Email this article 
Open Access
Subscription or Fee Access
CAZAC-Clipping Technique for PAPR Reduction in Direct-Detection Optical OFDM System
Abstract
High Peak-to-Average-Power Ratio (PAPR) is one of the major shortcomings of Optical Orthogonal Frequency Division Multiplexing (O-OFDM). In this paper, a novel PAPR reduction technique has been proposed which is the combination of the Constant Amplitude Zero Autocorrelation (CAZAC) sequence followed by clipping technique. It provides advantage over CAZAC matrix transform as clipping the CAZAC matrix processed signal reduces the probability of peak values, thus further minimizing the PAPR. Simulation results show that implementation of proposed technique in direct detection optical OFDM (DDO-OFDM) system has reduced PAPR to a great extent. There is a slight change in BER performance while implementing the proposed technique compared to CAZAC matrix transform. However, by optimizing the clipping value, both PAPR and BER can be reduced significantly with low complexity and ease of implementation.
Keywords
References
William Shieh, and Ivan Djordjevic. "OFDM for optical communications". Academic Press, 2009.
Shieh W., Yi X., and Tang Y. “Transmission experiment of multi-gigabit coherent optical OFDM systems over 1000 km SSMF fibre”, Electron. Lett., vol. 43, no. 3, pp. 183–184, Feb. 2007.
Jianjun Yu; Ze Dong; Xin Xiao; Yan Xia; Sheping Shi.” Generation, transmission and coherent detection of 11.2 Tb/s (112×100Gb/s) single source optical OFDM superchannel”, in Optical Fiber Communication Conference and Exposition (OFC/NFOE), 2011.
A.J. Lowery. “Improving Sensitivity and Spectral Efficiency in Direct-Detection Optical OFDM Systems”, in Optical Fiber communication/National Fiber Optic Engineers Conference, pp. 1-3, 2008.
J. Armstrong, “OFDM for Optical Communications.” Journal of Lightwave Technology, 27(3), pp.189–204, 2009.
X.Liand, L.J.Cimini, “Effects of clipping and filtering on the performance of OFDM.” IEEE Communication Letters. vol.2, no. 5, pp. 131-133, May1998.
Lin CHEN, Yong FANG, “PAPR Reduction in Optical OFDM Systems Using Asymmetrically Clipping and Filtering Technique.” Journal of Computational Information Systems vol. 8, no.7, pp. 2733–2740, 2012.
T. Jiang and Y. Wu, "An Overview: Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals," in IEEE Transactions on Broadcasting, vol. 54, no. 2, pp. 257-268, June 2008.
A. Vallavaraj, B. G. Stewart, D. K. Harrison and F. G. McIntosh, "Reduction of peak to average power ration of OFDM signals using companding," The Ninth International Conference on Communications Systems, Singapore, China, pp. 160-164, ICCS 2004.
Yufeng Shao, Nan Chi, Jingyuan Fan, and Wuliang Fang, "Generation of 16-QAM-OFDM Signals using Selected Mapping Method and Its Application in Optical Millimeter-Wave Access System. " IEEE Photonics Technology Letters, Vol. 24, No. 15, August 1, 2012.
Wang, Jianping, Ying Guo, and Xianwei Zhou, "PTSclipping method to reduce the PAPR in ROF-OFDM system." IEEE Transactions on Consumer Electronics, pp. 356-359, 2009.
J.A. davis, J. Jedwab, “Peak to mean power control and error correction for OFDM transmission using Golay sequences and Reed-Muller codes.” Electronics Letters Vol. 33, No. 4, pp. 267-68, 1997.
D. G. An, S. B. Ryu and H. G. Ryu, "Performance improvement of OFDM system using CAZAC sequence and adaptive pre-distorter,". 9th International Symposium on Communications and Information Technology, ISCIT 2009, pp. 1102-1105, Icheon, 2009.
Z. Feng ,M. Tang, S. Fu , L. Deng , "Performance-Enhanced Direct Detection Optical OFDM Transmission With CAZAC Equalization," in IEEE Photonics Technology Letters, vol. 27, no. 14, pp. 1507-1510, July15, 15 2015.
H. Ochiai, H. Imai. “On the distribution of the peak-to-average power ratio in OFDM signals.” IEEE Trans. On Communication , Vol 49, no.2, pp. 282-289, Feb. 2001.
Refbacks
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.