電子信息工程專業(yè)英語教程（第5版） 課件 Lesson 16 Digital Signal Processing

Unit6DigitalSignalProcessingLesson16DigitalSignalProcessing《電子信息工程專業(yè)英語教程（第5版）》Lesson16BasicConceptsofDSPBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques2024/5/292《電子信息工程專業(yè)英語教程（第5版）》Terminologysampleandholdcircuit

采樣保持電路zeroorderhold

零階保持acquisitiontime

采集時間quantizationlevel(step)

量化電平（間隔）Backgrounds2024/5/293《電子信息工程專業(yè)英語教程（第5版）》Terminology

fullscalerang

滿量程范圍dynamicrange

動態(tài)范圍signal-to-noiseratio

信噪比Backgrounds2024/5/294《電子信息工程專業(yè)英語教程（第5版）》TerminologyNyquisttheorem

奈奎斯特定理undersampling

欠采樣aliasing

混疊現(xiàn)象spectralinversion

頻譜反轉(zhuǎn)Backgrounds2024/5/295《電子信息工程專業(yè)英語教程（第5版）》Terminologyanti-aliasingfilter

抗混疊濾波器realtime

實時Backgrounds2024/5/296《電子信息工程專業(yè)英語教程（第5版）》TexttourOutlineIntroductionTheEssentialsofAnalog-to-digitalandDigital-to-analogConversionTechnologiesfordigitalsignalprocessingTheFPGAAlternativeTheASICAlternativeTheGPPAlternative2024/5/297《電子信息工程專業(yè)英語教程（第5版）》IntroductionWedon'tspeakinadigitalsignal.Adigitalsignalisalanguageof1sand0sthatcanbeprocessedbymathematics.Wespeakinreal-world,analogsignals.Analogsignalsarerealworldsignalsthatweexperienceeveryday-sound,light,temperature,andpressure.Adigitalsignalisanumericalrepresentationoftheanalogsignal.Itmaybeeasierandmorecosteffectivetoprocessthesesignalsinthedigitalworld.Intherealworld,wecanconvertthesesignalsintodigitalsignalsthroughtheanalog-to-digitalconverter,processthesignals,andifneeded,bringthesignalsbackouttotheanalogworldthroughthedigital-to-analogconverter.

2024/5/298《電子信息工程專業(yè)英語教程（第5版）》TheEssentialsofA/DandD/AConversion(1)A/DConversion

Figure6.1Theanalog-to-digitalconversionTosummarize,A/Dcomprisesanti-aliasing,sampling,quantizationanddigitisation.2024/5/299《電子信息工程專業(yè)英語教程（第5版）》TheEssentialsofA/DandD/AConversion(2)

D/AConversion

Figure6.2Thedigital-to-analogconversion2024/5/2910《電子信息工程專業(yè)英語教程（第5版）》advantagesofdesigningwithDSPsoverothermicroprocessors:Single-cyclemultiply-accumulateoperationsReal-timeperformance,simulationandemulationFlexibilityReliabilityIncreasedsystemperformanceReducedsystemcostTechnologiesforDSP

DSPs

2024/5/2911《電子信息工程專業(yè)英語教程（第5版）》HavethecapabilityofbeingreconfigurablewithinasystemOffergreaterrawperformanceperspecificoperation

TechnologiesforDSP

FPGAs2024/5/2912《電子信息工程專業(yè)英語教程（第5版）》canbetailoredtoperformspecificfunctionsextremelywellcanbemadequitepowerefficient.cannotbeiterativelychangedorupdatedwhileinproductdevelopment.typicallyemployedasbusinterfaces,gluelogic.,and/orfunctionalacceleratorsforaprogrammableDSP-basedsystem.TechnologiesforDSP

