标签: spectral

SpectralAnalysisandFilterTheoryinAppliedGeophysics

TheDiscreteFourierTransform(DFT)isoneofthemostimportanttoolsinDigitalSignalProcessing.Thischapterdiscussesthreecommonwaysitisused.First,theDFTcancalculateasignal'sfrequencyspectrum.Thisisadirectexaminationofinformationencodedinthefrequency,phase,andamplitudeofthecomponentsinusoids.Forexample,humanspeechandhearingusesignalswiththistypeofencoding.Second,theDFTcanfindasystem'sfrequencyresponsefromthesystem'simpulseresponse,andviceversa.Thisallowssystemstobeanalyzedinthefrequencydomain,justasconvolutionallowssystemstobeanalyzedinthetimedomain.Third,theDFTcanbeusedasanintermediatestepinmoreelaboratesignalprocessingtechniques.TheclassicexampleofthisisFFTconvolution,analgorithmforconvolvingsignalsthatishundredsoftimesfasterthanconventionalmethods.SpectralAnalysisCHAPTERApplicationsoftheDFT9TheDiscreteFourierTransform(DFT)isoneofthemostimportanttoolsinDigitalSignalProcessing.Thischapterdiscussesthreecommonwaysitisused.First,theDFTcancalculateasignal'sfrequencyspectrum.Thisisadirectexaminationofinformationencodedinthefrequency,phase,andamplitudeofthecomponentsinusoids.Forexample,humanspeechandhearingusesignalswiththistypeofencoding.Second,theDFTcanfindasystem'sfrequencyresponsefromthesystem'simpulseresponse,andviceversa.Thisallowssystemstobeanalyzedinthefrequencydomain,justasconvolutionallowssystemstobeanalyzedinthetimedomain.Third,theDFTcanbeusedasanintermediatestepinmoreelaboratesignalp……

JustasanalogfiltersaredesignedusingtheLaplacetransform,recursivedigitalfiltersaredevelopedwithaparalleltechniquecalledthez-transform.Theoverallstrategyofthesetwotransformsisthesame:probetheimpulseresponsewithsinusoidsandexponentialstofindthesystem'spolesandzeros.TheLaplacetransformdealswithdifferentialequations,thes-domain,andthes-plane.Correspondingly,thez-transformdealswithdifferenceequations,thez-domain,andthez-plane.However,thetwotechniquesarenotamirrorimageofeachother;thes-planeisarrangedinarectangularcoordinatesystem,whilethez-planeusesapolarformat.Recursivedigitalfiltersareoftendesignedbystartingwithoneoftheclassicanalogfilters,suchastheButterworth,Chebyshev,orelliptic.Aseriesofmathematicalconversionsarethenusedtoobtainthedesireddigitalfilter.Thez-transformprovidestheframeworkforthismathematics.TheChebyshevfilterdesignprogrampresentedinChapter20usesthisapproach,andisdiscussedindetailinthischapter.CHAPTERThez-Transform33JustasanalogfiltersaredesignedusingtheLaplacetransform,recursivedigitalfiltersaredevelopedwithaparalleltechniquecalledthez-transform.Theoverallstrategyofthesetwotransformsisthesame:probetheimpulseresponsewithsinusoidsandexponentialstofindthesystem'spolesandzeros.TheLaplacetransformdealswithdifferentialequations,thes-domain,andthes-plane.Correspondingly,thez-transformdealswithdifferenceequations,thez-domain,andthez-plane.However,thetwotechniquesarenotamirrorimageofeachother;thes-planeisarrangedinarectangularcoordinatesystem,whilethez-planeusesapolarformat.Recursivedigitalfiltersareoftendesignedbystartingwithone……

Abstract:TheThermalNoiseCalculator(TNC)aidsintheanalysisofthermalnoisefoundinresistorsandothernoisesources.TheprogramisforusewithanHP®50gcalculatororfreePCemulator.Maxim>DesignSupport>AppNotes>A/DandD/AConversion/SamplingCircuits>APP5059Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP5059Maxim>DesignSupport>AppNotes>DigitalPotentiometers>APP5059Keywords:thermalnoise,noisevoltage,whitespectraldensity,Johnsonresistance,temperature,1/fcornerfrequency,calculators,analogcircuitdesign,HP50gprograms,designtool,circuitanalysis,signaltestmeasurement,bandwidth,clock,jitter,analogreferredAug23,2011APPLICATIONNOTE5059ThermalNoiseCalculatorTutorialBy:BillLaumeister,StrategicApplicationsEngineerAbstract:TheThermalNoiseCalculator(TNC……

