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附件D：译文原文重庆大学本科学生毕业设计（论文）附件DPAGE\*MERGEFORMAT28DPAGE\*MERGEFORMAT29附件D：FPGAIMPLEMENTATIONOFDIGITALFILTERSChi-JuiChou,SatishMohanakrishnan,JosephB.EvansTelecommunications&InformationSciencesLaboratoryDepartmentofElectrical&ComputerEngineeringUniversityofKansasLawrence,KS66045-2228ABSTRACTDigitalfilteringalgorithmsaremostcommonlyimplementedusinggeneralpurposedigitalsignalprocessingchipsforaudioapplications,orspecialpurposedigitalfilteringchipsandapplication-specificintegratedcircuits(ASICs)forhigherrates.Thispaperdescribesanapproachtotheimplementationofdigitalfilteralgorithmsbasedonfieldprogrammablegatearrays(FPGAs).TheadvantagesoftheFPGAapproachtodigitalfilterimplementationincludehighersamplingratesthanareavailablefromtraditionalDSPchips,lowercoststhananASICformoderatevolumeapplications,andmoreflexibilitythanthealternateapproaches.SincemanycurrentFPGAarchitecturesarein-systemprogrammable,theconfigurationofthedevicemaybechangedtoimplementdifferentfunctionalityifrequired.OurexamplesillustratethattheFPGAapproachisbothflexibleandprovidesperformancecomparableorsuperiortotraditionalapproaches.1.INTRODUCTIONThemostcommonapproachestotheimplementationofdigitalfilteringalgorithmsaregeneralpurposedigitalsignalprocessingchipsforaudioapplications,orspecialpurposedigitalfilteringchipsandapplication-specificintegratedcircuits(ASICs)forhigherrates[9,14].Thispaperdescribesanapproachtotheimplementationofdigitalfilteralgorithmsonfieldprogrammablegatearrays(FPGAs).RecentadvancesinFPGAtechnologyhaveenabledthesedevicestobeappliedtoavarietyofapplicationstraditionallyreservedforASICs.FPGAsarewellsuitedtodatapathdesigns,suchasthoseencounteredindigitalfilteringapplications.Thedensityofthenewprogrammabledevicesissuchthatanontrivialnumberofarithmeticoperationssuchasthoseencounteredindigitalfilteringmaybeimplementedonasingledevice.TheadvantagesoftheFPGAapproachtodigitalfilterimplementationincludehighersamplingratesthanareavailablefromtraditionalDSPchips,lowercost
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