简介：Time-to-DigitalConverter(TDC)isakeyblockusedasthephase/frequencydetectorinanAll-DigitalPhase-LockedLoop(ADPLL).Usually,itoccupiesalargeproportionofADPLL'stotalpowerconsumptionuptoabout30%to40%.Inthispaper,thedetailedpowerconsumptionofdifferentcomponentsintheTDCisanalyzed.APowerManagementBlock(PMB)ispresentedfortheTDCtoreduceitspowerconsumption.A24-bitsTDCcorewiththeproposedPMBisimplementedinHJTC0.18μmCMOStechnology.Simulationresultsshowthatupto84%powerreductionisachievedusingourproposedtechnique.

简介：Adigitalwatermarkingtechniqueisamulti-scientificdisciplinewhichisdevelopedrapidlyinlastseveralyearsfordigitalcontentprotection,suchascopyrightprotection,authenticationprotection,sourcetracing,etc.However,inrealisticscenarios,thedigitalwatermarkingsystemfacessignificantsecureissues,forexample,theattackerswanttoremove,detect,orembedillegalwatermarksignals.Therefore,theaimofthiscontributionistoillustraterecentresultsofrobustandsecurewatermarkingtothesignalprocessingcommunity,andhighlightbothbenefitsandstillopenissues.Specifically,thispaperisintendedtointroducetheconceptofsecureandrobustdigitalwatermarkingsystem,andprovidewithproblemsandtheircountermeasures.Firstofall,theclassicwatermarkmodelandcryptosystemwillbereviewedandthen,theconceptofsecureandrobustdigitalwatermarkingsystemwillbedescribed.Next,thewatermarkattackwillbeclassifiedanddescribed.Finally,somecountermeasuresthatcanhelptoimprovesecureandrobustnessareconsidered.IndexTermsCountermeasures,digitalwatermarkingsystem,robust,security,watermarkattacks.

简介：Inca数码印刷公司推出了IncaOnset平台型UV喷墨数字印刷机，此举在大幅面UV喷墨数字印刷领域具有突破性意义。该设备具有惊人的输出能力．100张全开幅面每小时．打印尺寸可达3.2×1．5米．速度可达每小时500平方米。

简介：Arobustdigitalreceiverbasedonamatchedfilter(MF)isproposedfortheradiofrequencyidentification(RFID)readersystemtoenhancethereliabilityofsignalprocessingintheelectronicproductcode(EPC)sensornetwork(ESN).Theperformanceoftheproposedreceiverisinvestigatedbyexaminingtheanti-collisionalgorithmintheEPCglobalClasslGeneration2protocol.Thevalidityandusefulnessaredemonstratedbybothcomputersimulationsandexperiments.Basedontheverificationresults,comparingwiththeconventionalzerocrossingdetector(ZCD)basedreceiver,theproposedreceiverisveryrobustagainststrongamplitudedistortionsandconsiderablefrequencydeviationshappeningonthebackscatteredsignalfromapassivetag.

简介：Anewdigitalmodulationrecognitionalgorithmbasedontheinstantaneousinformationisproposedtoimprovetherecognitionsuccessrateinthelowsignalnoiseratio(SNR).Firstdenoisingoftheinstantaneousinformationisoptimizedbywaveletfilter,whichcanimprovetherecognitionabilityatlowSNR.Besidestheexisting3keyfeatureparameters,3newkeyfeatureparametersareproposedtobeusedasthedecisioncriteriaforidentifyingdifferenttypesofdigitalmodulation,whichsimplifiestherecognitionprocessandimprovestherecognitionabilityatlowSNR.Thesimulationsdemonstratethatallmodulationtypesofinteresthavebeenclassifiedwithsuccessrateofnolowerthan99%whenSNRis10dB.EveniftheSNRislowerthan5dB,thesuccessrateisover95.4%formostofthemodulationtypes.

简介：Inthispaper,anewdirectopticaltriangulation(DOT)formeasuringtheout-ofplanedisplacementisgiven.Inordertostateitsprinciple,DOTisusedtomea-sureamicro-displacementofarigidboty,andatthesametime,themethodofdigitalimageprocessingisalsogiven.