Abstract:Analog-to-digitalconverters(ADCs)representthelinkbetweenanaloganddigitalworldsinreceivers,testequipmentandotherelectronicdevices.AsoutlinedinPart1ofthisarticleseries,anumberofkeydynamicparametersprovideanaccuratecorrelationofthedynamicperformancetobeexpectedfromagivenADC.Part2ofthisarticleseriescoverssomeofthesetupconfigurations,equipmentrecommendationsandmeasurementproceduresfortestingthedynamicspecificationsofhigh-speedADCs.Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP729Keywords:analogtodigitalconverters,ADCs,high-speedADC,SNR,SINAD,ENOB,THD,SFDR,two-toneIMD,multi-toneIMD,clockjitter,FFT,spectrum,windowfunctions,spectralleakage,frequencybin,bins,coherentsampling,hanning,hamming,flattopJul22,2002TUTORIAL729DynamicTestingofHigh-SpeedADCs,Part2Jul22,2002Abstract:Analog-to-digital……

Abstract:Thefirstpartofthisarticleseriesdiscussescommonlyknowndefinitionsmostcrucialforhigh-speeddataconverters(inthiscaseanalog-to-digitalconverterorshortADCs)usedincommunications,instrumentationanddataacquisitionapplications.Thepurposeofthisarticleistohelpthereadergainabetterunderstandingofcommonparameterssuchassignal-to-noiseratio(SNR),signal-to-noise-and-distortion(SINAD),totalharmonicdistortion(THD)andspurious-freedynamicrange(SFDR).Inthesecondpartofthisarticleseries(see"DynamicTestingofHigh-SpeedADCs"forfurtherreading),theseparameterdefinitionsareputtothetestbymeasuringtheminreal-worldtestscenarios.Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP728Keywords:ADCs,analogtodigital,analogdigital,converter,high-speedADC,high-speedanalogtodigitalconverters,SNR,SINAD,THD,SFDR,two-toneIMD,multi-toneIMD,VSWR,noise,harmonics,DFT,FFT,spectralleakageNov19,2001TUTORIAL728DefiningandTestingDynamicParametersinHigh-SpeedADCs,Part1Nov19,2001Abstract:Thefirstpartofthisa……

Abstract:TheglossaryprovidesadetaileddescriptionofACperformancetermsrelatedtohigh-speeddataconverterssuchasADCsandDACs.Italsogivessomeinsightintothetestconditionstheseparametersarespecifiedfor.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSHIGH-SPEEDSIGNALPROCESSINGKeywords:aliasing,aperture,INL,crosstalk,coherentsampling,common-mode,DNL,dithering,ENOB,flash,Mar22,2001frequencybin,glitchenergy,latency,monotonicity,intermodulation,SNR,NPR,quantization,SFDR,SINAD,spectralleakage,THD,VSWRAPPLICATIONNOTE740GlossaryofFrequentlyUsedHigh-SpeedDataConverterTermsAbstract:TheglossaryprovidesadetaileddescriptionofACperformancetermsrelatedtohigh-speeddataconverterssuchasADCsandDACs.Italsogivessomeinsightintothetestconditionstheseparametersarespecifiedfor.Aliasing/Anti-AliasingInsamplingtheory,aninputsignal(fIN)mustbesampledwithatleasttwiceitsfrequency(Nyquistcrit……

摘要：本系列文章的第一部分讨论了俗称的定义最适合高速数据转换器（模拟-数字转换器在这种情况下，或短的ADC）用于通讯，仪器仪表和数据采集应用的关键。这篇文章的目的是为了帮助读者获得更好地了解一个共同的参数，如信号噪声比（SNR），信号与噪声及失真比（SINAD），总谐波失真（THD）和杂散无动态范围（SFDR）。第二部分在本系列文章（见“进一步阅读”高速ADC动态测试），这些参数定义了考验，通过测量他们在现实世界中的测试场景。Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP728Keywords:ADCs,analogtodigital,analogdigital,converter,high-speedADC,high-speedanalogtodigitalconverters,SNR,SINAD,THD,SFDR,two-toneIMD,multi-toneIMD,VSWR,noise,harmonics,DFT,FFT,spectralleakageNov19,2001TUTORIAL728DefiningandTestingDynamicParametersinHigh-SpeedADCs,Part1Nov19,2001Abstract:Thefirstpartofthisa……

