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1、WhatisSoftwareDefinedRadioWiththeexponentialgrowthinthewaysandmeansbywhichpeopleneedtocommunicate-datacommunications,voicecommunications,videocommunications,broadcastmessaging,commandandcontrolcommunications,emergencyresponsecommunications,etc.–modifyingradiodeviceseasilyandcost-effective
2、lyhasbecomebusinesscritical.Softwaredefinedradio(SDR)technologybringstheflexibility,costefficiencyandpowertodrivecommunicationsforward,withwide-reachingbenefitsrealizedbyserviceprovidersandproductdevelopersthroughtoendusers.SoftwareDefinedRadio-Defined:Anumberofdefinitionscanbefoundtodesc
3、ribeSoftwareDefinedRadio,alsoknownasSoftwareRadioorSDR.TheSDRForum,workingincollaborationwiththeInstituteofElectricalandElectronicEngineers(IEEE)P1900.1group,hasworkedtoestablishadefinitionofSDRthatprovidesconsistencyandaclearoverviewofthetechnologyanditsassociatedbenefits.1SimplyputSoftw
4、areDefinedRadioisdefinedas:"Radioinwhichsomeorallofthephysicallayerfunctionsaresoftwaredefined"Aradioisanykindofdevicethatwirelesslytransmitsorreceivessignalsintheradiofrequency(RF)partoftheelectromagneticspectrumtofacilitatethetransferofinformation.Intoday'sworld,radiosexistinamultitudeo
5、fitemssuchascellphones,computers,cardooropeners,vehicles,andtelevisions.Traditionalhardwarebasedradiodeviceslimitcross-functionalityandcanonlybemodifiedthroughphysicalintervention.Thisresultsinhigherproductioncostsandminimalflexibilityinsupportingmultiplewaveformstandards.Bycontrast,softw
6、aredefinedradiotechnologyprovidesanefficientandcomparativelyinexpensivesolutiontothisproblem,allowingmulti-mode,multi-bandand/ormulti-functionalwirelessdevicesthatcanbeenhancedusingsoftwareupgrades.SDRForumGeneralizedFunctionalArchitecture–Commercial(source:http://www.sdrforum.org/pages/d
7、ocumentLibrary/documents/SDRF-01-P-0006-V2_0_0_BaseStation_Systems.pdf)1http://www.sdrforum.org/pages/documentLibrary/documents/SDRF-06-R-0011-V1_0_0.pdfSDRdefinesacollectionofhardwareandsoftwaretechnologieswheresomeoralloftheradio’soperatingfunctions(alsoreferredto
