高性价比光纤无线通信系统的研究
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摘要
随着社会的发展,人们对通信质量的要求越来越高,希望在有限带宽中传输更多高质量的信息。光纤无线通信技术将无线通信与光纤通信结合起来,充分发挥了无线通信接入的灵活性和光纤通信能提供大容量、低成本系统的优势,在未来通信中具有强大的潜力。
光载毫米波的产生是光纤无线通信中的关键技术,通常采用MZ调制MZM(Mach-Zehnder Modulator)和相位调制器PM(Phase Modulator)来实现。PM具有低插入损耗、低电压驱动、和高效率等特点,与使用MZM相比,避免了直流漂移的影响,不需要复杂的控制电路,降低了系统成本。在系统中传输正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)信号可以消除无线通信中存在的多径效应和多普勒频移。本文研究了基于相位调制器产生光载毫米波的高性价比光纤无线通信系统,取得的创新性成果主要有：
(1)提出了一种采用两个并行相位调制器产生六倍频光载毫米波并传输OFDM信号的全双工光纤无线通信系统。将2.5Gbt/s的OFDM信号调制到60GHz光载毫米波上。从理论上分析了毫米波产生的原理,并分别模拟了毫米波信号承载不归零码NRZ(Not Return Zero)信号和OFDM信号在光纤中的传输性能,从而验证系统的可行性。
(2)提出了一种采用两个并行相位调制器产生八倍频光载毫米波方案。调制相位调制器的相移参数后,抑制频谱中的二阶边带。将两路信号经由一个功率耦合器后进行叠加,输出信号分量中只含有中心载波和两个四阶边带。从理论上对毫米波的产生进行了分析,同时通过仿真来验证了系统的可行性。
With society developing, people become more urgent to communication demand, and hoped transmits higher grade information in limited band width. Radio-over-fiber technique has fully displayed flexibility in wireless communication and provided large capacity, low cost in optical communication. It has formidable potential in future communication.
Mach-Zehnder Modulator and Phase Modulator are often used to generate optical mm-wave, which is the key technique in radio-over-fiber system. The phase modulator has low insertion loss, low voltage actuation, high efficiency, and so on, compared with Mach-Zehnder modulator (MZM), the phase modulator has no complex control circuit and direct-current drifting influence, the system cost can also be decreased. It is possible to eliminate multi-diameter effect and Doppler shift which is in wireless communication after transmitting Orthogonal Frequency Division Multiplexing (OFDM) signal in optical fiber communication system. This article mainly studied the high performance-to-price ratio radio-over-fiber system, which is based on phase modulator to generate optical millimeter -wave. The innovate work are as followed:
(1) A radio-over-fiber system with sextuple optical millimeter-wave generation by transmitting OFDM signal was proposed by two parallel phase modulators.2.5 Gbit/s OFDM signal is modulated on the optical millimeter wave with 60GHz frequency and transmitted to the base station over standard single-mode fiber. We have analyzed the generation principle and the transmission performance over fiber of optical millimeter wave generation by theory and simulation, respectively.
(2) A system with octal optical millimeter-wave' generation which is based on two parallel phase modulators was proposed. After adjusting the phase modulator's phase -shift parameter, the two step sidebands in frequency spectrum are suppressed. Carries on the superimposition two groups signals after a power coupler, there are only the central carrier and two four step sideband left. We have analyzed the generation principle and simulation the system.
