S pecial Topic Flipped-Exponential Nyquist Pulse Technique to Optimize PAPR in Optical Direct-Detection OFDM Systems Jiangnan Xiao, Zizheng Cao, Fan Li, Jin Tang, and Lin Chen
National“863”High Tech Research and Development Program of china (Grant No. 2009AA01Z220, 2009AA01Z222), Program for Hunan Provincial Science and technology. References
[1] Lowery, A.J, Liang Bangyuan Du, Armstrong, J., "Performance of Optical OFDM in Ultralong-Haul WDM Lightwave Systems," Journal of Lightwave Technology, vol.25, no.1, pp.131-138, Jan. 2007. [2] W. Shieh, X. Yi, Y. Ma, and Y. Tang, "Theoretical and experimental study on PMD-supported transmission using polarization diversity in coherent optical OFDM systems," Opt. Express (15), 9936-9947 (2007). [3] Yiran Ma, Qi Yang, Yan Tang, Simin Chen, Shieh, W, "1-Tb/s Single-Channel Coherent Optical OFDM Transmission With Orthogonal-Band Multiplexing and Subwavelength Bandwidth Access," Journal of Lightwave Technology , vol.28, no.4, pp.308-315, Feb.15, 2010. [4] Armstrong, J., "OFDM for Optical Communications," Journal of Lightwave Technology, vol.27, no.3, pp.189-204, Feb.1, 2009. [5] Shieh, W., "PMD-Supported Coherent Optical OFDM Systems," IEEE Photonics Technology Letters, vol.19, no.3, pp.134-136, Feb.1, 2007. [6] W. Shieh, H. Bao, and Y. Tang, "Coherent optical OFDM: theory and design," Opt. Express (16), 841-859 (2008). [7] Takahashi, H., "Coherent OFDM transmission with high spectral efficiency," Optical Communication, 2009. ECOC '09. 35th European Conference on, pp.1-4, Sept. 2009. [8] Schuster, M. Randel, S. Bunge, C.A.; Lee, S.C.J. Breyer, F. Spinnler, B. Petermann, K., "Spectrally Efficient Compatible Single-Sideband Modulation for OFDM Transmission with Direct Detection," IEEE Photonics Technology Letters, vol.20, no.9, pp.670-672, May1, 2008. [9] Schmidt, B.Lowery, A.J.Armstrong, J., "Impact of PMD in Single-Receiver and Polarization-Diverse Direct-Detection Optical OFDM," Journal of Lightwave Technology, vol.27, no.14, pp.2792-2799, July15, 2009. [10] Schmidt, B.J.C., Lowery, A.J.; Armstrong, J., "Experimental Demonstrations of Electronic Dispersion Compensation for Long-Haul Transmission Using Direct-Detection Optical OFDM," Journal of Lightwave Technology, vol.26, no.1, pp.196-203, Jan.1, 2008. [11] Armstrong J., "Peak-to-average power reduction for OFDM by repeated clipping and frequency domain filtering," Electronics Letters , vol.38, no.5, pp.246-247, 28 Feb 2002. [12] Wonjeong Jeong, Hyuncheol Park; Hyuckjae Lee, Sunghyun Hwang, "Performance improvement techniques for CCK-OFDM WLAN modem," IEEE Transactions on Consumer Electronics, vol.49, no.3, pp. 602- 605, Aug. 2003. [13]. Jianjun Yu, Ze Dong, Hung-Chang Chien, Zhensheng Jia, Di Huo, Hong Yi, Meng Li,Zhiliang Ren, Nan Lu, Li Xie, Kai Liu, Xiaochao Zhang, Yan Xia,Yao Cai, Gunkel, M,Wagner, P., Mayer, H.; Schippel, A., "Field trial Nyquist-WDM transmission of 8×216.4Gb/s PDM-CSRZ-QPSK exceeding 4b/s/Hz spectral efficiency," Optical Fiber Communication Conference and Exposition (OFC/ NFOEC), 2012 and the National Fiber Optic Engineers Conference , pp.1-3, 4-8 March 2012. [14] Zhou, X. Nelson, L. E. Isaac, R. Magill, P. D. Zhu, B.; Peckham, D. W. Borel, P. Carlson, K. "4000 km transmission of 50GHz spaced, 10×494.85-Gb/s hybrid
