简介:Transmissionperformanceofelectroabsorptionmodulatorin10Gb/stransmissionsystemshasbeensimulatedandanalyzedundertheconditionoftakingintoaccountthechirp,extinctionratio,transmissivityandrise/falltime.ResultsshowthatshorttransmissiondistancewithoutEDFAafterEAMcanbeusedinfuturemetropolitanareanetwork,butthetransmissivitymustbecarefullyconsidered.Thesamplingtimerangeanddecisionlevelcanbeoptimizedtoreducethebiterrorratio.
简介:Inthispaper,anewmodelbasedonanimprovedBrentKung(BK)parallelprefixnetwork(PPN)algorithmisproposedandrealizedinthefieldprogrammablegatearray(FPGA).Thismodelisemployedintheimplementationof20Gb/sdifferentialquadraturephase-shiftkeying(DQPSK)precoderin40Gb/spolarizationdivisionmultiplex(PolDM)DQPSKsystem.Inthecomputationprocess,thecomputationcomplexity(area)optimizationwithfan-outlimitedisachieved.Intheimplementation,770FPGAsliceregistersareutilized,whichsaveabout60%logicresourcescomparedwiththepreviousKoggeStone(KS)algorithm.
简介:Anultra-highspeed1:2demultiplexerforopticalfibercommunicationsystemsisdesignedutilizingtheIHP0.25μmSiGeBiCMOStechnology.Thelatchofthedemultiplexercorecircuitisresearched.Basedonthecurrentmeasurementcondition,ahigh-gainandwide-bandwidthclockbufferisdesignedtodrivelargeload.Transmissionlinetheoryforultra-highspeedcircuitsisusedtodesignmatchingnetworktosolvethematchingproblemamongtheinput,outputandinternalsignals.Thetransientanalysisshowsthatthisdemultiplexercandemultiplexone100Gb/sinputintotwo50Gb/soutputs.Thechipareaofitis0.7mm×0.47mm,theinputandoutputdataarebothat400mVP-PPCMLstandardvoltagelevel,andthepowerconsumptionoftheICis900mWatthepowersupplyof-4V.
简介:班1822152019刀233536262425鲜291932111﹃1︸内J4r‘.J11,山月峙,J月t浦呀,‘月峪·工作研讨‘贯彻中央十五届五中全会精神,加快发展我国信息产业—曲维枝副部长在2(XX】年电子百强企业工作会议盛信息产业企业管理与决策高级研讨会上的讲话.....................·..······························……4(2)江沛泉浅谈高温推板窑的节能措施皮乐民刘群节能型超高温推板式电窑的节能效果及经济效益董宝舰胡志东·电子技术应用·IC卡电能表的计算机管理系统.........··一..…:..····
简介:TherehavebeenseveralmethodsfordeterminingTwave-end.ButnoneofthemcanovercomethedifficultyfrommultiformityofECGsignalpattern.Inthispaper,amethodfordeterminingTwave-endusingevolutionaryalgorithm(EA)isproposed.Inthisway,first,everycharacteristicparameterrelatedtoTwave-endisencodedtoastringofcodes,andadaptationfunctionisconstructedwiththestringofcodes.Thenchoosetheindividualaccordingtotheadaptationfunctionvalueanddogeneticoperation(reproduction,crossoverandmutation),soastoproduceoffspringwithmoreadaptationfunctionvalue.BecauseofEA'sautoadaptationandautoorganizationcharacter,itcantraceECGsignaltypeandfindtheTwave-endautomatically.ExperimentresultsshowthattheerrorratioofrecognizingTwave-endusingthismethodismuchsmallerthanthatusingexistingmethod.