光学学报, 2009, 29 (2): 323, 网络出版: 2009-02-23   

自适应调制光正交频分复用系统的可变长保护间隔研究

Adaptively Modulated Optical Orthogonal Frequency Division Multiplexing System with Variable Guard Interval
作者单位
电子科技大学宽带光纤传输与通信网技术教育部重点实验室, 四川 成都 610054
摘要
利用保护间隔消除由色散引起的符号间干扰(ISI)对于光正交频分复用(OOFMD)系统是必不可少的。延时在不同的传输距离和传输环境下是不同的,采用固定保护长度的方式会硬响系统的功率和频谱利用率。提出了一种先进的自适应循环前缀(ACP)方法。对于多模光纤信道,循环前缀可以根据差分模延时(DMD)与传输距离确定其取值下限来消除ISI的影响。仿真实验验证,采取合适的保护间隔,在多模光纤传输10 Gb/s达1 km时,可达到与采用定长循环前缀时相同的传输性能。
Abstract
It is indispensable to make use of guard interval to overcome intersymbol interference (ISI) caused by chromatic dispersion for optical orthogonal frequency division multiplexing (OOFMD) . However, the channel delay is not constant in different transmission distances and conditions, fixed guard interval decreases the power and spectrum availabity considerably. A novel adaptive cyclic prefix (ACP) OFDM concept is proposed. The lower limit value of CP, which can be determined by differential mode delay (DMD) and transmission distance, can eliminate influence of ISI. Simulation results demonstrate that the system can transmit a data rate 10 Gb/s about 1 km with reasonable CP without sacrificing the BER performance compared with the conventional non-adaptive CP.
参考文献

[1] 王文博,郑侃.宽带无线通信OFDM技术[M].北京:人民邮电出版社,2003,12~17

    Wang Wenbo, Zheng Kan. Broad Band Wireless Communication OFDM Technology[M]. Beijing:Posts & Telecom Press,2003,12~17

[2] N. E. Jolley, H. Kee, R. Rickard et al.. Generation and propagation of a 1550 nm 10 Gbit/s optical orthogonal frequency division multiplexed signal over 1000m of multimode fibre using a directly modulated DFB. Optical Fibre Communication Conf./National Fibre Optic Engineers Conf.(OFC/NFOEC),Anaheim,CA, 2005,Paper OFP3

[3] . M. Tang, P. M. Lane, K. A. Shore. Transmission performance of adaptively modulated optical OFDM signals in multimode fibre links[J]. IEEE Photon. Technol. Lett., 2006, 18(1): 205-207.

[4] 李岩,徐天华,贾大功 等. 一种40 Gb/s单信道光纤通信系统中的动态色散补偿[J]. 光学学报, 2007, 27(7): 1161~1165

    Li Yan, Xu Tianhua, Jia Dagong et al.. Dynamic dispersion compensation in a 40 Gb/s single-channeled optical fiber communication system[J]. Acta Optica Sinica, 2007, 27(7): 1161~1165

[5] . . An adaptive OFDM system with variable guard interval[J]. Proc. SPIE, 2004, 5284: 243-252.

[6] 李兆玺,胡贵军,孔令杰.自适应调制的正交频分复用多模光纤通信系统性能分析[J]. 中国激光,2008,35(4):582~586

    Li Zhaoxi,Hu Guijun,Kong Lingjie. Performance analysis of a multimode fiber communication system based on the adaptive modulation orthogonal frequency division multiplexing[J]. Chinese J. Lasers,2008, 35(4):582~586

[7] . M.Tang, P.M.Lane, K.A.Shore. High speed transmission of adaptively modulated optical OFDM signals over multimode fibers using directly modulated DFBs[J]. J. Lightw. Technol., 2006, 24(1): 429-441.

[8] . M. Tang, K. A. Shore. 30Gb/s signal transmission over 40 km directly modulated DFB-laser-based single-mode-fiber links without optical amplification and dispersion compensation[J]. J. Lightw. Technol., 2006, 24(6): 2318-2327.

[9] . Q. Jin, J. M. Tang, P. S. Spencer et al.. Optimization of adaptively modulated optical OFDM modems for multimode fiber-based local area networks[J]. Journal of Optical Networking, 2008, 7(3): 198-214.

[10] . L. Seoane, S. K. Wilson, S. Gelfand. Analysis of intertone and interblock interference in OFDM when the length of the cyclic prefix is shorter than the length of the impulse response of the channel[J]. IEEE Comm., 1997, 1(1): 32-36.

[11] . E. A. Whiteaway, G. H. B. Thompson, A. J. Collar et al..The design and assessment of λ/4 phase-shifted DFB laser structures[J]. IEEE J. Quant. Electron., 1989, 25(6): 1261-1279.

[12] . Pepeljugoski, S. E. Golowich, A. J. Ritger et al..Modelling and simulation of next-generation multimode fiber links[J]. J. Lightwave. Technol., 2003, 21(5): 1242-1255.

张静, 邱昆, 李永刚, 周宇, 张洪波. 自适应调制光正交频分复用系统的可变长保护间隔研究[J]. 光学学报, 2009, 29(2): 323. Zhang Jing, Qiu Kun, Li Yonggang, Zhou Yu, Zhang Hongbo. Adaptively Modulated Optical Orthogonal Frequency Division Multiplexing System with Variable Guard Interval[J]. Acta Optica Sinica, 2009, 29(2): 323.

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