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1、附录AImplementationofAdaptiveFIRFilterBasedonTMS320VC5402WangXiaojuanZhangZe(DepartmentofAutomation,CollegeofSciencesofTechnology,InnerMongoliaUniversity,Hohhot010021China,)AbstractThearticleintroducedthedesignandimplementationoftheadaptiveFIRfilterbasedonDSP(DigitalSignalProcessor).
2、Firstly,simulateexperimentoftheadaptiveFIRfilterstructureandalgorithmiscarriedoutbyMATLAB,andadaptivefilteringoftheinputsignaladdedGaussnoiseisperformed.Simulationwavesaregiven,andthereferencedatafortheDSPdesigningisprovided.Onthisfoundation,TMS320VC5402DSPchipisselectedasthecenter
3、processortodesignandimplementtheadaptiveFIRfilter.Thehardwaresystemdesignmodule,thesoftwaresystemdesignflowchartandtherelatedassemblycodearegiven.Theuniformityofsimulationresultsandmeasurementresultsandthefiltereffectissatisfied.Keywords:AdaptiveFIRfilter,TMS320VC5402,LMSalgorithm.
4、1IntroductionAdaptivefilteristheoneofthemodernfilter.Itisanimportantapplicationofadaptivesignalprocessingthatwasdevelopedinthe1940s.Adaptivefilterhasbeenusedwidelyinsystemidentification,noisecanceller,adaptivelineenhance,adaptiveequalizationofcommunicationchannel,linearpredication,
5、adaptivearrayantennaandsoon.Adaptivefilterisoppositetofixedcoefficientsfilter.Duringdigitalsignalprocessing,anumberofunpredictablesignals,noisesortime-varyingsignalsoftenneedtoprocess,itisimpossibletoachieveoptimalfilteringforfixedcoefficientfilter,soadaptivefiltermustbedesignedtot
6、rackthechangeofsignalandnoise.TheuniquestructureandinstructionofTMS320VC5402DSPprovidetheconvenientconditionfordesigningadaptivefilter.2PrincipleofAdaptiveFilterAdaptivefilterconsistsoftwobasicparts:thefilterwhichappliestherequiredprocessingontheincomingsignalwhichistobefiltered,an
7、danadaptivealgorithm,whichadjuststhecoefficientsofthatfiltertosomehowimproveitsperformance.Whenadaptivefilterisdesigned,theautocorrelationfunctionofsignalsandnoisescannotbeknowninadvance.Duringthefiltering,withtheautocorrelationfunctionofsignalsandnoiseschangingslowlyovertime,filte
8、rcanautomaticallyadaptanda
