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1、674IEEETRANSACTIONSONVEHICULARTECHNOLOGY,VOL.50,NO.3,MAY2001OntheAccuracyofCellularMobileStationLocationEstimationMaurizioA.Spirito,Member,IEEEAbstract—Thispaperanalyzestheaccuracyofthemultilatera-surementsisaddressedin[16].Performanceoftrackingalgo-tiontechniquesofpossibleapplicatio
2、ninmobilecommunicationsrithmsthatprocessabsoluteand/orrelativepropagationdelaynetworks.AgeneralmathematicalframeworkincludingallthemeasurementsinaGSMnetworkareaddressedwithsimula-multilaterationtechniquesthatprocessabsoluteand/orrelativetionsin[17]–[19]andverifiedexperimentallyin[20]
3、and[21].distancemeasurementsbetweenthemobilestationandmultiplebasetransceiverstationsisintroduced.Basedonthisscheme,References[22]and[23]addressthroughsimulationtheperfor-ageneralmeasureofpositioningaccuracyisfirstderivedandmanceachievedinanevolutionofaGSMnetworkbasedonthethenanalyze
4、dinthespecialcasesdefinedbythreetechniquesofEnhancedDataratesforGSMEvolution(edge)concept.possibleimplementationinGSM-basedsystems.AgeometricalUpuntilnow,standardizationofMSpositioninghasbeeninterpretationoftheformulasthatdefinethelocationaccuracymostlyfocusedontheGSMstandard,whichis
5、atthebasisofandacomparisonbetweenthetechniquesfromthegeometricconditioningpointofviewarealsogiven.theworldwideGSM900,GSM1800,andNorthAmericanPer-sonalCommunicationSystem(PCS1900).ActivitiesbeganinIndexTerms—E-911,enhancedobservedtimedifference1995withintheEuropeanTelecommunicationsSt
6、andardsInsti-(E-OTD),geometricdilutionofprecision(GDOP),GSM,intelligenttransportationsystems(ITS),location-basedservices,multilat-tute[24]afterEuropeanoperatorsaskedforcommercialappli-eration,observedtimedifferenceofarrival-idleperioddownlinkcations,andseparatelywithinT1P1intheUnited
7、Statesafterthe(OTDOA-IPDL),timeadvance,timedifferenceofarrival(TDOA),FCCestablishedtheE-911requirements.1In1997,theT1P1.5timeofarrival(TOA),UniversalMobileTelecommunicationssubcommitteeofT1P1wasgiventheresponsibilitytoleadtheSystem(UMTS),uplinkTOA,weightedleastsquares(WLS),standardiz
8、ationactivit
