digital-filter-design数字滤波器设计大学毕业论文英文文献翻译及原文

毕业设计（论文）外文文献翻译文献、资料中文题目：数字滤波器设计文献、资料英文题目：digitalfilterdesign文献、资料来源：文献、资料发表（出版）日期：院（部）：专业：班级：姓名：学号：指导教师：翻译日期：2017.02.14毕业设计（论文）外文文献翻译院系：电子与电气工程系年级专业：姓名：学号：附件：digitalfilterdesign指导老师评语：所翻译的外文参考文献与毕业论文选题一致，翻译较为准确，撰写格式规范，装订正确。指导教师签名：年月日外文文献：digitalfilterdesignAbstract：Withtheinformationageandtheadventofthedigitalworld,digitalsignalprocessinghasbecomeoneoftoday'smostimportantdisciplinesanddoortechnology.Digitalsignalprocessingincommunications,voice,images,automaticcontrol,radar,military,aerospace,medicalandhouseholdappliances,andmanyotherfieldswidelyapplied.Inthedigitalsignalprocessingapplications,thedigitalfilterisimportantandhasbeenwidelyapplied.Keyword：SCM;Proteus,Clanguage;Digitalfilter1、figuresUniton:AnaloganddigitalfiltersInsignalprocessing,thefunctionofafilteristoremoveunwantedpartsofthesignal,suchasrandomnoise,ortoextractusefulpartsofthesignal,suchasthecomponentslyingwithinacertainfrequencyrange.Thefollowingblockdiagramillustratesthebasicidea.Therearetwomainkindsoffilter,analoganddigital.Theyarequitedifferentintheirphysicalmakeupandinhowtheywork.Ananalogfilterusesanalogelectroniccircuitsmadeupfromcomponentssuchasresistors,capacitorsandopampstoproducetherequiredfilteringeffect.Suchfiltercircuitsarewidelyusedinsuchapplicationsasnoisereduction,videosignalenhancement,graphicequalisersinhi-fisystems,andmanyotherareas.Therearewell-establishedstandardtechniquesfordesigningananalogfiltercircuitforagivenrequirement.Atallstages,thesignalbeingfilteredisanelectricalvoltageorcurrentwhichisthedirectanalogueofthephysicalquantity(e.g.asoundorvideosignalortransduceroutput)involved.Adigitalfilterusesadigitalprocessortoperformnumericalcalculationsonsampledvaluesofthesignal.Theprocessormaybeageneral-purposecomputersuchasaPC,oraspecialisedDSP(DigitalSignalProcessor)chip.TheanaloginputsignalmustfirstbesampledanddigitisedusinganADC(analogtodigitalconverter).Theresultingbinarynumbers,representingsuccessivesampledvaluesoftheinputsignal,aretransferredtotheprocessor,whichcarriesoutnumericalcalculationsonthem.Thesecalculationstypicallyinvolvemultiplyingtheinputvaluesbyconstantsandaddingtheproductstogether.Ifnecessary,theresultsofthesecalculations,whichnowrepresentsampledvaluesofthefilteredsignal,areoutputthroughaDAC(digitaltoanalogconverter)toconvertthesignalbacktoanalogform.Notethatinadigitalfilter,thesignalisrepresentedbyasequenceofnumbers,ratherthanavoltageorcurrent.Thefollowingdiagramshowsthebasicsetupofsuchasystem.Unitreferstotheinputsignalsusedtofilterhardwareorsoftware.Ifthefilterinput,outputsignalsareseparated,theyareboundtorespondtotheimpactoftheUnitisseparated,suchasdigitalfiltersfilterdefinition.Digitalfilterfunction,whichwastoimportsequencesXtransformationintoexportoperationsthroughaseriesY.Accordingtofiguresfilterfunction24-hourliveresponsecharacteristics,digitalfilterscanbedividedintotwo,namely,unlimitedlonglivelonglivethecorrespondingIIRfilterandthelimitedresponsetoFIRfilters.IIRfiltershavetheadvantageofthedigitalfilterdesigncanusesimulationresults,andsimulationfilterdesignofalargenumberoftablesmayfacilitatesimple.Itistheshortcomingsofthenonlinearphase;Linearphaseifrequired,willusetheentirenetworkphase-correction.Imageprocessingandtransmissionofdatacollectionisrequiredwithlinearphasefiltersidentity.AndFIRlinearphasedigitalfiltertoachieve,butanarbitrarymargincharacteristics.Impactfromthedigitalfilterresponseoftheunitscanbedividedintotwobroadcategories:theimpactofthelimitedresponse(FIR)filters,andunlimitednumberofshocksto(IIR)digitalfilters.FIRfilterscanbestrictlylinearphase,butbecausethesystemFIRfilterfunctionextremityfixedattheoriginalpoint,itcanonlyusethehighernumberofbandstoachievetheirhighselectivityforthesamefilterdesignindicatorsFIRfiltercalledbandthanafewhigh-IIR5-10times,thecostishigher,Signaldelayisalsolarger.Butifthesamelinearphase,IIRfiltersmustbenetwork-widecalibrationphase,thesamesectionalsoincreasethenumberoffiltersandnetworkcomplexity.FIRfilterscanbeusedtoachievenon-Diguiway,notinalimitedprecisionofashock,andintothehomesandquantitativefactorsofuncertaintyarisingfromtheimpactoferrorsthanIIRfiltersmallnumber,andFIRfiltercanbeusedFFTalgorithms,thecomputationalspeed.ButunlikeIIRfiltercanfilterthroughthesimulationresults,thereisnoready-madeformulaFIRfiltermustusecomputer-aideddesignsoftware(suchasMATLAB)tocalculate.So,abroaderapplicationofFIRfilters,andIIRfiltersarenotverystrictrequirementsonoccasions.Unitfromsub-functionscanbedividedintothefollowingfourcategories:(1)Low-filter(LPF);(2)high-filter(HPF);(3)belt-filter(BPF);(4)topreventfilter(BSF).Thefollowingchartdottedlinefortheidealsofthefilterfrequencycharacteristics:2、MATLABintroducedMATLABisamatrixlaboratory(MatrixLaboratory)isintended.Inadditiontoanexcellentvaluecalculationcapability,italsoprovidesprofessionalsymbolsterms,wordprocessing,visualizationmodeling,simulationandreal-timecontrolfunctions.MATLABastheworld'stopmathematicalsoftwareapplications,withastrongengineeringcomputing,algorithmsresearch,engineeringdrawings,applicationsdevelopment,dataanaly