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1、附录AImplementationofAdaptiveFIRFilterBasedonTMS320VC5402WangXiaojuanZhangZe(DepartmentofAutomation,CollegeofSciencesofTechnology,InnerMongoliaUniversity,Hohhot010021China,)AbstractThearticleintroducedthedesignandimplementationoftheadaptiveFIRfilterbasedonDSP(D
2、igitalSignalProcessor).Firstly,simulateexperimentoftheadaptiveFIRfilterstructureandalgorithmiscarriedoutbyMATLAB,andadaptivefilteringoftheinputsignaladdedGaussnoiseisperformed.Simulationwavesaregiven,andthereferencedatafortheDSPdesigningisprovided.Onthisfound
3、ation,TMS320VC5402DSPchipisselectedasthecenterprocessortodesignandimplementtheadaptiveFIRfilter.Thehardwaresystemdesignmodule,thesoftwaresystemdesignflowchartandtherelatedassemblycodearegiven.Theuniformityofsimulationresultsandmeasurementresultsandthefilteref
4、fectissatisfied.Keywords:AdaptiveFIRfilter,TMS320VC5402,LMSalgorithm.1IntroductionAdaptivefilteristheoneofthemodernfilter.Itisanimportantapplicationofadaptivesignalprocessingthatwasdevelopedinthe1940s.Adaptivefilterhasbeenusedwidelyinsystemidentification,nois
5、ecanceller,adaptivelineenhance,adaptiveequalizationofcommunicationchannel,linearpredication,adaptivearrayantennaandsoon.Adaptivefilterisoppositetofixedcoefficientsfilter.Duringdigitalsignalprocessing,anumberofunpredictablesignals,noisesortime-varyingsignalsof
6、tenneedtoprocess,itisimpossibletoachieveoptimalfilteringforfixedcoefficientfilter,soadaptivefiltermustbedesignedtotrackthechangeofsignalandnoise.TheuniquestructureandinstructionofTMS320VC5402DSPprovidetheconvenientconditionfordesigningadaptivefilter.2Principl
7、eofAdaptiveFilterAdaptivefilterconsistsoftwobasicparts:thefilterwhichappliestherequiredprocessingontheincomingsignalwhichistobefiltered,andanadaptivealgorithm,whichadjuststhecoefficientsofthatfiltertosomehowimproveitsperformance.Whenadaptivefilterisdesigned,t
8、heautocorrelationfunctionofsignalsandnoisescannotbeknowninadvance.Duringthefiltering,withtheautocorrelationfunctionofsignalsandnoiseschangingslowlyovertime,filtercanautomaticallyadaptanda
