modulation scheme efficiency study调制方案的效率研究

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1、38ghzModulationschemeefficiencystudychristopherpratt,ra2ftsluRADIOCOMMUNICATIONSAGENCYDate23rdJanuary2001DocumentReferenceprRSWG01010020MeetingFLCCPolicyMeetingWorkingPaperNo:RSWG(01-01)/002MODULATIONSCHEMEEFFICIENCYSTUDYUsingComputerSimulationToDetermineTheSpectralEfficiencyOfModulation

2、SchemesChristopherPrattRA2/FTSLU-21-38ghzModulationschemeefficiencystudychristopherpratt,ra2ftslu-21-38ghzModulationschemeefficiencystudychristopherpratt,ra2ftsluABSTRACTAstudywasconductedtofindtherelativespectralefficiencyoffourmodulationschemesinthe38GHzband.Thestudywasconductedbyadapt

3、ingacomputerprogramtorandomlyplacelinksinasampleareasubjecttothefrequencyassignmentcriterialaidoutinRA350.Thefactorsusedtodeterminespectralefficiencywerethemaximumlinkdensityinthesamplearea,andthebitrateandbandwidthforeachlink.Thereportindicatesthathighermodulationschemesprovidebetterspe

4、ctralefficiencyinboththesinglenodeandmultiplenodecasesthatwereinvestigated.-21-38ghzModulationschemeefficiencystudychristopherpratt,ra2ftsluTABLEOFCONTENTS1.INTRODUCTION02.AIMSANDOBJECTIVES03.SATURATIONSIMULATION0channeldata0linkplacement0programoperation04.SIMULATIONTESTS0singlenodesimu

5、lation0multiplenodesimulation0placementfailuresvslinksplaced05.RESULTSANDANALYSIS0singlenodesimulation0multiplenodesimulation0placementfailuresvslinksplaced06.CONCLUSION0-21-38ghzModulationschemeefficiencystudychristopherpratt,ra2ftslu1.INTRODUCTIONAstheradiospectrumintheUKbecomesmoreand

6、morecongested,thereisanincreasingneedformorespectrallyefficientlinks.Firstlytoenablelinkstobeassignedinplaceswhereithithertowouldnothavebeenpossible,andsecondlytominimisethepossibleinterferencetofuturelinksinthesurroundingarea.Newtechnologicaladvancesareallowinghigherordermodulationequip

7、menttobeproduced–allowinghigherdataratestobetransmittedinbandwidthcurrentlyusedformediumratetraffic.Thisisclearlyadvantageousinthecasewherethesignalisconfinedinamediumwhereitcannotinterferewithorbecorruptedbyothersignalse.g.inthecaseofanopticalfibrelink.Butthebenefitsaren