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1、云南大学学报(自然科学版)1998,20(5):329~332CN53-1045/NISSN0258-7971JournalofYunnanUniversityTheAnalyzingofKeyTechniquesforSoftwareRadioShenDongyaZhenChangquanZhenWenxing(DepartmentofInformationandElectronicScience,YunnanUniversity,Kunming,Yunnan,650091)Abstra
2、ctThispapercomparessoftwareradiowithtraditionalreceiverfirstly,thendiscussedthearchitecturead-vancedfeaturesandapplicationsofsoftwareradioindetails.Furthermore,thekeytechniquesanditsfunctionsforsoft-wareradioareproposed.Finally,techniquedifficultiescu
3、rrentstatusonADC,DSP,andRFfrontendarechieflyana-lyzedandstudied.Keywordssoftwareradio,ADC,DSPSincetheinventionofthesuperheterodynere-[3]speakeasy.Celullartelephonestandards,Pagingceiverintheearlythiscentury,radioarchitecturehassystems,mobilesatellit
4、etelephonestandards,PCS,remainedremarkablyunchanged.WhileitistrueWirelessdataandmobileradiostandardshaveallthatdevelopmenthasnotstoodstillincreasingin-beenanalyzedforpotentialinclusioninthespeakeasytegration,evermoresophisticateddevices,andthesoftware
5、suite.Mostofthesewaveformswillbeableuseofdigitalcircuitrytoimplementbasebandfunc-tobeimplementedthroughtheinclusionofsoftwaretionsarejustsomeexamplesoftechnologicalad-thusproducingatrulymultimodeandmultimediavancementitisalsotruethatnoneofthesedeve-lb
6、usinesssystem.opmentscanbesaidtohaverevolutionizedtheorig-iSoftwareradiomakesafeatureofstandardiza-nalconcept.Itseemshowever,thatsucharevolutiontion,modularzation,versatility.Anadditionalbenefitmayalreadybeinprogress,intheguiseoftheso-istheabilitytoeas
7、ilyupgradethesystemwhencom-calledsoftwareradio.municationsstandardschangeorevolve.Therefor,it[1]Softwareradio,firstpresentedbyJoeMitola,isofgreatvaluetomilitaryservicesbutofmuchanAmerican,ismainlyappliedtomilitaryservicesgreattomobilecommunicationsyste
8、mswhicharewhichhave,overtheyears,developedmanykindsofconfrontedwithalotofnewstandardsandenviron-radios,eachhavingaspecialpurposeand,usually,notments.interoperablewitheachother.Tosolvethisinterop-Softwareradioisoftwoadvantages:flexibilit
