简介：Theperformanceofmassivemultiple-inputmultiple-output(MIMO)systemislimitedbypilotcontamination.Toreducethepilotcontamination,uplinkanddownlinkprecodingalgorithmsareputforwardbasedoninterferencealignmentcriterion.Intheuplinkreceivingprocessing,thetargetfunctionalignsthepilotcontaminationandtheinterferencesignalstothesamenullspaceandacquiresthemaximalspacedegreeofthedesiredsignals.Theuplinkreceivingprecodingmatrixissolvedonmaximalsignaltointerferenceplusnoiseratio(SINR)criterionconsideringtheimpactofthepilotcontaminationonchannelestimations.Theuplinkreceivingprecodingmatrixisusedasthedownlinktransmittingprecodingmatrix.Exploitingthechannelreciprocity,itisprovedthat,iftheuplinkreceivingprecodingmatrixachievesmaximalSINR,theidenticalprecodingmatrixcanbeusedinthedownlinktransmissionandacquiresmaximalsignaltoleakageplusnoiseratio(SLNR).Simulationsshowthatthespectrumefficiencyoftheproposedalgorithmcanreachabout1.5timeshigherthanthatofpopularmatchedfiltering(MF)precodingalgorithm,andabout1.1timeshigherthanmulti-cellminimummeansquareerror(MMSE)precodingalgorithm.Theperformanceoftheproposedalgorithmcanbeimprovedapproximatelylinearlywiththeincreasingofthenumberofantennas.

简介：ＩＮＴＥＲＦＥＲＥＮＣＥＣＨＥＣＫＩＮＧＩＮＣＯＭＰＵＴＥＲ－ＡＩＤＥＤＰＬＡＮＴＤＥＳＩＧＮＳＹＳＴＥＭＷａｎｇＦｅｎｇＺｈａｏＨｏｎｇＮｉｕＪｕｎｙｕＡｂｓｔｒａｃｔＩｎｔｈｉｓｐａｐｅｒ，ｔｈｅｉｎｔｅｒｆｅｒｅｎｃｅｃｈｅｃｋｉｎｇｏｆｔｈｒ...

简介：Byusingthemodernlydevelopedtechniquesofpossibilityandset-valuedstatistics,thispaperdeter-minedthethresholdsofvariouscategoriesofnoiseannoyanceanddefinedthedose-responserelationbe-tweenthelevelsofnoiseandtheirannoyance.Threefactorscontrolledintheexperimentweretypesofnoise:impulseandtraffic;levelofnoise:5Leqfrom45—85dB（A）;andperformancetask:withandwithoutspeechrecognition.NoiseinterferencewithspeechrecognitionwasmeasuredwiththeSDTmethod.Ourex-perimentalresultsshowedthatLeqofimpulsenoiseshouldbehigherthanthatoftrafficnoisetogetequalannoyance;thespeechrecognitiontaskmightlightentheexperienceofannoyance;thehigherthelevelofnoise,themoreitsinterferencewiththespeechrecognition,thatis,thelessthevalueofd′.

简介：Inthisletter,weproposeahybridanalog/digitaldetectionalgorithm,theCorrelatedIn-terferenceCancellation(CIC)algorithm,forImpulseRadioUltra-WideBand(IR-UWB)system.TheCICalgorithmcorrelatesreceivedsignalwithitsdelayedversionsintheanalogdomainandsamplesthecorrelationoutputatthesymbolrate.Thesymbolratesamplesareprocessedinthedigitaldomaintoperforminterferencecancellation.Therefore,CICworksforhighdataratesystemswithheavyIn-terSymbolInterference(ISI).SimulationresultsshowthatCICachievesgoodperformanceintypicalUWBchannels.

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简介：Quantumbeatscanbeproducedinfourth-orderinterferencesuchasinaHong–Ou–Mandel(HOM)interferometerbyusingphotonswithdifferentfrequencies.HerewepresenttheoreticallytheappearanceofinterferenceofquantumbeatswhentheHOMinterferometeriscombinedwithaFranson-typeinterferometer.Thiscombinationcanmaketheinterferenceeffectofphotonswithdifferentcolorstakeplacenotonlywithinthecoherencetimeofdownconvertedfieldsbutalsointheregionbeyondthat.Weexpectthatitcanprovideanewmethodinquantummetrology,asitcanrealizethemeasurementoftimeintervalsinthreescales.

