Coherent Sampling vs. Window Sampling

Abstract:Oneofthemostusefultechniquesforevaluatingthedynamicperformanceoffastandultra-fastdataconvertersiscoherentsampling.ThistechniqueincreasesthespectralresolutionofaFastFourierTransform(FFT)andeliminatestheneedforwindowsamplingwhencertainconditionsaremet.However,iftheconditionsforcoherentsamplingcannotbemet,windowsamplingcanbeused.Thefollowingapplicationnotecomparescoherentsamplingwithwindowsamplingandprovidesanexplanationofhowtoevaluatehigh-speedanalog-to-digitalconverters(ADCs)usingeithermethod,whiledetailingtheadvantagesanddisadvantagesofeach.Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsBasestations/WirelessInfrastructureHigh-SpeedSignalProcessingKeywords:coherentsampling,windowsampling,high-speed,dataconverters,analog-to-digital,analogue-to-Mar29,2002digital,AtoD,A/D,converters,ADCsAPPLICATIONNOTE1040CoherentSamplingvs.WindowSamplingAbstract:Oneofthemostusefultechniquesforevaluatingthedynamicperformanceoffastandultra-fastdataconvertersiscoherentsampling.ThistechniqueincreasesthespectralresolutionofaFastFourierTransform(FFT)andeliminatestheneedforwindowsamplingwhencertainconditionsaremet.However,iftheconditionsforcoherentsamplingcannotbemet,windowsamplingcanbeused.Thefollowingapplicationnotecomparescohere