光载毫米波的产生是光纤无线通信中的关键技术,通常采用MZ调制MZM(Mach-Zehnder Modulator)和相位调制器PM(Phase Modulator)来实现。PM具有低插入损耗、低电压驱动、和高效率等特点,与使用MZM相比,避免了直流漂移的影响,不需要复杂的控制电路,降低了系统成本。在系统中传输正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)信号可以消除无线通信中存在的多径效应和多普勒频移。本文研究了基于相位调制器产生光载毫米波的高性价比光纤无线通信系统,取得的创新性成果主要有：
(1)提出了一种采用两个并行相位调制器产生六倍频光载毫米波并传输OFDM信号的全双工光纤无线通信系统。将2.5Gbt/s的OFDM信号调制到60GHz光载毫米波上。从理论上分析了毫米波产生的原理,并分别模拟了毫米波信号承载不归零码NRZ(Not Return Zero)信号和OFDM信号在光纤中的传输性能,从而验证系统的可行性。
(2)提出了一种采用两个并行相位调制器产生八倍频光载毫米波方案。调制相位调制器的相移参数后,抑制频谱中的二阶边带。将两路信号经由一个功率耦合器后进行叠加,输出信号分量中只含有中心载波和两个四阶边带。从理论上对毫米波的产生进行了分析,同时通过仿真来验证了系统的可行性。
With society developing, people become more urgent to communication demand, and hoped transmits higher grade information in limited band width. Radio-over-fiber technique has fully displayed flexibility in wireless communication and provided large capacity, low cost in optical communication. It has formidable potential in future communication.
Mach-Zehnder Modulator and Phase Modulator are often used to generate optical mm-wave, which is the key technique in radio-over-fiber system. The phase modulator has low insertion loss, low voltage actuation, high efficiency, and so on, compared with Mach-Zehnder modulator (MZM), the phase modulator has no complex control circuit and direct-current drifting influence, the system cost can also be decreased. It is possible to eliminate multi-diameter effect and Doppler shift which is in wireless communication after transmitting Orthogonal Frequency Division Multiplexing (OFDM) signal in optical fiber communication system. This article mainly studied the high performance-to-price ratio radio-over-fiber system, which is based on phase modulator to generate optical millimeter -wave. The innovate work are as followed:
(1) A radio-over-fiber system with sextuple optical millimeter-wave generation by transmitting OFDM signal was proposed by two parallel phase modulators.2.5 Gbit/s OFDM signal is modulated on the optical millimeter wave with 60GHz frequency and transmitted to the base station over standard single-mode fiber. We have analyzed the generation principle and the transmission performance over fiber of optical millimeter wave generation by theory and simulation, respectively.
(2) A system with octal optical millimeter-wave' generation which is based on two parallel phase modulators was proposed. After adjusting the phase modulator's phase -shift parameter, the two step sidebands in frequency spectrum are suppressed. Carries on the superimposition two groups signals after a power coupler, there are only the central carrier and two four step sideband left. We have analyzed the generation principle and simulation the system.
引文
[1]方祖捷,叶青,刘峰等.毫米波副载波光纤通信技术的研究进展.中国激光,2006,33(4)：481-488
[2]李大治,王成友,王莹.正交频分复用(OFDM)的原理及实现.山东电子,2002,12(4)：40-42
[3]尹长川,罗涛,佟学俭.正交频分复用技术.中兴通讯技术,2003,9(1)：50-53
[4]陈林,董泽,李瑛等.采用电光调制器产生光毫米波的全双工通信光纤无线通信系统.通信学报,2007,28(9)：85-90
[5]Yu J, Jia Z, Yi L, et al. Optical millimeter-wave generation or up-conversion using external modulator. IEEE Photonic Technology Letters,2006,18(1): 265-267
[6]Xu Z, Zhang X, Yu Z. Frequency up conversion of multiple RF signals using optical carrier suppression for radio over fiber down-links. Optics Express,2007, 15(25):16737-16747
