北京锦坤科技有限公司
主营产品: 射频光纤传输模块-微波光纤传输模块-RF over Fiber-微波光纤延迟线-雷达目标模似器 |
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北京锦坤科技有限公司
主营产品: 射频光纤传输模块-微波光纤传输模块-RF over Fiber-微波光纤延迟线-雷达目标模似器 |
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2012-10-31 阅读(1374)
提 供 商 | 北京锦坤科技有限公司 | 资料大小 | 241.1KB |
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(详细介绍见PDF文件)
摘要:实验研究了一种基于相位调制器(PM)并级联强度调制器(IM)实现40 GHz毫米波传输正交频分复用(OFDM)信号的光纤无线通信(ROF)系统。在中心站,采用20GHz的射频(RF)信号驱动PM,调节驱动信号的强度,使输出的信号经光纤布拉格光栅(FBG)滤除中心载波后再送入IM。2.5 Gbit/ s的OFDM信号直接调制在光毫米波上,经过
关键词:光纤无线通信(ROF) ; 光毫米波信号; 相位调制器(PM) ; 正交频分复用(OFDM)
中图分类号:TN929.11;TN761 文献标识码:A 文章编号:100520086(2010)0320383204
Experimental researchabouta40GHzorthogonal frequencydivi2 sionmultiplexingradio2over2fiber systembasedonoptical phase modulator
LI Zhi2lan, CAOZi2zheng, DONGZe, CHENLin 33
(KeyLaboratoryof Micro/ NanoOptoelectronicDevicesof EMC,School of Computer andCommunication,HunanUniversity,Changsha,410082,China)
Abstract:Wedemonstratea40 GHzradio2over2fiber systemusinganoptical phasemodulatoralongwith anintensitymodulatortogenerateanoptical millimeter2wavewithOFDMsignals. Inthecentral station,40 GHzoptical millimeter2wavewithOFDMsignals is generatedbyusinganoptical phase modulator
whichis drivenbythe20 GHzRFsignals. Thentheoptical carrierisfilteredout byanFBG.2.5 Gbit/s OFDMsignalsaremodulatedon40 GHzoptical
mm2wavedirectlyandtransmittedtothebasestation over50kmstandardsingle2modefiber(SSMF). Inthebasestation,theoptical mm2wavesignalsarecon2 vertedtoelectrical signalsafteroptical2electrical conversion,andthedown2convertedOFDMsignals are detectedafter mixingwiththelocal oscillators. Theexperimental results showthat at the BERof 10 23 andwithout dispersioncompensation,thepowerpenaltyof thedownlinkOFDMsignalstransmittedover 50kmSMF228islessthan1dB,andtheconslationfigureis still good.