基于LabVIEW和MATLAB混合编程的自适应滤波器设计

200911ELECTRONICTESTJan.2009No.140LabVIEWMATLAB,,(133002):LabVIEW,,LabVIEW,,LabVIEWMAT2ALB,,,LMS,,,,:LabVIEW;MATLAB;;LMS:TN911.7:ADesignofLMSadaptivefilterbasedonLabVIEWandMATLABZhagTingrui,LiShanji,DingJinglong(CollegeofEngineering,YanbianUniversity,Yanji133002,China)Abstract:LabVIEWisafiguralvirtualinstrumentprogramlanguage,whichhaspowerfuldigit2alsignalprocessingfunction.Adaptivefilterscanbedesignedtoavirtualinstrumentandap2pliedtoactualprojecttotesttheperformancebasedonLabVIEW.ThepaperintroducesthemethodofdesigningadaptivefilterbasedonmixedprogrambetweenLabVIEWandMATLABwhichhassimpledesignstructureandgoodman2machineinteractioninterface.Inordertoverifytheeffectiveness,simulationsarebeengivenusingLMSalgorithm.Thesimulationresultsshowthattheadaptivefilterhasgoodperformance,theoperableperformanceisalsopowerful,andcanbeappliedtomanydifferentsituationofsignalprogressing.Keywords:LabVIEW;MATLAB;adaptivefilter;LMSalgorithm0LabVIEW,,,,,[123],,,2009.141,LabVIEWVI,VI,;LabVIEW(MATLABC)[4,8]LabVIEWMATLAB,MATLABLabVIEW,LMS1,,,,,,11,x1,,xNN,:X=[x1,,xN]T,w1,,wNN,,dy,e1:E[e2]=E[(d-y)2]=E[(d-WTX)2](1)(1),,W,[5]:,,,LMSRLS[6]LMS,RLS()LMS,,,LMS,,(LMS):e(n)=d(n)-WTX(n)W(n)=W(n)+2e(n)X(n)(2):W(n)n,X(n)=[x(n),x(n-1),x(n-N+1)]n,Nd(n),e(n),LMS:01/max,max[7]2LabVIEWLabVIEW,,LMS,,LabVIEW:[8]2.1:x(n)=Asin(2f0n)+v(n),:A,1,f0=10Hz,v(n)LMS,LMSW(0)=0,LabVIEW8.52009.1VirtualInstrumentTechnology4222labVIEWLMS2LabVIEW,,,,,,,,,2.2LabVIEW,LabVIEW,3LabVIEWMATLABScriptMATLAB[9211],MATLAB,,MATLABLMSVI,32.34u=0.0008,(SNR)20dB,5dB,-5dB;510dB,0.0002,0.0008,0.002,,,:(1),(a):(SNR=20dB),LMS,;(SNR=-5dB),LMS,(2),u=0.02,,,,;(b),u=0.0002,u=0.0008u=0.002,,,:,;u=0.00002,,2009.1433LabVIEW,,LMS,LabVIEWMAT2LAB,,LabVIEW[1],,.LabVIEW[J].,2008,21(5):14215.[2],,,.LabVIEWIIR[J].,2008,24(16):95297.[3].LabVIEW[J].,2008,27(4):68269,80.[4],,.LabVIEW[J].,2006,22(5):1632164.[5].[M].:,1995.[6]PauloS.R.Diniz.[M].,,.:,2004.[7],.LMS[J].,2001(8):109421096.[8].LabVIEW7.1[M].:,2005.[9],.LabVIEW[J].,2004,19(3):37238.[10].LabVIEWMATLAB[J].,2007,36(7):1292131.[11],,.LabVIEW[J].,2008,31(7):1662170.(19822),,2006,(19592),,,,:,133002