[7]Smith G, Novak D, Ahmed Z. Technique for optical SSB generation to overcome fiber dispersion penalties in fiber-radio systems. Electron Letters,1997,33(1): 74-75
[8]Qi G, Yao J, Seregelyi J, et al. Optical generation and distribution of continuously tunable millimeter-wave signals using an optical phase modulator. Light-wave Technology,2005,23(9):2687-2695
[9]Montgomery R, Desalvo R. A novel technique for double sideband suppressed carrier modulation of optical fields. IEEE Photonics Technology Letters,1995, 7(4):434-436
[10]文鸿,陈林,皮雅稚等.基于相位调制器产生光毫米波的全双工光纤无线通信系统.中国激光,2007,34(7)：935-939
[11]Yu J, Jia Z, Wang T, et al. A novel Radio-Over-Fiber configuration using optical phase modulator to generate an optical mm-wave and centralized light-wave for uplink connection. IEEE Photonics Technology Letters,2007,19(3):140-142
[12]Fabbri M, Faccin P. Radio over fiber technologies and systems:New Opportunities. In:ICTON '07 9th International Conference on Transparent Optical Networks,2007, vol.3:230-233
[13]Smith G, Novak D, Ahmed Z. Overcoming chromatic dispersion effects in fiber-wireless systems incorporating external modulators. IEEE Transmission Microwave Theory Technology,1997,45(8):1410-1415
[14]涂涛,查开德.光波-毫米波无线通信技术.光通信技术,2000,24(1)：5-12
[15]Jia Z, Yu J, Ellinas G, et al. Key enabling technologies for optical 2013 Wireless Networks:Optical millimeter-wave generation, wavelength reuse, and architecture. Light-wave Technology,2007,25(11):3452-3471
[16]Ma J, Yu J, Yu C, et al. The influence of fiber dispersion on the code form of the optical mm-wave signal generated by single sideband intensity-modulation. Optical Communications,2007,271(2):396-403
[17]Ma J, Yu C, Zhou Z, et al. Optical mm-wave generation by using external modulator based on optical carrier suppression. Optics Communications,2006, 268(1):51-57
[18]黄诚,陈林,余建军等.采用单个相位调制器产生毫米波.中国激光,2008,35(1)：73-76
[19]甘仲民,张更新,王华力等.毫米波通信技术与系统.北京：电子工业出版社,1989,22-54
[20]Wake D, Beacham K. Radio over fiber networks for mobile communications. In: Microwave and Terahertz Photonics. France,2004, vol.5466:157-160
[21]Lu J, Dong Z, Chen L, et al. High-repetitive frequency millimeter-wave signal generation using multi-cascaded external modulators based on carrier suppression technique. Optics Communications,2008,281(19):4889-4892
[22]Ma J, Xin X, Yu C. Millimeter-wave optical subcarrier generation by using an external modulator and optical carrier suppression. In:ICTON'07.9th Inter-national Conference on Transparent optical networks,2007, vol.3:273-276
[23]Chen L, Lei X, Wen S. A novel radio over fiber system with DWDM mm-wave generation and wavelength reuse for upstream data connection. Optics Express, 2007,15(9):5893-5897
[24]Chen L, Pi Y, Wen H, et al. All-Optical mm-wave generation by using direct-modulation FBD laser and external modulation. Microwave and Optical Technology Letters,2006,49(6):1265-1267
[25]Jia Z, Yu J, David B, et al. Bidirectional ROF links using optically up-converted DPSK for downstream and remodulated OOK for upstream. IEEE Photon Technology Letters,2007,19(9):653-655