简介：框架率相应于时间的分辨率，图画的象素的数字相应于空间分辨率。他们为研究人员两个都是很重要的。理想的图象分析和处理系统应该有高空间与时间的特征，它在实际使用是昂贵的。用多数字的照相机(DC)提高动态框架率的一个新方法被建议，结果证明它能有效地增加框架率并且减少在实际使用的费用。

简介：Atechnologyforcombiningdigitalwatermarkswithtwo-colorbitmapimageonthethresholdwatermarkingmethodispresented.Ourtechnologydoesn'taddanythingtothedigitalmedia,butcombinesthewatermarksintwo-colorbitmapimagebylookingforsomecharacteristicvaluesinthebitmapandusestherelationshipbetweenthewatermarksandthecharacteristicvaluestoprovethecopyrightprotection.Thechoiceofthecharacteristicvaluesdependsonthechoiceofacryptographickeyknownbytheownerofthebitmap.Thebenefitofusingacryptographickeyistocomginethewatermarkswiththebitmapinahighsecureway.

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简介：一个新奇optical-spectrum-encoded(OSE)analog-to-digital变换器(模数转换器)在这个字母被建议。简单地例示变换想法，5位的设备结构由Fabry-Perot干涉仪(FPI)组成了被分析并且数字地模仿了。在电镀物品光的FPI的调整电压上的山峰传播波长的依赖和在FPI的事件光波长上的播送功率的依赖被讨论并且利用了实现OSEADC。线性地悦耳的锁模式的激光作为一个电压波长变压器和一个刺绣花样，并且作为一个编码器数组，啁啾的栅栏FPI能被用来获得许多更大的采样率和小点决定。CLC数字TH867+.91

简介：AnapproachisproposedtorealizeadigitalchannelizedreceiverinthefractionalFourierdomain(FRFD)forsignalinterceptapplications.ThepresentedarchitecturecanbeconsideredasageneralizationofthatinthetraditionalFourierdomain.Sincethelinearfrequencymodulation(LFM)signalhasagoodenergyconcentrationintheFRFD,bychoosinganappropriatefractionalFouriertransform(FRFT)order,thepresentedarchitecturecanconcentratethebroadbandLFMsignalintoonlyonesub-channelandthatwillpreventitfromcrossingseveralsub-channels.Thustheperformanceofthesignaldetectionandparameterestimationafterthesub-channeloutputwillbeimprovedsignificantly.Thecomputationalcomplexityisreducedenormouslyduetotheimplementationofthepolyphasefilterbankdecomposition,thustheproposedarchitecturecanberealizedasefficientlyasintheFourierdomain.Therelatedsimulationresultsarepresentedtoverifythevalidityofthetheoriesandmethodsinvolvedinthispaper.

简介：Digitalcircuitsoperatinginthesub-thresholdregimeconsumetheleastenergy.Thestrictenergyconstraintsaredesiredintheapplicationswhichworkatthelowestpossiblesupplyvoltage.Ontheotherhand,theconventionaldesignflowutilizesthetechnologylibraryprovidedbythefoundrywithafixedvoltageboundary,whichcausesproblemswhenthesupplyscalesdowntothesub-thresholdregime.Inthispaper,wepresentadesignmethodologytocharacterizetheexistingcelllibrarywithLibertyNCXtofacilitatethestandarddesignflow.Itisdemonstratedin0.13mcomplementarymetal-oxide-semiconductor(CMOS)technologywiththesupplyvoltageof300mV.

简介：Inthispaper,spatiallyangularmultiplexingtechniqueinpulseddigitalholographyandanopticalsystembasedonthistechniqueareintroduced.Opticalsimulationandcalculatinganalysisshowthatthedesignedsystemcanbeemployedtorecordultra-fasteventsofatimeresolutioninnanosecond.

简介：Thewide-banddigitalreceivingsystemsrequiredigitaldownconversion(DDC)withhighdatarateandshorttuningtimeinordertointerceptthenarrow-bandsignalswithinbroadtuningbandwidth.ButtheserequirementscannotbemetbythecommercialDDC.Inthispaperanefficientimplementationarchitectureispresented.ItcombinestheflexibilityofDFTtuningwiththeefficiencyofthepolyphasefilterbankdecomposition.Byfirstdecimatingthedatapriortofilteringandmixing,thisarchitecturegivesabettersolutiontothemismatchbetweenthelowerhardwarespeedandhighdatarate.Thecomputersimulationsshowthefeasibilityofthisprocessingarchitecture.

