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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Jarajreh, Mutsam Abdel-karim
Languages: English
Types: Doctoral thesis
Subjects: H600
In order to satisfy the ever increasing demand for the bandwidth requirement in broadband services the optical orthogonal frequency division multiplexing (OOFDM) scheme is being considered as a promising technique for future high-capacity optical networks. The aim of this thesis is to investigate, theoretically, the feasibility of implementing the coherent optical OFDM (CO-OOFDM) technique in long haul transmission networks. For CO-OOFDM and Fast-OFDM systems a set of modulation formats dependent analogue to digital converter (ADC) clipping ratio and the quantization bit have been identified, moreover, CO-OOFDM is more resilient to the chromatic dispersion (CD) when compared to the bandwidth efficient Fast-OFDM scheme. For CO-OOFDM systems numerical simulations are undertaken to investigate the effect of the number of sub-carriers, the cyclic prefix (CP), and ADC associated parameters such as the sampling speed, the clipping ratio, and the quantisation bit on the system performance over single mode fibre (SMF) links for data rates up to 80 Gb/s. The use of a large number of sub-carriers is more effective in combating the fibre CD compared to employing a long CP. Moreover, in the presence of fibre non-linearities identifying the optimum number of sub-carriers is a crucial factor in determining the modem performance. For a range of signal data rates up to 40 Gb/s, a set of data rate and transmission distance-dependent optimum ADC parameters are identified in this work. These parameters give rise to a negligible clipping and quantisation noise, moreover, ADC sampling speed can increase the dispersion tolerance while transmitting over SMF links. In addition, simulation results show that the use of adaptive modulation schemes improves the spectrum usage efficiency, thus resulting in higher tolerance to the CD when compared to the case where identical modulation formats are adopted across all sub-carriers. For a given transmission distance utilizing an artificial neural networks (ANN) equalizer improves the system bit error rate (BER) performance by a factor of 50% and 70%, respectively when considering SMF firstly CD and secondly nonlinear effects with CD. Moreover, for a fixed BER of 10-3 utilizing ANN increases the transmission distance by 1.87 times and 2 times, respectively while considering SMF CD and nonlinear effects. The proposed ANN equalizer performs more efficiently in combating SMF non-linearities than the previously published Kerr nonlinearity electrical compensation technique by a factor of 7.
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    • [1] [2] [3] [4] [5] [6] P. M. Watts, R. Waegemans, M. Glick, P. Bayvel, and R. I. Killey, "An FPGA-based optical transmitter using real-time DSP for implementation of advanced signal formats and signal predisortion," in The European Conference on Optical Communications, ECOC, pp. 1-2, 2006.
    • M. Franceschini, G. Bongiorni, G. Ferrari, R. Raheli, F. Meli, and A. Castoldi, "Fundamental limits of electronic signal processing in direct-detection optical communications," Journal of Lightwave Technology, vol. 25, pp. 1742-1753, 2007.
    • L. Hanzo, S. X. Ng, T. Keller, and W. Webb, "Quadrature amplitude modulation:From basics to adaptive trellis-coded, turbo-equalised and space-time coded OFDM, CDMA and MGCDMA systems": Wiley, 2004.
    • Indianapolis: IN: Sams, 2002.
    • N. E. Jolley, H. Kee, R. Rickard., J. M. Tang, and K. Cordina, "High-speed transmission of adaptively modulated optical OFDM signals over multimode fibers using directly modulated DFBs," Presented at the Optical Fiber Communication Conference, and the National Fiber Optic Engineers Conference. OFC, Anahiem, CA, 2005.
    • X. Q. Jin, J. M. Tang, P. S. Spencer, and K. A. Shore, "Optimization of adaptively modulated optical OFDM modems for multimode fiber-based local area networks," Journal of Optical Networking, vol. 7, pp. 198-214, Feb 2008.
    • [8] [9] [10] [11] [12] [13] W. Shieh, H. Bao, and Y. Tang, "Coherent optical OFDM: theory and design," Optics Express, vol. 16, pp. 841-859, 2008.
    • A. J. Lowery, "Fibre nonlinearity pre- and post compensation for long-haul optical links using OFDM," Optics Express, vol. 15, pp. 12965-12970, 2007.
    • J. A. L. Silva, A. V. T. Cartaxo, and M. E. V. Segatto, "A PAPR reduction technique based on a constant envelope OFDM approach for fiber nonlinearity mitigation in optical direct-detection systems," Journal of Optical Communications and Networking, IEEE/OSA, vol. 4, pp. 296-303, 2012.
    • [16] [17] [18] [19] [20] H. Sun, K.-T. Wu, and K. Roberts, "Real-time measurements of a 40 Gb/s coherent System," Optics Express, vol. 16, pp. 873-879, 2008.
    • Y. Xingwen, W. Shieh, and T. Yan, "Phase estimation for coherent optical OFDM," Photonics Technology Letters, IEEE, vol. 19, pp. 919-921, 2007.
    • http://www.alcatcl-lucent.com, accessed at 12-Dec-2009.
    • 28, pp. 2054-2061, 2010.
    • M. Yiran, Y. Qi, T. Yan, C. Simin, and W. Shieh, "1-Tb/s per channel coherent optical OFDM transmission with subwavelength bandwidth access," Presented at the Optical Fiber Communication. OFC, pp. 1-3, 2009.
    • W. Shieh, Q. Yang, and Y. Ma, "107 Gb/s coherent optical OFDM transmission over 1000-km SSMF fiber using orthogonal band multiplexing," Optics Express, vol. 16, pp. 6378-6386, 2008.
    • Moller, M. Huebner, J. Becker, C. Koos, W. Freude, and J. Leuthold, "Single source optical OFDM transmitter and optical FFT receiver demonstrated at line rates of 5.4 and 10.8 Tbit/s," presented at the Optical Fiber Communication, collocated National Fiber Optic Engineers Conference.OFC, pp. 1-3, 2010.
    • [22] [23] [24] [25] [26] [27] A. J. Lowery, D. Liang Bangyuan, and J. Armstrong, "Performance of optical OFDM in ultralong-haul WDM lightwave systems," Journal of Lightwave Technology, vol.
    • 25, pp. 131-138, 2007.
    • M. Cavallari, C. R. S. Fludger, and P. J. Anslow, "Electronic signal processing for differential phase modulation formats," Presented at the Optical Fiber Communication Conference. OFC, pp. 422-425 , 2004.
    • [29] [30] [31] [32] [33] [34] [36] [37] [38] [39] [40] [41] [42] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [59] [60] [61] [62] [63] [64] [65] [77] [78] [79] [80] [81] [82] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95] [96] [97] [98] [108] S. C. B. Lo, J. S. J. Lin, M. T. Freedman, and S. K. Mun, "Application of artificial neural networks to medical image pattern recognition: detection of clustered microcalcifications on mammograms and lung cancer on chest radiographs " Journal of VLSI Signal Processing, vol. 18, pp. 263-274, 1998.
    • [145] L. Hanzo, C. H. Wong, and M. S. Yee, "Neural networked based equalization, adaptive wireless transceivers," Wiley, IEEE Press, pp. 299-383, 2002.
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