简介：Multilevelphotoncombinedwithbinarypulsepositionmodulation(BPPM)(Manchesterpulsedsignals),isintroducedinthisletter.Initially,errorprobabilityderivationandexplanationforfour-levelphotoncommunicationswiththatBPPMispresented.Next,the2-levelphotoncommunicationsmatchingwithBPPMisproposed.Forperformancecomparison,itisdonewiththattheconventionalschemebyfxingthebackgroundnoiseandalsoincreasingnumberofphotonperslot.Successfullywithapplyingconvolutionalcodingforsystemimproving,theproposedmultilevelphotononBPPMwiththiscodingschemeachieveshighergain.Finally,thisworkalsobeneftstoimprovingforfurtherperformancewhenconsideringwithmultilevelerrorcontrolcodingaswell.

简介：在这封信，空间光(FSO)用有图案的调整和桶察觉的通讯被介绍在复杂、吵闹的环境改进位错误率(BER)性能。散布的光在这通讯结构被平均。秒顺序关联，小浪正规化，并且察觉到压缩在重建算法被联合。有N位的一个信号从大部分被重建很好不到N大小。没有光过滤器在传统的FSO通讯使用了的narrowband，数字模拟和实验被执行。它能也在安全通讯被要求的真实网络被采用。这提供大机会为FSO通讯的真实应用铺平道路。

简介：Weproposetheuseofapowerpulseshapeofthewidelyknownopticalsoliton,correspondingtothehyperbolicsecantsquarefunction,forbothconventionalatmosphericopticalcommunicationsystemsand,especially,fornewfull-opticalwirelesscommunications.Weanalyzetheperformanceoftheproposedpulseintermsofpeak-to-averageopticalpowerratio(PAOPR)andbiterrorrate(BER).Duringtheanalysis,wecomparetheproposedpulseshapeagainstconventionalrectangularandGaussianpulseshapeswithreduceddutycycle.Resultsshowthenoticeablesuperiorityoftheproposedpulseforatmosphericopticallinks.

简介：Toachievelowerassemblydelayatopticalburstswitchingedgenode,thispaperproposesanapproachcalledcurrentweightlengthprediction(CWLP)toimproveexistingestimatemechanisminburstassembly.isintroducedtomakeadynamictradeoffbetweenthecurrentandpasttrafficunderdifferentoffsettime.SimulationresultsshowthatCWLPcanachieveasignificantimprovementintermsoftrafficestimationinvariousoffsettimeandofferedload.

简介：Anopticalsignal-to-noiseratio(OSNR)awarelightpathprovisioningmechanism(OSNR-LPM)isproposedfordistributedopticalnetworks.ThisOSNR-LPMtakestheOSNRvalueofthelightwavealongthelightpathintoconsiderationwhenestablishingthelightpathfortheconnectionrequestusingresourcereservationprotocol-trafficengineering(RSVP-TE).Moreover,theOSNR-LPMmakesfulladvantagesoftheOSNRmonitoringfunctionineachnodeandassignsthelightwavebyjudgingtheOSNRvaluecarriedbythesignalingmessageinordertoguaranteethereliableestablishmentofthelightpathinthedataplane.ThesimulationresultsshowthattheOSNR-LPMoutperformsotherlightpathassignmentmechanismsintermsofrealblockingprobabilityinthedataplane.

简介：我们由把一种适应传播技术与直角的频率部门multiplexing相结合建议并且试验性地示威一个简单可见轻通讯系统。在适应传播计划，力量分配以如此的一个方法被执行至于在电力限制，和适应调整下面最大化隧道能力然后被介绍完成给目标小点错误率的最大的数据率。试验性的结果证明光谱效率能极大地通过这种适应传播技术被改进。

简介：Anexperimentofadaptivepolarizationmodedispersion(PMD)compensationfor40-Gb/sreturn-to-zero(RZ)opticalcommunicationsystemisreported.Intheexperiment,degreeofpolarization(DOP)isusedasfeedbacksignalandparticleswarmoptimization(PSO)methodisadoptedaslogiccontrolalgorithm.Thecompensationtimeisabout200ms,thecompensateddifferentialgroupdelay(DGD)isupto30ps,andbiterrorrate(BER)of10^-9isreachedwhenPMDcompensationisemployed.

简介：我们基于用与一个二进制树分类器相结合的高顺序的周期的cumulant察觉到压缩建议调整格式鉴定的一个方法。通过计算，pretreated乐队信号的第四顺序的周期的cumulant，它被获得由压缩了很与采样率察觉到不到Nyquist采样值，为分类的特征向量被提取。模拟与多重阶段移动调音和多重照振幅调整的不同调整格式在光协调纤维通讯系统被执行。结果显示这个方法能正确地并且高效地识别这些调整格式。同时，建议方法对激光阶段噪音和信号噪音感觉迟钝。

简介：Thestablemulticastflowaggregation(MFA)problemininternetprotocol(IP)overopticalnetworkunderthedynamicalscenarioisstudied.Givenanopticalnetworktopology,thereisasetofheadendsandaccessroutersattachedtotheopticalnetwork,inwhicheachheadendcanprovideasetofprograms(IPmulticastingflows)andeachaccessrouterrequestsasetofprograms,wefindasetofstablelight-treestoaccommodatetheoptimallyaggregatedmulticastIPflowsiftherequestsofaccessrouterschangeddynamically.Weintroduceaprogramcorrelationmatrixtodescribethepreferenceofendusers'requests.AstheoriginalMFAproblemisNP-complete,aheuristicapproach,namedmostcorrelatedprogramfirst(MCPF),ispresentedandcomparedwiththeextendedleasttreefirst(ELTF)algorithmwhichistopology-aware.SimulationresultsshowthatMCPFcanachievebetterperformancethanELTFintermsofstabilitywithnegligibleincrementofnetworkresourceusage.

简介：Ahandveinauthenticationsysteminwhichtheidentityofanindividualcanbereadilyconfirmedupongrippingahandleisproposed.Thisrecognitionmethodincorporatesinfraredlight-emittingdiode(LED)ontoadoorhandleandsetsacharge-coupleddevice(CCD)cameraontheothersideofthehand.Itbuildsonfuzzyc-meansclusteringandparallelneuralnetworks(NNs);moreover,itisexpectedtosolvethepatternrecognitionprobleminlarge-scaledatabasesusingNNsduetoitsself-learningandparallelprocessingcapabilitiesandbyeffectivelyincorporatingtrainingpatterns.Theexperimentalresultsvalidatetheefficiencyoftheproposedalgorithm.