简介：Multimode干扰(MMI)设备广泛地在平面lightwave电路(PLC)被使用。设备长度能很好与逐渐变细的multimode区域被减少。传统的设计公式基于弱限制的波导为MMI设备显示出大错误。作为波导宽度的替换与模式宽度基于分析，有更好的精确的一个设计公式被介绍。有软件模拟的比较验证了它的精确。CLC数字TN256

简介：Anadaptiveinterferencecancleralgorithmbasedonfourth-ordercumulantisproposedtoovercomethefaultofconventionalautocorrelation-basedLeastMeanSquare(LMS)algorithmwhichcannotsuppressthecorrelatedGaussiannoises.Therecursiveformulationoftheproposedalgorithmisgiventoreduceitscomputationalcomplexity.Thesimulationresultsarepresentedtodemonstratetheeffectivenessofthisnovelapproach.

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简介：基于self-imaging效果，multimode干扰(MMI)有区域调整的光开关被建议。地转移矩阵被介绍分析MMI开关。作为一个例子，3脳的阶段调整参数为不同切换的盒子的3MMI开关被解决域转移方程获得。并且有限差别的横梁繁殖方法(FD-BPM)被用来证实分析结果。CLC数字TN256不到资助号码200506由shenzhen大学的科学研究开始基础支持了。

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简介：Weproposeanddemonstrateanultrasensitiveintegratedphotoniccurrentsensorthatincorporatesasiliconbasedsingle-mode-multimode-single-modewaveguide(SMSW)structure.ThiskindofSMSWstructureisplacedoveradirectcurrentcarryingpowerresistor,whichproducesJoule’sheattochangethetemperatureoftheSMSWandfurtherresultsinthechangeoftheeffectiverefractiveindexbetweendifferentpropagatingmodes.Interferenceoccurswhenthemodesrecombineatthesecondsinglemodewaveguide.Finally,thecurrentvariationismeasuredbymonitoringtheshiftintheoutputspectrumofthemultimodeinterferometer.Inlowcurrent,thewavelengthshifthasalmostlineardependence:Δλ∝Ic.Thiseffectcanbeusedasacurrentsensorwithaslopeefficiencyof4.24nm/Aintherangeof0–200mA.

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简介：试验性的调查被执行在在平静的水里进展的一个pentamaran模型的全部的抵抗上估计干扰性能的关系。为这动机，总数轮船拖为不对称的悬臂梁配置和壳分离的几价值被执行，在范围0.3-0.9改变弗鲁德数字。当波浪干扰可以发生时，我们的结果显示在抵抗的显著变化在横向的距离价值(壳分离)要求著名变化。另外，没有单个配置，一致地越过全部速度范围和最佳干扰因素超过另外的配置0.2与悬臂梁在S/L=0.33出现在0.45的一个弗鲁德数字外部位置：不对称为A3配置舷外。

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简介：Theabilitytomodulateanopticalfieldviaanelectricfieldisregardedasakeyfunctionofelectro-opticinterconnects,whichareusedinopticalcommunicationsandinformation-processingsystems.Oneofthemaindevicesrequiredforsuchinterconnectsistheelectro-opticmodulator(EOM).CurrentEOMsbasedonelectro-opticandelectro-absorptioneffectsoftenarebulkyandpower-inefficientduetotheweakelectro-opticpropertiesoftheirconstituentmaterials.Here,weproposeanewmechanismtoproduceanarbitrary-waveformEOMbasedonquantuminterference,inwhichbothrealandimaginarypartsofthesusceptibilityareengineeredcoherentlywithsuper-highefficiency.BasedonthisEOM,awaveforminterconnectfromthevoltagetothemodulatedopticalabsorptionisrealized.Weexpectthatsuchanewtypeofelectro-opticinterconnectwillhaveabroadrangeofapplications,includinginopticalcommunicationsandnetworks.

简介：Byusingtwo-directionalS-roughsets,theconceptsof(f,f)-interferencegenerationand(f,f)-inter-ferencelawgenerationofknowledge,F-interferencegenerationandF-interferencelawgenerationoftwo-directionalS-roughsetsareproposed.Basedontheconceptsabove,therelationtheoremsbetweenF-interferencelossandF-interferencedegree,therelationtheoremsbetweenF-interferencelosslawandF-interferencedegreelaw,thediscernibilitytheoremsbetweenF-interferenceandF-interferencelawarepresented.Atlast,therecognitioncriterionofF-interferencelawanditsapplicationaregiven.

简介：Asystemofunequalthicknessinterferencefilterswithquarterwavelengthstackwhichconsistsofaspacersurroundedbytwomultilayerstacksisdesigned,andtheexamplesofthefilterdesignaregiven.Thiskindoffiltersarenotonlycharacterizedbyhigh-transparency,butalsobyhigh-reflection,therefore,itissuperiortothecommonequalthicknessinterferencesystemwithquarterwavelength.Itiseasiertocontrolthemanufacturingtechniquesofthenewdesignascomparedwiththatofinterferencefilterofnon-quarterwavelength.