Abstract
In this paper, a novel optical orthogonal frequency division multiplexing (O-OFDM) scheme based on real-imaginary coefficients separation is proposed for visible light communications (VLCs) to mitigate nonlinear distortion of light-emitting diodes (LEDs). In the proposed scheme, the transmitted signal in the frequency domain does not need to be Hermitian symmetric, and real and imaginary parts are separated. Signals are introduced to keep the clipped information due to the high peak to average power ratio of OFDM, and a procedure to recover the clipped information is proposed. The transmit strategy and receive algorithm of the proposed scheme are presented in detail. Simulation results show that compared with traditional O-OFDM schemes, the proposed scheme can achieve better bit error rate performance under LED nonlinear constraints and reduce the requirement for the linear dynamic range of LEDs.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Komine, T., Nakagawa, M.: Fundamental analysis for visible-light communication system using LED lights. IEEE Trans. Consum. Electron. 50(1), 100–107 (2004)
Elgala, H., Mesleh, R., Haas, H.: Indoor optical wireless communication: potential and state-of-art. IEEE Commun. Mag. 49(9), 56–62 (2011)
Wu, L., Zhang, Z., Liu, H.: Modulation scheme based on precoder matrix for MIMO optical wireless communication systems. IEEE Commun. Lett. 16(9), 1516–1519 (2012)
Carruthers, J., Kahn, J.: Multiple-subcarrier modulation for nondirected wireless infrared communication. IEEE J. Sel. Areas Commun. 14(3), 538–546 (1996)
Armstrong, J., Lowery, A.J.: Power efficient optical OFDM. Electron. Lett. 42(6), 370–372 (2006)
Tsonev, D., Sinanovic, S., Haas, H.: Novel unipolar orthogonal frequency division multiplexing (U-OFDM) for optical wireless. In: Proceedings of the IEEE 75th Vehicular Technology Conference, p. 15, May 2012
Fernando, N., Hong, Y., Viterbo, E.: Flip-OFDM for optical wireless communications. In: Proceedings of the IEEE Information Theory Workshop, p. 59, October 2011
Wu, L., Zhang, Z., Liu, H.: Coefficients separation MIMO-OFDM optical wireless communication system in diffuse fading channels. In: Proceedings of the IEEE ICC 2015, London, UK, pp. 5132–5137, June 2015
Elgala, H., Mesleh, R., Haas, H.: A study of LED nonlinearity effects on optical wireless transmission using OFDM. In: Proceedings of the WOCN, p. 15, April 2009
Dimitrov, S., Haas, H.: Information rate of OFDM-based optical wireless communication systems with nonlinear distortion. J. Lightwave Technol. 31(6), 918–929 (2013)
Xu, W., Wu, M., Zhang, H.: ACO-OFDM-specified recoverable upper clipping with efficient detection for optical wireless communications. IEEE. Photon. 6(5), 1–17 (2014)
Elgala, H., Little, T.D.C.: Polar-based OFDM and SC-FDE links toward energy-efficient Gbps transmission under IM-DD optical system constraints. IEEE/OSA J. Opt. Commun. Netw. 7(2), A277–284 (2015)
Zhang, H., Yuan, Y., Xu, W.: PAPR reduction for DCO-OFDM visible light communications via semidefinite relaxation. IEEE Photon. Technol. Lett. 26(17), 1718–1721 (2014)
Armstrong, J., Schmidt, B.J.C.: Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN. IEEE Commun. Lett. 12, 343–345 (2008)
Yang, Y., Zeng, Z., Feng, S.: A simple OFDM scheme for VLC systems based on \(\mu \)-law mapping. IEEE Photon. Technol. Lett. 28(6), 641–644 (2016)
Acknowledgments
This work is supported by NSFC projects (61501109, 61571105, and 61223001), 863 project (No. 2013AA013601), and Jiangsu NSF project (No. BK20140646).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
About this paper
Cite this paper
Kong, L. et al. (2018). A Novel OFDM Scheme for VLC Systems Under LED Nonlinear Constraints. In: Chen, Q., Meng, W., Zhao, L. (eds) Communications and Networking. ChinaCom 2016. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 209. Springer, Cham. https://doi.org/10.1007/978-3-319-66625-9_38
Download citation
DOI: https://doi.org/10.1007/978-3-319-66625-9_38
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-66624-2
Online ISBN: 978-3-319-66625-9
eBook Packages: Computer ScienceComputer Science (R0)