lesson 16 basic concepts of dsp

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1、Unit6DigitalSignalProcessingLesson16BasicConceptsofDSP《电子信息工程专业英语教程》任治刚主编电子工业出版社www.phei.com.cn2021/7/5《电子信息工程专业英语教程》2Lesson16BasicConceptsofDSPBackgroundsTexttourLanguageinuseVocabularyStructureReading/writingtechniques2021/7/5《电子信息工程专业英语教程》3Terminologysampleandholdcircuit采样保持电路zeroorderhold零

2、阶保持acquisitiontime采集时间quantizationlevel(step)量化电平（间隔）Backgrounds2021/7/5《电子信息工程专业英语教程》4Terminologyfullscalerang满量程范围dynamicrange动态范围signal-to-noiseratio信噪比Backgrounds2021/7/5《电子信息工程专业英语教程》5TerminologyNyquisttheorem奈奎斯特定理undersampling欠采样aliasing混叠现象spectralinversion频谱反转Backgrounds2021/7/5《电子信息工

3、程专业英语教程》6Terminologyanti-aliasingfilter抗混叠滤波器realtime实时Backgrounds2021/7/5《电子信息工程专业英语教程》7TexttourOutlineIntroductionTheEssentialsofAnalog-to-digitalandDigital-to-analogConversionTechnologiesfordigitalsignalprocessingTheFPGAAlternativeTheASICAlternativeTheGPPAlternative2021/7/5《电子信息工程专业英语教程》8In

4、troductionWedon'tspeakinadigitalsignal.Adigitalsignalisalanguageof1sand0sthatcanbeprocessedbymathematics.Wespeakinreal-world,analogsignals.Analogsignalsarerealworldsignalsthatweexperienceeveryday-sound,light,temperature,andpressure.Adigitalsignalisanumericalrepresentationoftheanalogsignal.Itma

5、ybeeasierandmorecosteffectivetoprocessthesesignalsinthedigitalworld.Intherealworld,wecanconvertthesesignalsintodigitalsignalsthroughtheanalog-to-digitalconverter,processthesignals,andifneeded,bringthesignalsbackouttotheanalogworldthroughthedigital-to-analogconverter.2021/7/5《电子信息工程专业英语教程》9TheE

6、ssentialsofA/DandD/AConversion(1)A/DConversionFigure6.1Theanalog-to-digitalconversionTosummarize,A/Dcomprisesanti-aliasing,sampling,quantizationanddigitisation.2021/7/5《电子信息工程专业英语教程》10TheEssentialsofA/DandD/AConversion(2)D/AConversionFigure6.2Thedigital-to-analogconversion2021/7/5《电子信息工程专业英语教程

7、》11advantagesofdesigningwithDSPsoverothermicroprocessors:Single-cyclemultiply-accumulateoperationsReal-timeperformance,simulationandemulationFlexibilityReliabilityIncreasedsystemperformanceReducedsystemcostTechnologiesforDSPDSPs2021/7/5