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FPGA和DSP间基于SRIO的高速通信系统设计.docx

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FPGA和DSP间基于SRIO的高速通信系统设计 Introduction Field-ProgrammableGateArrays(FPGAs)andDigitalSignalProcessors(DSPs)aretwopopulartypesofdevicesusedindesigningdigitalcommunicationsystemsduetotheirhighflexibility,reprogrammability,andprocessingpower.FPGAisaprogrammablelogicdevicethatcanbeprogrammedtoperformawiderangeofdigitalfunctions,whileDSPisdesignedtoperformdigitalsignalprocessingoperationseffectively.Inthispaper,wepresentasystemdesignforhigh-speedcommunicationbetweenFPGAandDSPusingSerialRapidIO(SRIO)asthecommunicationprotocol. Background RapidIOisahigh-speedinterconnectprotocoldesignedforcommunicationbetweendifferentprocessortypes,suchasprocessors,DSPs,andFPGAs,thatarecommonlyusedindigitalcommunicationsystems.Itoffershighthroughputandlowlatencycommunicationbetweenprocessingelements.RapidIOcanoperateatspeedsupto40Gbps,whileSRIO,asubsetofRapidIO,supportspoint-to-pointcommunicationlinksatspeedsofupto20Gbps. SystemDesign ThesystemarchitectureconsistsofanFPGA-basedcommunicationmoduleandaDSP-basedsignalprocessingmodule.TheFPGAmoduleisusedtointerfacewiththeexternalworldthroughahigh-speedSRIOlink,whichprovidesfastcommunicationofdatabetweentheFPGAandDSPmodules.TheDSPmoduleperformsreal-timedigitalsignalprocessingontheincomingdataandreturnstheprocesseddatatotheFPGAmodulethroughtheSRIOlinkfortransmissiontotheexternalworld. Thesystemoperatesinthefollowingmanner:theFPGAmodulereceivesdatafromanexternalsource,suchasasensorortransceiver.Theincomingdataispreprocessed,suchasfiltering,noisereduction,andcompressionbeforetransmissiontotheDSPmoduleforfurtherprocessing.TheDSPmoduleprocessesthedata,suchasmodulation,demodulation,datacompression,errorcorrection,orequalization,dependingontheapplication.TheprocesseddataisthenreturnedtotheFPGAmodulefortransmissiontotheexternalworld.TheFPGAalsocontrolsandmanagesthecommunicationbetweentheFPGAandDSPmodules. FPGAModuleDesign TheFPGAmoduleinterfaceswiththeexternalworldthroughahigh-speedserialinterface,suchasSRIO.ThemoduleincludesaSERDESmodule,whichdrivessign