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20068JournalonCommunicationsAugust2006278Vol.27No.8IGSO1211.2100072.410073IGSO23IGSOIGSOGEOIGSOGEOIGSOIGSOTN927.23A1000-436X(2006)08-0148-07StudyontheapplicationofIGSOintomobilesatellitecommunicationZHANGGeng-xin1,LISu-dan2,GANZhong-min1(1.InstituteofCommunicationEngineering,PLAUniversityofScienceandTechnology,Nanjing210007,China;2.SchoolofComputer,NationalUniversityofDefenseTechnology,Changsha410073,China)Abstract:Therelatedcoverageperformance,Dopplershiftandservice-supportingcapabilityoftheIGSOconstellationwasstudiedforthegivenarea.Theresultsshowthat,theconstellation,whichconsistsoftwoorthreeIGSOsatellites,canachievegoodcoveragecharacteristics(thepercentoftimeofoneandmoresatellitescoverageandaverageelevationan-gle)totheChineseandnearbyareawithsmallDopplershift.Thelinkbudgetshowsthat,adoptingIGSOcaneffectivelysolvethelowelevationangleproblemfacedbyGEOsatellite,andsimilarperformance,whichcanonlybeimplementedbyaverybigGEOsatellite,canbeachievedbytwoorthreerelativelysmallIGSOsatellites.SothesolutionofadoptingIGSOtoprovidemobilesatellitecommunicationsystemistechnicallyfeasible.Keywords:satellitecommunication;mobilesatellitecommunication;Dopplershift;IGSO;satelliteantennadiameter;fadingmargin1GEO[1~6]GEO42.2%InmarsatMSATN-STAROptusACeSThurayaGEOGEO2005-12-152006-06-1560472049,60472051([2005]383)FoundationItems:TheNationalNaturalScienceFoundationofChina(60472049,60472051);TheScientificResearchFoundationfortheReturnedOverseasChineseScholars,StateEducationMinistry(SEM[2005]383)baidu8IGSO·149·[1,2]1)2)3)4)5)6)GEOGEO(IGSO)GEOIGSOGEO08”8”IGSO8”IGSOGEOIGSOGEO[5][6]IGSOIGSO2IGSO2.1IGSO3RAANRAANIGSOIGSOIGSO118°STKIGSO23IGSO1)10°2)3)118°4)[0°~90°][70°~50°]2°10°2.22IGSO2IGSO20°180°RAAN218.7°38.7°1230°55°0°12-IGSO(30)330°55°·150·27118°GEOGEOIGSO22-IGSO(55)32-IGSO13222.33IGSO30°120°240°RAAN218.7°98.7°338.7°3IGSO118°120°4530°55°43-IGSO3053-IGSO5530°55°100%25°100%50°50°55°IGSO40°100%75°50°230°IGSO55°IGSO35°630°55°63-IGSO8IGSO·151·3IGSO23IGSO232223IGSOIGSO22-IGSO3-IGSOIGSO86164s37~91.6GHzIGSOIGSOIGSO2-IGSO2000Hz3-IGSO1000HzIGSO7894GEOIGSO4.1·152·270ff(/)[EIRP](/)[][][][]CnGTkLLM=+−−−−(dB·Hz)(1)[EIRP](dBW)[G/T](dB/K)[k](=−228.6dBW/K)[Lf](dB)[L]()(dB)[Mf](dB)1EIRPEb/N0G/TG/TEIRP4.2[2,7,8][2](CEFM)GEOIGSO(,,)(,)ln(,)MPfafpCfθθθ=+(dB)(2)θ(°)20°80°f1.5~10.5GHzP1%20%(,,)MPfθ:θPf(dB)2(,)0.0020.150.20.7(,)0.331.527.2affCffθθθθθ⎧=−−−⎨=−++⎩(3)11.6435GHz4.1GEO3IGSO2IGSO60°1CEFM/dB(=1.6435GHz)99%95%90%80%20°23.117.915.613.440°16.510.37.65.060°9.95.33.41.44.3GEOIGSO235W15W2/dBi/K/WG/T/(dB·K−1)EIRP/dBW13501−24.4163005/15−18.813/17.83/MHz1643.515422.42.464384/(kbit·s−1)3842048Eb·N0−1/dB7()/50(GEO)60(IGSO)99%(GEO)95%(IGSO)/dBCEFM/dB0(GEO)2(IGSO)/dB4()45642G/TEIRP//568IGSO·153·42(G/T)/dB·K−1/mEIRP/dBW/WGEOIGSOGEOIGSOGEOIGSOGEOIGSO16.56.511.23.641.331.30.70.74.5−5.52.80.935.625.62.92.952(G/T)/dB·K−1/mEIRP/dBW/WGEOIGSOGEOIGSOGEOIGSOGEOIGSO30.820.858.018.463.353.34.14.118.88.814.64.657.647.717.417.562(G/T)/dB·K−1/mEIRP/dBW/WGEOIGSOGEOIGSOGEOIGSOGEOIGSO21.811.820.66.564.954.946.346.71)(C/no)C/noEIRPG/TC/no2)GEOIGSO3)6dB4)60%500K5)GEO50°99%13.2dB3IGSOIGSO5.3dBIGSO60°95%IGSO40°8099%6)IGSO2dB1)GEO11mIGSO3.6m18.4m2)GEOIGSO36.5m5GEOIGSO21)IGSOGEO2)IGSOGEOIGSOGEO3)IGSO·154·271967-1937-1973-1962-4)2IGSO3IGSO5)IGSOIGSOGEOIGSOIGSOGEO[1].[J].2005,(7):24-27.ZHANGGX,GANZM.DevelopmentstrategyofChinesemobilesatellitecommunicationsystems[J].DigitalCommunicationWorld,2005,(7):24-27.[2],.[M].:,2001.ZHANGGX,ZHANGH.MobileSatelliteCommunicationSys-tem[M].Beijing:PostandTelecommunicationPress,2001.[3]DANKBERGM,MILLERM,SULLIVANW,etal.ARobustSatel-liteSystemArchitecturefortheMobileUserObjectiveSystem[S].IEEE0-7803-5538-5/99,1999.[4]OHMORIS,WAKANAH,KAWASES.MobileSatelliteCommuni-cations[M].USA:ArtechHouse,1998.[5]ATIAA,DAYS,WESTERLUNDL.Communicationssatelliteopera-tionininclinedorbit'thecomsatmaneuver[A].ProceedingsofAIAA13thInternationalCommunicationSatelliteSystemsConferenceandExhibit[C].LosAngeles,USA,1990.452-455.[6]KANAIH,URASAKIS,CHIBAI,etal.Inclinedgeosynchronous(I-GEO)communicationssatelliteforasiapacificregion[A].Proceed-ingsofAIAA17thInternationalCommunicationsSatelliteSystemsConferenceandExhibit[C].Yokohama,Japan,1998.200-204.[7]JOHANNSENK.MobileP-servicesatellitesystemcomparison[J].Interna-tionalJournalofSatelliteCommunications,1995,13(6):453-471.[8]VOGELW,GOLDHIRSHJ.MultipathfadingatL-bandforlowelevationangle,landmobilesatellitescenarios[J].IEEEJournalonSelectedAreasinCommunications,1995,13(2):197-204.1471970-1967-1980-