ASICs2024/5/2913《電子信息工程專業(yè)英語教程（第5版）》bestsuitedforperformingabroadarrayoftasks.forapplicationsinwhichtheendproductmustprocessanswersinrealtime,ormustdosowhilepoweredbyconsumerbatteries,GPPscomparativelypoorrealtimeperformanceandhighpowerconsumptionallbutrulesthemoutTechnologiesforDSP

GPPs2024/5/2914《電子信息工程專業(yè)英語教程（第5版）》VocabularyReciprocalprecederangeproportiondeducealternativeIterativeimpedimentStructureReading/writingtechniquesLanguageinuse2024/5/2915《電子信息工程專業(yè)英語教程（第5版）》Vocabulary2024/5/2916《電子信息工程專業(yè)英語教程（第5版）》ReciprocalindictionaryConcerningeachoftwoormorepersonsorthings.

交互的，相互的Interchanged,given,orowedtoeachother:

互換的，交換的reciprocalagreementstoabolishcustomsdutiesareciprocalinvitationtolunch.Performed,experienced,orfeltbybothsides:

相互的reciprocalrespect.2024/5/2917《電子信息工程專業(yè)英語教程（第5版）》ReciprocalindictionaryInterchangeable;complementary:

互補的reciprocalelectricoutlets.Oforrelatingtothereciprocalofaquantity.

相反的，倒數(shù)的Anumberrelatedtoanotherinsuchawaythatwhenmultipliedtogethertheirproductis1.

倒數(shù)2024/5/2918《電子信息工程專業(yè)英語教程（第5版）》ReciprocalintextThelengthofthesamplingintervalisthesameasthesamplingperiod,andthe

reciprocalofthesamplingperiodisthesamplingfrequency

fs.

“采樣間隔”的長度和“采樣周期”的長度相同，而“采樣周期”的倒數(shù)就是“采樣頻率”fs。

2024/5/2919《電子信息工程專業(yè)英語教程（第5版）》PrecedeindictionaryTocome,exist,oroccurbeforeintime.先于…Tocomebeforeinorderorrank;surpassoroutrank.高于…Tobeinapositioninfrontof;goinadvanceof.處于…前面；走在…前面Topreface;introduce給…作序；介紹：Heprecededhislecturewithahumorousanecdote.Tocomeorgobeforeintime,order,rank,orposition.搶先，居先2024/5/2920《電子信息工程專業(yè)英語教程（第5版）》PrecedeintextTomakesurealiasingwillnotoccur,samplingisalwayspreceded

bylowpassfiltering.為了保證不會出現(xiàn)混疊，在采樣之前總是要進行低通濾波。

2024/5/2921《電子信息工程專業(yè)英語教程（第5版）》RangeindictionaryExtentofperception,knowledge,experience,orability.

范圍Theareaorsphereinwhichanactivitytakesplace.

界限Thefullextentcovered:

涵蓋范圍withintherangeofpossibilities.Anamountorextentofvariation:

變動范圍 2024/5/2922《電子信息工程專業(yè)英語教程（第5版）》RangeindictionaryThegamutoftonesthatavoiceoraninstrumentiscapableofproducing.

音域Themaximumextentordistancelimitingoperation,action,oreffectiveness,asofaprojectile,anaircraft,aradiosignal,orasound.

射程，音程Themaximumdistancethatcanbecoveredbyavehiclewithaspecifiedpayloadbeforeitsfuelsupplyisexhausted.

路程Thedistancebetweenaprojectileweaponanditstarget.

射程2024/5/2923《電子信息工程專業(yè)英語教程（第5版）》RangeindictionaryAtestingareaatwhichrocketsandmissilesarelaunchedandtracked.

火箭試驗場Anextensiveareaofopenlandonwhichlivestockwanderandgraze.

放牧區(qū)Thegeographicregioninwhichaplantorananimalnormallylivesorgrows.

地理分布區(qū)2024/5/2924《電子信息工程專業(yè)英語教程（第5版）》RangeindictionaryThedifferenceorintervalbetweenthesmallestandlargestvaluesinafrequencydistribution.