简介：Thesolarphotovoltaic(PV)moduleoutputvoltagechangesaccordingtothevariationoflightintensityandtemperature.ThispaperpresentstheimplementationofanautomaticdigitalcontrollerofaDC-DCboostconverterwithoutbatteriesforasolarcellmodulebyusingaperipheralinterfacecontroller,whichformsaclosedloop,tocontroltheON-OFFperiodoftheswitchingpulse.TheoutputofDC-DCconverterismaintainedbyautomaticallyincreasingordecreasingthepulsewidth.Toproducethepulsewidthmodulation(PWM),themicrocontrollerisprogrammedaccordingtotherequireddutycycleforthepowerswitch.ThePWMONperiodisincreasedwiththedecreaseinthePVvoltageandvice-versa.TheinputvoltagetotheinverterismaintainedconstantlyandisconvertedintoanACsignalbyusingthemetal-oxide-semiconductorfieldeffecttransistor(MOSFET)H-bridgeoperatedinthesinusoidalpulsewidthmodulationmodebyusingaPIC(peripheralinterfacecontroller)microcontroller.ThegeneratedACsignalcanbeconnectedtotheACgridortotheACload.ThesimulatedresultsbyusingProteus8andhardwareimplementedresultsverifytheeffectivenessoftheproposedcontroller.

简介：Inthispaper,thecloserelationshipamongwavelettransformandquadraturemirrorfilter(QMF)banksandthescattering-matrixofwavedigitalfilter(WDF)isandlyzedindetail.TheparametrizationoforthonormalcompactlysupportedwaveletbasesthathaveanarbitrarynumberofvanishingmomentisobtainedbybuildinganyQMFpairoutofelementaryfactorsofthescatteringmatrix.Inaddition,theoptimizationofparameterisalsopresented.Ascomparison,Someexamplesaboutorthonormalcompactlysupportedwaveletthathasarbitrarynumberofvanishingmomentandthemostnumberofvanishingmomentaregivenrespectively.Thenwegivetheefficientlatticestructuretoimplementthetransform.

简介：Twosignaturesystemsbasedonsmartcardsandfingerprintfeaturesareproposed.Inonesignaturesystem,thecryptographickeyisstoredinthesmartcardandisonlyaccessiblewhenthesigner'sextractedfingerprintfeaturesmatchhisstoredtemplate.Toresistbeingtamperedonpublicchannel,theuser'smessageandthesignedmessageareencryptedbythesigner'spublickeyandtheuser'spublickey,respectively.Intheothersignaturesystem,thekeysaregeneratedbycombiningthesigner'sfingerprintfeatures,checkbits,andarememberablekey,andtherearenomatchingprocessandkeysstoredonthesmartcard.Additionally,thereisgenerallymorethanonepublickeyinthissystem,thatis,thereexistsomepseudopublickeysexceptarealone.

简介：AkindofarchitectureofTime-to-DigitalConverter(TDC)forUltra-WideBand(UWB)applicationispresented.TheproposedTDCisbasedonpulseshrinking,andimplementedinaFieldProgrammableGateArray(FPGA)device.ThepulseshrinkingisrealizedinaloopcontainingtwoProgrammableDelayLines(PDLs)oratwo-channelPDL.Oneline(channel)delaystherisingedgeandtheotherline(channel)delaysthefallingedgeofacirculatingpulse.DelayresolutionofPDLisconvertedintoadigitaloutputcodeunderknownconditionsofpulsewidth.Thisdelayresolutionmeasurementmechanismisdifferentfromtheconventionaltimeintervalmeasurementmechanismbasedonpulseshrinkingofconversionofunknownpulsewidthintoadigitaloutputcode.Thismechanismautomaticallyavoidstheinfluenceofunwantedpulseshrinkingbyanycircuitelementapartfromthelines.TheachievedrelativeerrorsforfourPDLsarewithin0.80%–1.60%.

简介：上周．EFI公司在伦敦举行的产品展示会上推出自己最新的DigitalStoreFront（DSF3．0）网络到印刷（web-to-print）软件。

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