简介:Inthispaper,anewadaptiveoptimalguidancelawwithimpactangleandseeker’sfield-of-view(FOV)angleconstraintsisproposed.Tothisend,thegeneralizedoptimalguidancelawisderivedfirst.Achangeableimpactangleweighting(IAW)coefficientisintroducedandusedtomodifytheguidancelawtomakeitadaptiveforallguidanceconstraints.Afterintegratingtheclosed-formsolutionoftheguidancecommandwithlinearizedengagementkinematics,theanalyticpredictivemodelsofimpactangleandFOVanglearebuilt,andtheavailablerangeofIAWcorrespondingtoconstraintsiscertain.Next,acalculationschemeispresentedtoacquirethereal-timevalueofIAWduringtheentireguidanceprocess.Whenapplyingtheproposedguidancelaw,theIAWwillkeepsmalltoavoidatrajectoryclimbinguptolimitFOVangleataninitialtimebutwillincreasewiththeclosingtargettoimproveimpactpositionandangleaccuracy,therebyensuringthattheguidancelawcanjuggleordersofguidanceaccuracyandconstraintscontrol.
简介:这研究调查堵塞的multitone的频率偏移量怎么影响调音的快跳跃频率的二进制频率移动(FFH/BFSK)自我使添加剂白人Gaussian噪音(AWGN)正常化(SNZ)在\O下面的接收装置。FFH/BFSKSNZ接收装置的平均bit-error-rate(BER)表情和有频率的通讯系统multitone抵消为理解模拟更好结果的缘故堵塞的FFH/BFSK传播光谱(SS)的普通BER表情。当堵塞力量是中等的时,有在堵塞的最糟的casemultitone(MTJ)和AWGN下面的差异的FFH/BFSKSNZ接收装置的BER性能受不了multitone堵塞的模拟结果表演是频率偏移量,它被几模拟验证,不同频率偏移量在堵塞的multitone设置了。因此,在堵塞的multitone下面的FFH/BFSKSNZ接收装置能在堵塞的multitone的频率偏移量的帮助下被作斗争。
简介:UnlikethepreviousresearchworksanalyzingthestabilityoftheT-S(Takagi?Sugeno)fuzzymodel,anextensiononthestabilityconditionofT-Sfuzzysystemswithadifferentstrategyisprovided.Inthestrategyanewvariable,whichisrelativetothegradeoffuzzymembershipfunction,isintroducedtothestabilityanalysisandanewstabilityconclusionisdeduced.Thedefinitionofstabilityconditioninthispaperisdifferentfrompreviousworks,thoughtheyaresimilarinform.Withtheproposedmethod,thesimulationinflightcontrollawshowsabettereffectiveness.
简介:RFLDMOSs}/率管具有高输出功率、高增益、高线性、良好的热稳定性等优点,广泛应用于移动通信基站、数字广播电视发射以及射频通信领域、微波雷达系统。阻抗匹配是LDMOS~率管应用电路设计的关键任务,LDMOS功率管匹配电路的主要任务是实现功率管的最大功率传输。文中选择中国电子科技集团公司第58研究所研制的S波段10wLDMOS功率管,利用微波仿真工具ADS设计外匹配电路。经过精心调试后,s波段LDMOSs}/率管输入回波损耗、增益、输出功率、效率、谐波等技术指标达到设计要求。完成匹配电路设计的S波段LDMOS功率管在3.1~3.4GHz频率范围内,输出功率大于13.8W,功率增益大于12.4dB,效率大于37.9%。
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:S乐队获得从1488nm与带宽弄平分布式的纤维拉曼放大器到1541nm(在宽度的53nm),10dB的平均获得和卤0.6dB的获得涟漪成功地被获得,在哪个当泵和啁啾的纤维布拉格栅栏被用作变平的获得,有1427.2nm的波长的单个波长的高力量纤维拉曼激光被使用过滤器。而且,过滤波长分割更复合(FWDM)被用作更复合的多信号和1427nm/1505nm粗糙的波长分割更复合(CWDM)被用作泵信号coupler。获得媒介是在长度和在长度的5km的分散赔偿纤维(DCF)的50km的G652纤维。而且,获得变平引起的纤维和效果的不同类型的地点安排象他们的答案一样过滤详细被讨论。扩大光纤维通讯乐队的范围并且为特别增加纤维通讯的能力是很重要的极端长拖并且超离频能力通讯系统。CLC数字TN253文件代码A这个工作被浙江省的大科学研究工程支持,P.R。中国(号码021101558)和科技的部,工程的部分朝鲜中国光技术研究中心资助的朝鲜。
简介:Inthispaper,awavelengthdivisionmultiplexing(WDM)transmissionsystemderivedfromthecoherentopticalorthogonalfrequencydivisionmultiplexing(CO-OFDM)withpolarizationdivisionmultiplexing(PDM)and16-orderquadratureamplitudemodulation(QAM)isstudied.Asimulationof80-channelWDMtransmissionsystemwithdatarateof200Gbit/sisbuilt,andthetransmissionperformanceofthesystemisanalyzed.ThesimulationresultsshowthatthesystemQvalueoftheWDMchannelsat16Tbit/swithaspectralefficiencyof7.14bit/s/Hzispotentiallyover10.0dBforalonghaultransmissionupto1800kminastandardsingle-modefiber.
简介:AnewS-typeoferbium-ytterbiumco-dopedphosphateglasswaveguideamplifierintegratedwithcascadedmultilayermediumthinfilmfilterisproposed,thisS-typegeometrywaveguidestructureisusedtoachievealongpathinacompactchip,andobtainedhighergainwithlowerEr-dopedconcentration.Thecascadedmultilayermediumthinfilmfilterisutilizedtoachieveabroaderflatteninggainbandwidth.Theintrinsicalgainspectrumisobtainedbysolvingrateandpowerpropagationequations,theeffectoftransmittancespectrumofthinfilmfilteronflatteninggainisdiscussed.