頻差A(yù)class,arank,oranorder:

等級或次序：Anextendedgrouporseries,especiallyaroworchainofmountains.

山脈2024/5/2925《電子信息工程專業(yè)英語教程（第5版）》Rangeintext

Thestrengthofthesignalcomparedtothatofthequantizationerrorsismeasuredbydynamicrange

andsignal-to-noiseratio.相對于量化誤差的信號強度使用“動態(tài)范圍”和“信噪比”來度量。2024/5/2926《電子信息工程專業(yè)英語教程（第5版）》Rangeinuse

adjustablerange可調(diào)范圍applicationrange應(yīng)用范圍distributionrange分布范圍;分布幅域low-frequencyrange低頻段,低頻范圍rangeofactivity生產(chǎn)規(guī)模;經(jīng)濟活動范圍rangeofallowableerror容許誤差范圍rangeofgoods商品品種rangeofintegration積分范圍rangeoflinearity線性區(qū)域,線性變化范圍rangeofsensitivity靈敏度范圍rangeofsetvalue設(shè)定值范圍2024/5/2927《電子信息工程專業(yè)英語教程（第5版）》Rangeinuse

rangescopereachcompass

range指“運用心、眼、機器、力量等所能概括的整個范圍”,如:therangeofhisknowledge他的知識面scope指“活動、影響等的范圍”,特指“了解、見解、適用性以外的范圍”,如:Itiswithinmyscope.那是在我的范圍之內(nèi)reach指“手、運動、智力、影響等能及的范圍”,如:It'sbeyondthereachofhumanaid.那是人力所不及的。compass著重“某物所能活動的范圍”,如:speakwithincompass在限定范圍內(nèi)講話。2024/5/2928《電子信息工程專業(yè)英語教程（第5版）》ProportionindictionaryApartconsideredinrelationtothewhole.部分Arelationshipbetweenthingsorpartsofthingswithrespecttocomparativemagnitude,quantity,ordegree:比例theproperproportionbetweenoilandvinegarinthedressing.Arelationshipbetweenquantitiessuchthatifonevariesthenanothervariesinamannerdependentonthefirst比率WedonotalwaysfindvisiblehappinessinproportiontovisiblevirtueAgreeableorharmoniousrelationofpartswithinawhole;balanceorsymmetry.均稱，平衡Dimensions;size.容積；大小Astatementofequalitybetweentworatios.比例2024/5/2929《電子信息工程專業(yè)英語教程（第5版）》ProportionindictionaryToadjustsothatproperrelationsbetweenpartsareattained.

使成比例Toformthepartsofwithbalanceorsymmetry.

使平衡2024/5/2930《電子信息工程專業(yè)英語教程（第5版）》ProportionintextThisprocessbeginsbyconvertingeachdigitalcodeintoananalogvoltagethatisproportionalinsizetothenumberrepresentedbythecode.首先，將碼字轉(zhuǎn)換為和碼字所代表數(shù)字的大小成正比的模擬電壓。

2024/5/2931《電子信息工程專業(yè)英語教程（第5版）》Proportioninuse

inproportion相稱；恰如其分;inproportionas[to]按...的比例;與...成比例;和...相稱indirectproportionto與...成正比例ininverseproportionto與...成反比例inproportionwith按比例intheproportionof按...的比例outofproportionto和...不成比例;和...不相稱2024/5/2932《電子信息工程專業(yè)英語教程（第5版）》DeduceindictionaryToreach(aconclusion)byreasoning.

推論Toinferfromageneralprinciple;reasondeductively.

演繹推理Totracetheoriginorderivationof.

溯源2024/5/2933《電子信息工程專業(yè)英語教程（第5版）》DeduceintextAlloftheimportantsignalcharacteristicscanbededucedfromthecopyofthespectrumthatappearsinthebasebandthroughsampling.信號的所有重要特征都可以從因采樣而出現(xiàn)在基帶的頻譜副本中得到。

2024/5/2934《電子信息工程專業(yè)英語教程（第5版）》Thechoicebetweentwomutuallyexclusivepossibilities.