摘要：模拟-数字转换器（ADC）的代表在接收器，测试设备及其他电子设备的模拟和数字世界之间的联系。正如在本系列文章的第1部分所述，一些关键的动态参数，提供准确的相关性的动态性能，可以从一个给定的ADC预期。本系列文章的第二部分包括一些安装配置，设备的建议和高速ADC的动态规格测试测量程序。Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP729Keywords:analogtodigitalconverters,ADCs,high-speedADC,SNR,SINAD,ENOB,THD,SFDR,two-toneIMD,multi-toneIMD,clockjitter,FFT,spectrum,windowfunctions,spectralleakage,frequencybin,bins,coherentsampling,hanning,hamming,flattopJul22,2002TUTORIAL729DynamicTestingofHigh-SpeedADCs,Part2Jul22,2002Abstract:Analog-to-digital……

摘要：本系列文章的第一部分讨论了俗称的定义最适合高速数据转换器（模拟-数字转换器在这种情况下，或短的ADC）用于通讯，仪器仪表和数据采集应用的关键。这篇文章的目的是为了帮助读者获得更好地了解一个共同的参数，如信号噪声比（SNR），信号与噪声及失真比（SINAD），总谐波失真（THD）和杂散无动态范围（SFDR）。第二部分在本系列文章（见“进一步阅读”高速ADC动态测试），这些参数定义了考验，通过测量他们在现实世界中的测试场景。Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP728Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP728Keywords:ADCs,analogtodigital,analogdigital,converter,high-speedADC,high-speedanalogtodigitalconverters,SNR,SINAD,THD,SFDR,two-toneIMD,multi-toneIMD,VSWR,noise,harmonics,DFT,FFT,spectralleakageNov19,2001TUTORIAL728DefiningandTestingDynamicParametersinHigh-SpeedADCs,Part1Nov19,2001Abstract:Thefirstpartofthisa……

摘要：模拟-数字转换器（ADC）的代表在接收器，测试设备及其他电子设备的模拟和数字世界之间的联系。正如在本系列文章的第1部分所述，一些关键的动态参数，提供准确的相关性的动态性能，可以从一个给定的ADC预期。本系列文章的第二部分包括一些安装配置，设备的建议和高速ADC的动态规格测试测量程序。Maxim>DesignSupport>TechnicalDocuments>Tutorials>A/DandD/AConversion/SamplingCircuits>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>Basestations/WirelessInfrastructure>APP729Maxim>DesignSupport>TechnicalDocuments>Tutorials>High-SpeedSignalProcessing>APP729Keywords:analogtodigitalconverters,ADCs,high-speedADC,SNR,SINAD,ENOB,THD,SFDR,two-toneIMD,multi-toneIMD,clockjitter,FFT,spectrum,windowfunctions,spectralleakage,frequencybin,bins,coherentsampling,hanning,hamming,flattopJul22,2002TUTORIAL729DynamicTestingofHigh-SpeedADCs,Part2Jul22,2002Abstract:Analog-to-digital……

摘要：热噪声计算器（TNC）艾滋病在电阻和其他噪声源中的热噪声分析。该方案是®50克使用惠普计算器或免费的PC模拟器Maxim>DesignSupport>AppNotes>A/DandD/AConversion/SamplingCircuits>APP5059Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP5059Maxim>DesignSupport>AppNotes>DigitalPotentiometers>APP5059Keywords:thermalnoise,noisevoltage,whitespectraldensity,Johnsonresistance,temperature,1/fcornerfrequency,calculators,analogcircuitdesign,HP50gprograms,designtool,circuitanalysis,signaltestmeasurement,bandwidth,clock,jitter,analogreferredAug23,2011APPLICATIONNOTE5059ThermalNoiseCalculatorTutorialBy:BillLaumeister,StrategicApplicationsEngineerAbstract:TheThermalNoiseCalculator(TNC……

发一本频谱分析的书吧,共103页,SpectralAnalysisofSignals……