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《外文翻译--- - 基于tms320vc5402的自适应fir滤波器的设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、附录AImplementationofAdaptiveFIRFilterBasedonTMS320VC5402WangXiaojuanZhangZe(DepartmentofAutomation,CollegeofSciencesofTechnology,InnerMongoliaUniversity,Hohhot010021China,)AbstractThearticleintroducedthedesignandimplementationoftheadaptiveFIRfilterbasedonDSP(Digi
2、talSignalProcessor).Firstly,simulateexperimentoftheadaptiveFIRfilterstructureandalgorithmiscarriedoutbyMATLAB,andadaptivefilteringoftheinputsignaladdedGaussnoiseisperformed.Simulationwavesaregiven,andthereferencedatafortheDSPdesigningisprovided.Onthisfoundation,
3、TMS320VC5402DSPchipisselectedasthecenterprocessortodesignandimplementtheadaptiveFIRfilter.Thehardwaresystemdesignmodule,thesoftwaresystemdesignflowchartandtherelatedassemblycodearegiven.Theuniformityofsimulationresultsandmeasurementresultsandthefiltereffectissat
4、isfied.Keywords:AdaptiveFIRfilter,TMS320VC5402,LMSalgorithm.1IntroductionAdaptivefilteristheoneofthemodernfilter.Itisanimportantapplicationofadaptivesignalprocessingthatwasdevelopedinthe1940s.Adaptivefilterhasbeenusedwidelyinsystemidentification,noisecanceller,a
5、daptivelineenhance,adaptiveequalizationofcommunicationchannel,linearpredication,adaptivearrayantennaandsoon.Adaptivefilterisoppositetofixedcoefficientsfilter.Duringdigitalsignalprocessing,anumberofunpredictablesignals,noisesortime-varyingsignalsoftenneedtoproces
6、s,itisimpossibletoachieveoptimalfilteringforfixedcoefficientfilter,soadaptivefiltermustbedesignedtotrackthechangeofsignalandnoise.TheuniquestructureandinstructionofTMS320VC5402DSPprovidetheconvenientconditionfordesigningadaptivefilter.2PrincipleofAdaptiveFilterA
7、daptivefilterconsistsoftwobasicparts:thefilterwhichappliestherequiredprocessingontheincomingsignalwhichistobefiltered,andanadaptivealgorithm,whichadjuststhecoefficientsofthatfiltertosomehowimproveitsperformance.Whenadaptivefilterisdesigned,theautocorrelationfunc
8、tionofsignalsandnoisescannotbeknowninadvance.Duringthefiltering,withtheautocorrelationfunctionofsignalsandnoiseschangingslowlyovertime,filtercanautomaticallyadaptanda