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北京錦坤科技有限公司
主營(yíng)產(chǎn)品: 射頻光纖傳輸模塊-微波光纖傳輸模塊-RF over Fiber-微波光纖延遲線-雷達(dá)目標(biāo)模似器 |
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聯(lián)系電話
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北京錦坤科技有限公司
主營(yíng)產(chǎn)品: 射頻光纖傳輸模塊-微波光纖傳輸模塊-RF over Fiber-微波光纖延遲線-雷達(dá)目標(biāo)模似器 |
聯(lián)系電話
2012-10-31 閱讀(1562)
提 供 商 | 北京錦坤科技有限公司 | 資料大小 | 241.1KB |
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資料圖片 | 下載次數(shù) | 499次 | |
資料類型 | PDF 文件 | 瀏覽次數(shù) | 1562次 |
(詳細(xì)介紹見PDF文件)
摘要:實(shí)驗(yàn)研究了一種基于相位調(diào)制器(PM)并級(jí)聯(lián)強(qiáng)度調(diào)制器(IM)實(shí)現(xiàn)40 GHz毫米波傳輸正交頻分復(fù)用(OFDM)信號(hào)的光纖無線通信(ROF)系統(tǒng)。在中心站,采用20GHz的射頻(RF)信號(hào)驅(qū)動(dòng)PM,調(diào)節(jié)驅(qū)動(dòng)信號(hào)的強(qiáng)度,使輸出的信號(hào)經(jīng)光纖布拉格光柵(FBG)濾除中心載波后再送入IM。2.5 Gbit/ s的OFDM信號(hào)直接調(diào)制在光毫米波上,經(jīng)過
關(guān)鍵詞:光纖無線通信(ROF) ; 光毫米波信號(hào); 相位調(diào)制器(PM) ; 正交頻分復(fù)用(OFDM)
中圖分類號(hào):TN929.11;TN761 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):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.