兩者擇一Asituationpresentingsuchachoice.

可選擇的Eitherofthesepossibilities.

另一可選擇的Oneofanumberofthingsfromwhichonemustbechosen.

必須選出的一項的Alternativeindictionary2024/5/2935《電子信息工程專業(yè)英語教程（第5版）》Allowingornecessitatingachoicebetweentwoormorethings.

二選一的Existingoutsidetraditionalorestablishedinstitutionsorsystems:

他擇性的analternativelifestyle.一種超越古今的生活方式Espousingorreflectingvaluesthataredifferentfromthoseoftheestablishment:

標新立異的analternativenewspaperalternativegreetingcards.Alternativeindictionary2024/5/2936《電子信息工程專業(yè)英語教程（第5版）》However,therearesomeoftheotheralternativesavailablefordigitalsignalprocessing.HowtheycomparetoDSPs?然而，實現(xiàn)數(shù)字信號處理還可以有其他一些選擇。和數(shù)字信號處理器相比，這些選擇如何呢？

Alternativeintext2024/5/2937《電子信息工程專業(yè)英語教程（第5版）》havenoalternativebut除...外別無選擇;只有;只好Alternativeinuse2024/5/2938《電子信息工程專業(yè)英語教程（第5版）》havenoalternativebut除...外別無選擇;只有;只好Alternativeinuse2024/5/2939《電子信息工程專業(yè)英語教程（第5版）》choicealternativeoptionpreferenceselectionelectionEachofthesenounsdenotestheact,power,orrightofchoosing.

Choiceimpliesbroadlythefreedomtochoosefromaset,asofpersonsorthingsThestoreoffersawidechoiceoffruitsandvegetables.Ihadnochoice.Theirdecisionwasfinal.

Alternativeemphasizesachoosingbetweenonlytwopossibilitiesorcoursesofaction:Alternativeinuse2024/5/2940《電子信息工程專業(yè)英語教程（第5版）》Optionoftenstressesapowerorlibertytochoosethathasbeengranted,asbyanauthorityTheoptionliesbetweenacceptingthecandidatetheadministrationproposesandreconstitutingthesearchcommittee.

Preferenceindicateschoicebasedonone'svalues,bias,orpredilections:Wewereofferedourpreferenceofwines.

Alternativeinuse2024/5/2941《電子信息工程專業(yè)英語教程（第5版）》Selectionsuggestsavarietyofthingsorpersonstochoosefrom:Parentsshouldexercisecareintheirselectionofthemoviestheiryoungchildrensee.Electionespeciallyemphasizestheuseofjudgmentinchoosing:Theuniversityrecommendstheelectionofcoursesincompositionandliterature.Alternativeinuse2024/5/2942《電子信息工程專業(yè)英語教程（第5版）》Characterizedbyorinvolvingrepetition,recurrence,reiteration,orrepetitiousness.

重復(fù)的Iteration：Incomputerprogramming,aprocesswhichrepeatsthesameseriesofprocessingstepsuntilapredeterminedstateorbranchconditionisreached

循環(huán)；迭代

Iterativeindictionary2024/5/2943《電子信息工程專業(yè)英語教程（第5版）》However,sinceASICSarenotfield-programmable,theirfunctionalitycannotbeiterativelychangedorupdatedwhileinproductdevelopment.然而，ASIC無法進行現(xiàn)場編程；即使是在產(chǎn)品開發(fā)階段，也無法對其功能進行反復(fù)修改和升級。

Iterativeintext2024/5/2944《電子信息工程專業(yè)英語教程（第5版）》Somethingthatimpedes;ahindranceoranobstruction.

障礙aspeechimpediment.Impedimentindiction