionintermsofenvironmentautomatically.Eachnodecande-teet
4、environmentaroundindependently,thencooperateseachothertorealizecomplicatefunctions,suchintrusiondetection,targettracingandlocalization,environmentdetectionandremotesensing.WirelesssenornetworkCallbeusedingeophysics(earthquakede-tectionforexample),militarysystem,emergencyandrescuing,tra
5、fficdetection,biologyresearchetc,thesefieldsusuallylackofsupportofconventionalnetworkinfrastructure0nternet,GPSandmobilecommunicationnetworketc).Targetlocalizationmeansthatestimatinglocationofdetectedtargetinwirelesssensornetworkatsometime.Accordingtothedifferenceofsignaldetectionunit,
6、atpresenttargetlocalizational-gorithmsmainlyhavelocalizationalgorithmbasedonTOAestima-tion,localizationalgorithmbasedonTDOAestimationandlocal-izationalgorithmbasedonDOAestimationetc.Whilethesealgo-rithmshavesomeshortcomingsandneedtobefurtherresearchedandimproved.Thispaperanalyzessevera
7、lordinaryalgorithms,andimproveslocalizationalgorithmbasedonseeingandhearingesti-mation.2Analyseoflocalizationalgorithm"2.1localizationalgorithmbasedonTOAestimationLocalizationalgorithmbasedonTOA(timeofarrival,TOA)estimationmainlyhascirclelocalizationandgloballocalization.Figure1shows