32-64QAM using cascaded equalization and training-assisted phase recovery," Optical Fiber Communication Conference and Exposition (OFC/NFOEC), 2012 and the National Fiber Optic Engineers Conference , pp.1-3, 4-8 March 2012. [15] Cai, J.-X. Cai, Y. Sun, Y. Davidson, C.R., Foursa, D.G. Lucero, A.; Sinkin, O. Patterson, W. Pilipetskii, A. Mohs, G. Bergano, N.S., "112×112 Gb/s transmission over 9,360 km with channel spacing set to the baud rate (360% spectral efficiency)," Optical Communication (ECOC), 2010 36th European Conference and Exhibition on , pp.1-3, 19-23 Sept. 2010. [16] SB Slimane,”Peak-to-average power ratio reduction of OFDM signals using broadband pulse shaping,”Proc. IEEE VTC '02, pp. 889-893, Sep. 2002. [17] Beaulieu, N.C.,Tan, C.C., Damen, M.O., "A "better than" Nyquist pulse," IEEE Communications Letters, vol.5, no.9, pp.367-368, Sept. 2001. [18] Assalini, A.; Tonello, A.M. , "Improved Nyquist pulses," IEEE Communications Letters, vol.8, no.2, pp. 87- 89, Feb. 2004. Manuscript received: December 15, 2011
B
iographies
Jiangnan Xiao (xjn2302@163.com) is pursuing his PhD degree at Hunan University, Changsha, China. His research interests include impairment compensation of orthogonal frequency-division multiplexing (OFDM) radio-over-fiber system, signal processing—including synchronization, equalization coding—in coherent OFDM systems, and PDM.
Zizheng Cao (oiganngeo@163.com) received his ME degree in information
and communication engineering from Hunan University, Changsha, China, in 2010. He is currently pursuing his PhD degree at Hunan University. His research interests include impairment compensation of orthogonal frequency-division multiplexing (OFDM) radio-over-fiber systems, and high-spectra efficiency direct-detection OFDM transmission systems.
Fan Li (fanli0809@sina.com) is pursuing his PhD degree at Hunan University, Changsha, China. His research interests include optical orthogonal frequency-division multiplexing (OFDM) transmission, and impairment compensation in OFDM radio-over-fiber systems.
Jin Tang (gltangjin@hotmail.com) is pursuing his PhD degree at Hunan
University, Changsha, China. His research interests include optical orthogonal frequency-division multiplexing (OFDM) transmission, signal processing in coherent OFDM systems, and coherent optical communication systems.
Lin Chen (liliuchen12@126.com) received his PhD degree in optical
communications from Beijing University of Posts and Telecommunications in June 2004. He is currently a professor at Hunan University, Changsha, China. He has authored or coauthored more than 40 journal papers. His research interests include polarization-mode dispersion compensation, new modulation format techniques, radio over fiber, and coherent optical communication systems.
Roundup
ZTE Partners with KPN Group Belgium to Deploy Packet-Switched Core Network 27 August 2012—ZTE Corporation has signed a deal on a packet-switched core network (CN) for KPN Group Belgium (KPNGB). KPNGB will deploy ZTE’ s packet-switched CN equipment, which supports unified radio access. The contract is the second of its kind between ZTE and KPNfollows from a construction project with KPN Germany (E-Plus) that was completed in September 2010. ZTE’ s Uni-Core solution allows seamless evolution from 2G/3G packet core to evolved packet core (EPC) and assists operators support unified 2G, 3G and 4G access. ZTE helps operators build a smart pipe that supports service differentiation and traffic distribution and enables a flexible policy mechanism. This will help KPNGB deliver differentiated services and enhance its service innovation capability and competitive edge. As of Q1 2012, ZTE has secured more than 20 EPC commercial contracts, deployed more than 80 trial networks globally, and has cooperation with mainstream operators. (ZTE Corporation)
September 2012 Vol.10 No.3
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