[26]Murakoshi A, Tsukamoto K, Komaki S. High-performance RF signals transmission in SCM/WDMA radio-on-fiber bus link using optical FM method in presence of optical beat interference. IEEE Transmission Microwave Theory Technology,2006,54(2):967-972
[27]Yu J, Akanbi O, Luo Y, et al. An Demonstration of a novel WDM passive optical network architecture with source-free optical network units. IEEE Photonics Technology Letters,2007,19(8):571-573
[28]Bakaul M, Nirmalathas A, Lim C, et al. Hybrid multiplexing of multiband optical access technologies towards an integrated DWDM network. IEEE Photonics Technology Letters,2006,18(21):2311-2313
[29]Kawanishi T, Sakamoto T, Izutsu M. All-optical modulation format conversion from Frequency-Shift-Keying to Phase-Shift-Keying by using optical Double-Sideband modulation technique. In:Conference on Lasers & Electro-Optics (CLEO), America,2005, vol.5:4122-4135
[30]Ma J, Yu J, Yu C. Influence of the modulation index of Mach-Zehnder modulator on RoF link with ASK millimeter-wave signal. Optics & Laser Technology,2006, 41(1):11-16
[31]Kurt T, Yongacoglu A, Chouinard Y. OFDM and externally modulated multi-mode fibers in radio over fiber systems. IEEE Transactions on Wireless Communications,2006,5(10):2669-2674
[32]Lin C, Lin Y, Chen J, et al. Generation of direct-detection optical OFDM signal for Radio-Over-Fiber link using frequency doubling scheme with carrier suppression. Optics Express,2008,16(9):6056-6063
[33]王延恒,王黎明.光纤通信系统与光纤网.第一版.天津：天津大学出版社,2007,1-3
[34]李蔷薇.移动通信技术.第一版.北京：北京邮电大学出版社,2006,9-14
[35]秦海璐.无线光纤系统中新型毫米波生成技术的研究：[上海大学硕士学位论文].上海：上海大学,2006,1-5
[36]Stephens W, Joseph T. System characteristics of direct modulated and externally Journal of modulated RF fiber-optic links. Light-wave Technology,1987,5(3): 380-387
[37]Lin C, Lin Y, Chen J, et al. Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression. Optics Express,2008,16(9):6056-6057
[38]Yao J, Maury G, Li Y, et al. All-optical subcarrier frequency conversion using an electrooptic optical phase modulator. IEEE Photonics Technology Letters,2005, 17(11):2427-2429
[39]廖丰卓,周涛,杨亚培.光生毫米波技术.光电子技术,2006,43(12)：53-55
[40]裴军,余重秀,马健新等.ROF系统中毫米波产生方法的研究.通信技术及应用,2007,12(9)：45-47
[41]杨湘云,胡薇薇,徐安士.毫米波ROF光通信系统中信号传输色散影响的研究.北京大学学报,2006,42(3)：401-405
[42]Govind P. Nonlinear Fiber Optics & Application of Nonlinear Fiber Optics.贾东方,余震虹,谈斌,胡智勇等译.第一版.北京：电子工业出版社,2002,7-12
[43]张宝富,刘忠英,万谦等.现代光纤通信与网络教程.第一版.北京：人民邮电出版社,2002,31-54
[44]Jon W. Mark, Weihua Zhuang.无线通信与网络.李锵,郭继昌等译.第二版.北京：电子工业出版社,2006,10-11
[45]郭梯云,邬国扬,李建东.移动通信.第三版.西安：西安电子科技大学出版社,2005,77-85
[46]Hui R, Zhu B, Huang R, et al. Subcarrier multiplexing for High-Speed optical transmission. Journal of Light-wave Technology,2002,20(3):417-427
[47]金旗,裴昌幸,张振生.OFDM技术的基本原理.通信技术,2002,6(2)：44-46
[48]严开恩,王陆唐,黄肇明.ROF中色散对OFDM信号传输性能影响的研究.光通信技术,2005,10(5)：22-24
[49]Louis L, Michael P. The principles of OFDM. www.rfdesign.com,2001-02-12
[50]巫玮佳,严开恩,王陆唐等.关于OFDM-ROF光无线传输系统中若干问题的研究.光电子技术,2005,25(2)：90-96
[51]王文沛,陈林,董泽等.ROF系统中OOK与OFDM信号传输性能的比较.中国激光,2010,37(2)：465-470
[2]李大治,王成友,王莹.正交频分复用(OFDM)的原理及实现.山东电子,2002,12(4)：40-42
[3]尹长川,罗涛,佟学俭.正交频分复用技术.中兴通讯技术,2003,9(1)：50-53
[4]陈林,董泽,李瑛等.采用电光调制器产生光毫米波的全双工通信光纤无线通信系统.通信学报,2007,28(9)：85-90
