High Performance Software Radio.pdf

《High Performance Software Radio.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、Sora:HighPerformanceSoftwareRadioUsingGeneralPurposeMulti-coreProcessorsKunTan†JiansongZhang†JiFang‡HeLiu§YushengYe§ShenWang§YongguangZhang†HaitaoWu†WeiWang†GeoffreyM.Voelker†MicrosoftResearchAsia,Beijing,China§TsinghuaUniversity,Beijing,China‡BeijingJiaotongUniversity,Beijing,ChinaUCSD,LaJolla,

2、USAAbstractbeddedarchitecture,oftenwithoutthesupportofarichdevelopmentenvironmentofprogramminganddebug-ThispaperpresentsSora,afullyprogrammablesoft-gingtools.Hardwareplatformscanalsobeexpensive;wareradioplatformoncommodityPCarchitectures.theWARP[6]educationalprice,forexample,isoverSoracombinesthep

3、erformanceandfidelityofhardwareUS$9,750.SDRplatformswiththeprogrammabilityandflexibil-ityofgeneral-purposeprocessor(GPP)SDRplatforms.Incontrast,SDRplatformsbasedongeneral-purposeSorausesbothhardwareandsoftwaretechniquestoad-processor(GPP)architectures,suchascommodityPCs,dressthechallengesofusingPCar

4、chitecturesforhigh-havetheoppositesetoftradeoffs.Developerspro-speedSDR.TheSorahardwarecomponentsconsistofgramtoafamiliararchitectureandenvironmentusingaradiofront-endforreceptionandtransmission,andsophisticatedtools,andradiofront-endboardsforin-aradiocontrolboardforhigh-throughput,low-latencyterf

5、acingwithaPCarerelativelyinexpensive.How-datatransferbetweenradioandhostmemories.Soraever,sincePChardwareandsoftwarehavenotbeenmakesextensiveuseoffeaturesofcontemporaryproces-designedforwirelesssignalprocessing,existingGPP-sorarchitecturestoacceleratewirelessprotocolprocess-basedSDRplatformscanach

6、ieveonlylimitedperfor-ingandsatisfyprotocoltimingrequirements,includingmance[1,22].Forexample,thepopularGNURadiousingdedicatedCPUcores,largelow-latencycachestoplatform[1]achievesonlyafewKbpsthroughputonanstorelookuptables,andSIMDprocessorextensionsfor8MHzchannel[21],whereasmodernhigh-speedwire-hig

7、hlyefficientphysicallayerprocessingonGPPs.Us-lessprotocolslike802.11supportmultipleMbpsdataingtheSoraplatform,wehavedevelopedademonstra-ratesonamuchwider20MHzchannel[7].Thesecon-tionradiosystemcalledSoftWiFi.SoftW