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1、DIMACSTechnicalReport99-275/29/99EfficientRadioWaveFrontPropagationforWirelessRadioSignalPrediction1byGregPerkinsDianeSouvainegperkins@paul.rutgers.edudls@cs.rutgers.eduDepartmentofComputerScience,RutgersUniversity,Piscatawy,NJ088551ResearchsupportedinpartbyDIMACSNSFGrant#NCR-9527163.Diane
2、Souvaine’scurrentaddressis:EECSdept.,TuftsUniversity,Medford,MA02155,dls@eecs.tufts.eduDIMACSisapartnershipofRutgersUniversity,PrincetonUniversity,AT&TLabs-Research,BellLabs,TelcordiaTechnologies(formerlyBellcore)andNECResearchInstitute.DIMACSisanNSFScienceandTechnologyCenter,fundedunder
3、contractSTC–91–19999;andalsoreceivessupportfromtheNewJerseyCommissiononScienceandTechnology.ABSTRACTDuetotheeverincreasingcomplexityofwirelessnetworkdesign,wirelessnetworksimulationengineshavebecomeanecessarytoolforwirelessnetworkengineers.Asignal-strengthpredictionsystemliesatthefoundat
4、ionofeverywirelesssimulator,makingsignal-strengthpredictionformicrocellsandpicocellsanimportantresearchtopicintheradiofield.Efficientandaccuratemethodsareneededforuseincurrentwirelessnetworkdesignandfuturewirelessnetworkresearch.Thispaperdescribesasystem,PREDICT,designedforuseinwirelessradi
5、osignalpredictionresearch.PREDICTtrackstheexpansionofatransmitter’swavefrontbymodelingthewavefrontasaneverexpandingspherecentereduponthetransmitter.Thesphere’sexpansionistrackedbydiscretizingthesphere’ssurfacewithatriangu-lationandthenpropagatingeachtriangularwavefrontthroughtheenvironme
6、nt.Inthepropagationpredictionofthesetriangularwavefronts,PREDICTsupportsre-flection,transmissionanddiffractionbaseduponthegeometricoptics(GO)modelofelectromagneticwaves.Signalpredictionisperformedthroughaspecialsummationofthepredictedmulti-pathatareceiver.PREDICT’salgorithmshavebeenspecific
7、allydesignedforuseinradiosignalpre-diction.ThecurrentenvironmentssupportedbyPREDICTareurbanwithflatorvariedterrainandasinglefloorofabuilding,whereallobstaclesintheenvironmenthaveverticalorhorizontalwalls.Thesystemdesignisflexible,allowingPREDICTtobeexpandedforuseinmanydiffere