[5]Yu J, Jia Z, Yi L, et al. Optical millimeter-wave generation or up-conversion using external modulator. IEEE Photonic Technology Letters,2006,18(1): 265-267
[6]Xu Z, Zhang X, Yu Z. Frequency up conversion of multiple RF signals using optical carrier suppression for radio over fiber down-links. Optics Express,2007, 15(25):16737-16747
[7]Smith G, Novak D, Ahmed Z. Technique for optical SSB generation to overcome fiber dispersion penalties in fiber-radio systems. Electron Letters,1997,33(1): 74-75
[8]Qi G, Yao J, Seregelyi J, et al. Optical generation and distribution of continuously tunable millimeter-wave signals using an optical phase modulator. Light-wave Technology,2005,23(9):2687-2695
[9]Montgomery R, Desalvo R. A novel technique for double sideband suppressed carrier modulation of optical fields. IEEE Photonics Technology Letters,1995, 7(4):434-436
[10]文鸿,陈林,皮雅稚等.基于相位调制器产生光毫米波的全双工光纤无线通信系统.中国激光,2007,34(7)：935-939
[11]Yu J, Jia Z, Wang T, et al. A novel Radio-Over-Fiber configuration using optical phase modulator to generate an optical mm-wave and centralized light-wave for uplink connection. IEEE Photonics Technology Letters,2007,19(3):140-142
[12]Fabbri M, Faccin P. Radio over fiber technologies and systems:New Opportunities. In:ICTON '07 9th International Conference on Transparent Optical Networks,2007, vol.3:230-233
[13]Smith G, Novak D, Ahmed Z. Overcoming chromatic dispersion effects in fiber-wireless systems incorporating external modulators. IEEE Transmission Microwave Theory Technology,1997,45(8):1410-1415
[14]涂涛,查开德.光波-毫米波无线通信技术.光通信技术,2000,24(1)：5-12
[15]Jia Z, Yu J, Ellinas G, et al. Key enabling technologies for optical 2013 Wireless Networks:Optical millimeter-wave generation, wavelength reuse, and architecture. Light-wave Technology,2007,25(11):3452-3471
[16]Ma J, Yu J, Yu C, et al. The influence of fiber dispersion on the code form of the optical mm-wave signal generated by single sideband intensity-modulation. Optical Communications,2007,271(2):396-403
[17]Ma J, Yu C, Zhou Z, et al. Optical mm-wave generation by using external modulator based on optical carrier suppression. Optics Communications,2006, 268(1):51-57
[18]黄诚,陈林,余建军等.采用单个相位调制器产生毫米波.中国激光,2008,35(1)：73-76
[19]甘仲民,张更新,王华力等.毫米波通信技术与系统.北京：电子工业出版社,1989,22-54
[20]Wake D, Beacham K. Radio over fiber networks for mobile communications. In: Microwave and Terahertz Photonics. France,2004, vol.5466:157-160
[21]Lu J, Dong Z, Chen L, et al. High-repetitive frequency millimeter-wave signal generation using multi-cascaded external modulators based on carrier suppression technique. Optics Communications,2008,281(19):4889-4892
[22]Ma J, Xin X, Yu C. Millimeter-wave optical subcarrier generation by using an external modulator and optical carrier suppression. In:ICTON'07.9th Inter-national Conference on Transparent optical networks,2007, vol.3:273-276
[23]Chen L, Lei X, Wen S. A novel radio over fiber system with DWDM mm-wave generation and wavelength reuse for upstream data connection. Optics Express, 2007,15(9):5893-5897
[24]Chen L, Pi Y, Wen H, et al. All-Optical mm-wave generation by using direct-modulation FBD laser and external modulation. Microwave and Optical Technology Letters,2006,49(6):1265-1267
