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Chin. Opt. Lett.
 Home  List of Issues    Issue 09 , Vol. 08 , 2010    10.3788/COL20100809.0875


Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens
Jing Shao, Wei Li, Xiaojun Liang
Wuhan National Lab for Optoelectronics, [Huazhong University of Science and Technology], Wuhan 430074, China

Chin. Opt. Lett., 2010, 08(09): pp.875-880-6

DOI:10.3788/COL20100809.0875
Topic:Fiber optics and optical communications
Keywords(OCIS Code): 060.4230  060.4510  190.4370  

Abstract
Phase pre-emphasis is theoretically studied and introduced to reduce peak-to-average power ratio (PAPR) in optical orthogonal frequency division multiplexing (OFDM) systems. In intensity modulated (IM) systems, simulations show noticeable PAPR reductions: 4.14 dB (N = 16) and 15.48 dB (N = 512) in time lens-based OFDM, N is the number of subcarriers. An equation is developed to calculate phase values and is proved to be effective. Optical implementing methods are proposed and analyzed. In a time lens-based OFDM system, phase pre-emphasis reduces fiber nonlinearity and results in a 5.2-dB increase of launch power at the bit error rate (BER) of 10?6. Simulations also show similar PAPR reduction and fiber nonlinearity mitigation in optical inverse discrete Fourier transformer (OIDFT) based OFDM systems.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2010/5/10
Accepted:1949/10/1
Posted online:1949/10/1

Get Citation: Jing Shao, Wei Li, Xiaojun Liang, "Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens," Chin. Opt. Lett. 08(09), 875-880-6(2010)

Note: This work was supported by the National "973" the Program of China (Nos. 2010CB328300 and 2010CB328305), the National Natural Science Foundation of China (No. 60772013), and the National "863" program of China (No. 2009AA03Z408). The authors would like to thank Shaohua Yu at Research Institute of MPT and Weidong Ma at Accelink Technologies Co., Ltd. for their informative discussion and valuable suggestions.



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