脉冲噪声下改进型正弦信号幅度估计方法-豆柴文库

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脉冲噪声下改进型正弦信号幅度估计方法
Title:ImprovedAmplitudeEstimationMethodforSinusoidalSignalunderImpulseNoise
Abstract:
Inthispaper,animprovedamplitudeestimationmethodforsinusoidalsignalsundertheinfluenceofimpulsenoiseisproposed.Impulsenoiseisacommonprobleminvariouscommunicationsystemsandcansignificantlyaffecttheaccuracyofamplitudeestimation.Traditionalmethodsmayfailtoprovidesatisfactoryresultsinthepresenceofimpulsenoise.Therefore,thispaperpresentsanewapproachthatcombinessignalprocessingtechniqueswithstatisticalanalysistoimprovetheestimationaccuracy.Theproposedmethodhasbeenevaluatedthroughexperiments,andtheresultsdemonstrateitseffectivenessinmitigatingtheimpactofimpulsenoiseonamplitudeestimation.
1.Introduction
Sinusoidalsignalsarewidelyusedincommunicationsystems,andaccurateamplitudeestimationiscrucialforsignaldetection,demodulation,andothersignalprocessingtasks.However,inpracticalscenarios,thepresenceofimpulsenoisecandistorttheshapeofthesinusoidalsignalandintroduceuncertaintiesintheamplitudeestimationprocess.Impulsenoisecanoriginatefromvarioussources,suchaselectricalinterference,channeldistortions,orexternaldisturbances.Thus,itisessentialtodeveloprobustmethodsthatcanaccuratelyestimatetheamplitudeofsinusoidalsignalseveninthepresenceofimpulsenoise.
2.RelatedWork
Severalmethodshavebeenproposedtoestimatetheamplitudeofsinusoidalsignalsundernoiseconditions.Theseincludeclassicalmethodssuchasleast-squaresestimation,maximumlikelihoodestimation,andfrequency-domainmethodslikeDFT-basedestimation.WhilethesemethodsperformwellinGaussiannoiseenvironments,theirperformancedegradessignificantlywhenimpulsenoiseispresent.Therefore,additionaltechniquesneedtobeincorporatedintothesemethodstoimprovetheirrobustnessagainstimpulsenoise.
3.ProposedMethod
Theproposedmethodconsistsoftwomainsteps:pre-processingandamplitudeestimation.
3.1Pre-processing
Inthepre-processingstep,thereceivedsignalisfilteredtoreducetheimpactofimpulsenoise.Amedianfilterisusedtoremovetheoutlierscausedbyimpulsenoise,whilepreservingthech