[25]Jia Z, Yu J, David B, et al. Bidirectional ROF links using optically up-converted DPSK for downstream and remodulated OOK for upstream. IEEE Photon Technology Letters,2007,19(9):653-655
[26]Murakoshi A, Tsukamoto K, Komaki S. High-performance RF signals transmission in SCM/WDMA radio-on-fiber bus link using optical FM method in presence of optical beat interference. IEEE Transmission Microwave Theory Technology,2006,54(2):967-972
[27]Yu J, Akanbi O, Luo Y, et al. An Demonstration of a novel WDM passive optical network architecture with source-free optical network units. IEEE Photonics Technology Letters,2007,19(8):571-573
[28]Bakaul M, Nirmalathas A, Lim C, et al. Hybrid multiplexing of multiband optical access technologies towards an integrated DWDM network. IEEE Photonics Technology Letters,2006,18(21):2311-2313
[29]Kawanishi T, Sakamoto T, Izutsu M. All-optical modulation format conversion from Frequency-Shift-Keying to Phase-Shift-Keying by using optical Double-Sideband modulation technique. In:Conference on Lasers & Electro-Optics (CLEO), America,2005, vol.5:4122-4135
[30]Ma J, Yu J, Yu C. Influence of the modulation index of Mach-Zehnder modulator on RoF link with ASK millimeter-wave signal. Optics & Laser Technology,2006, 41(1):11-16
[31]Kurt T, Yongacoglu A, Chouinard Y. OFDM and externally modulated multi-mode fibers in radio over fiber systems. IEEE Transactions on Wireless Communications,2006,5(10):2669-2674
[32]Lin C, Lin Y, Chen J, et al. Generation of direct-detection optical OFDM signal for Radio-Over-Fiber link using frequency doubling scheme with carrier suppression. Optics Express,2008,16(9):6056-6063
[33]王延恒,王黎明.光纤通信系统与光纤网.第一版.天津：天津大学出版社,2007,1-3
[34]李蔷薇.移动通信技术.第一版.北京：北京邮电大学出版社,2006,9-14
[35]秦海璐.无线光纤系统中新型毫米波生成技术的研究：[上海大学硕士学位论文].上海：上海大学,2006,1-5
[36]Stephens W, Joseph T. System characteristics of direct modulated and externally Journal of modulated RF fiber-optic links. Light-wave Technology,1987,5(3): 380-387
[37]Lin C, Lin Y, Chen J, et al. Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression. Optics Express,2008,16(9):6056-6057
[38]Yao J, Maury G, Li Y, et al. All-optical subcarrier frequency conversion using an electrooptic optical phase modulator. IEEE Photonics Technology Letters,2005, 17(11):2427-2429
[39]廖丰卓,周涛,杨亚培.光生毫米波技术.光电子技术,2006,43(12)：53-55
[40]裴军,余重秀,马健新等.ROF系统中毫米波产生方法的研究.通信技术及应用,2007,12(9)：45-47
[41]杨湘云,胡薇薇,徐安士.毫米波ROF光通信系统中信号传输色散影响的研究.北京大学学报,2006,42(3)：401-405
[42]Govind P. Nonlinear Fiber Optics & Application of Nonlinear Fiber Optics.贾东方,余震虹,谈斌,胡智勇等译.第一版.北京：电子工业出版社,2002,7-12
[43]张宝富,刘忠英,万谦等.现代光纤通信与网络教程.第一版.北京：人民邮电出版社,2002,31-54
[44]Jon W. Mark, Weihua Zhuang.无线通信与网络.李锵,郭继昌等译.第二版.北京：电子工业出版社,2006,10-11
[45]郭梯云,邬国扬,李建东.移动通信.第三版.西安：西安电子科技大学出版社,2005,77-85
[46]Hui R, Zhu B, Huang R, et al. Subcarrier multiplexing for High-Speed optical transmission. Journal of Light-wave Technology,2002,20(3):417-427
[47]金旗,裴昌幸,张振生.OFDM技术的基本原理.通信技术,2002,6(2)：44-46
[48]严开恩,王陆唐,黄肇明.ROF中色散对OFDM信号传输性能影响的研究.光通信技术,2005,10(5)：22-24
[49]Louis L, Michael P. The principles of OFDM. www.rfdesign.com,2001-02-12
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