DFT-spread combined with clipping method to reduce the PAPR in VLC-OFDM system

Abstract

Orthogonal frequency division multiplexing (OFDM) is an attractive technique to realize high data rate in light emitting diodes (LEDs)-based visible light communication (VLC). However, high peak-to-average power ratio (PAPR) of OFDM makes VLC-OFDM very sensitive to the nonlinearity of LEDs. In this paper, the discrete Fourier transform-spread (DFT-spread) combined with clipping method is proposed to reduce the PAPR of OFDM signal in VLC system. Combining simulation with experiment, a performance comparison is made among conventional OFDM, DFT-spread-OFDM, and clipped DFT-spread-OFDM with different clipping ratios (CRs) in a single LED-based VLC system. The experimental results show that the proposed clipped DFT-spread-OFDM method can effectively improve the system performance compared with the other two methods. At the optimum signal peak-to-peak (PTP) value, by using the clipped DFT-spread-OFDM scheme with CR at 8 dB, the bit error rate (BER) of the system can be reduced from 0.003 7 to 0.000 287.1

References

[1] Cheng-Chun C., Yuan-Jun S., Chien-Ta W., Kurokawa U., Byung C.. A Sensor Array Approach for Robust Wavelength Division Multiplexing in VLC Systems. 7th IEEE Conference on Industrial Electronics and Applications. 20121827

[2] Komine T., Nakagawa M.. IEEE Transactions on Consumer Electronics. 2004, 50: 100

[3] O’Brien D., Zeng L., Hoa L.-M., Faulkner G., Walewski J. W., Randel S.. Visible Light Communications: Challenges and Possibilities. IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications. 20081

[4] Vucic J., Kottke C., Nerreter S., Langer K. D., Walewski J. W.. Journal of Lightwave Technology. 2010, 28: 3512

[5] Vucic J., Kottke C., Habel K., Langer K. D.. 803 Mbit/s Visible Light WDM Link based on DMT Modulation of a Single RGB LED Luminary, Optical Fiber Communication Conference and Exposition. 20111

[6] Tsonev D., Hyunchae C., Rajbhandari S., McKendry J. J. D., Videv S., Gu E.. IEEE Photonics Technology Letters. 2014, 26: 637

[7] Zhenhua Y., Baxley R. J., Zhou G. T.. Distributions of Upper PAPR and Lower PAPR of OFDM Signals in Visible Light Communications. IEEE International Conference on Acoustics, Speech and Signal Processing. 2014355

[8] Zhenhua Y., Baxley R. J., Zhou G. T.. Iterative Clipping for PAPR Reduction in Visible Light OFDM Communications. IEEE Military Communications Conference. 20141681

[9] Jianping W., Ying G., Xianwei Z.. IEEE Transactions on Consumer Electronics. 2009, 55: 356

[10] Bauml R. W., Fischer R. F. H., Huber J. B.. Electronics Letters. 1996, 32: 2056

[11] Cimini L. J., Sollenberger N. R.. IEEE Communications Letters. 2000, 4: 86

[12] Yan T., Shieh W., Krongold B. S.. IEEE Photonics Technology Letters. 2010, 22: 1250

[13] More A. P., Somani S. B.. The Reduction of PAPR in OFDM Systems Using Clipping and SLM Method. International Conference on Information Communication and Embedded Systems. 2013593

[14] Nisar M. D., Nottensteiner H., Hindelang T.. On Performance Limits of DFT Spread OFDM Systems. Mobile and Wireless Communications Summit. 20071

[15] Astély D., Dahlman E., Furuskär A., Jading Y., Lindström M., Parkval S.. IEEE Communications Magazine. 2009, 47: 44

[16] Liu X., Buchali F.. Opt. Express. 2008, 16: 21944

[17] Rui D., Jing H., Ming C., Yi L., Lin C.. IEEE Photonics Technology Letters. 2015, 27: 1841

[18] Fan L., Xinying L., Lin C., Xia Y., Ge C., Chen Y.. IEEE Photonics Technology Letters. 2014, 26: 941