Abstract
In this paper, a hybrid technique using a precoder and a µ law compander is proposed to alleviate light emitting diode (LED) nonlinearity as well as peak-to-average power ratio (PAPR) reduction in a VLC system. A µ law compander is used to compress the peak valued signal and enhances small amplitudes to lower the PAPR. The work attains optimal PAPR and improves bit error rate (BER) of the system at low signal to noise ratio values. The nonlinear characteristic of a LED used as the transmitter in a VLC system leads to damaging effects while using OFDM in an optical system. The combination scheme improves LED nonlinearity for low input back off (IBO) power. In the work, nonlinearity is characterized using error vector magnitude (EVM) in percentage. The proposed method shows a 5% EVM improvement for 0 dB IBO. The paper provides a choice for a trade-off among PAPR reduction, BER and reduced nonlinearity.
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References
Agarwal, D., Sharan, N., et al.: PAPR reduction using precoding and companding techniques for OFDM systems. In: Proceedings of the international conference on advances in computer engineering and applications (ICACEA), pp. 18–23 (2015)
Ali, N., Almahainy, R., et al.: Analysis of improved μ-law companding technique for OFDM systems. IEEE Trans. Consum. Electron. 63(2), 126–134 (2017)
Asatani, K., Kimura, T.: Linearization of LED nonlinearity by predistortion. IEEE J Solid State Circuits 25(2), 207–212 (1978)
Bandara, K., Niroopan, P., Chung, Y.: PAPR reduced OFDM visible light communication using exponential nonlinear companding. In: Proceedings of the IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) pp. 1–5 (2013)
Chi, N., Haas, H., Kavehrad, M., Little, T.D.C., Huang, H.: Visible light communications: demand factors, benefits and opportunities. IEEE Wirel. Commun. 22(2), 5–7 (2015)
Dardari, D., Tralli, V., Vaccari, A.: A theoretical characterization of nonlinear distortion effects in OFDM systems. IEEE Trans. Commun. 48(10), 1755–1764 (2000)
Doblado, J.G., Oria, A.C.O., et al.: Cubic metric reduction for DCO-OFDM visible light communication systems. J. Lightw. Technol. 33(10), 1971–1978 (2015)
Elgala, H., Mesleh, R., Haas, H.: A study of LED nonlinearity effects on optical wireless transmission using OFDM. In: Proceedings of the IFIP International Conference on Wireless and Optical Communications Networks, pp. 1–5 (2009)
Elgala, H., Mahesh, R.: Non linearity effect and predistortion in optical OFDM wireless transmission using LEDs. Int. J Ultra-Wideband Commun Syst 1(2), 143–150 (2009)
Fahamuel, P., Thompson, J., Haas, H.: Study, analysis and application of optical OFDM, single carrier (SC) and MIMO in intensity modulation direct detection (IM/DD). In: Proceedings of the IET Intelligent Signal Processing Conference (ISP), London, pp. 1–6 (2013)
Index, Visual Networking, Cisco. Global mobile data traffic forecast update, 2017–2022. Cisco white paper (2019)
Jiang, T., et al.: Investigation of DC-biased optical OFDM with precoding matrix for visible light communications: theory, simulations, and experiments. IEEE Photonics J. 10(5), 1–16 (2018)
Jovicic, A., Li, J., Richardson, T.: Visible light communication: opportunities, challenges and the path to market. IEEE Commun. Mag. 51(12), 26–32 (2013)
Kaur, N., Kansal, L.: Reducing the peak to average power ratio of OFDM signals through Walsh Hardmard transform. Global J Inc (USA) 13(1), 17–24 (2013)
Sanya, M.F., Djogbe, L., Vianou, A., Aupetit-Berthelemot, C.: DC-biased optical OFDM for IM/DD passive optical network systems. IEEE/OSA J. Opt. Commun. Netw. 7(4), 205–214 (2015)
Sharan, N., et al.: Peak-to-average power ratio (PAPR) reduction using combination of precoding and companding techniques for VLC OFDM systems. In: Proceedings of the international conference on microwave integrated circuits, photonics and wireless networks (IMICPW), pp. 149–153 (2019)
Slimane, S.B.: Reducing the peak-to-average power ratio of OFDM signals through precoding. IEEE Trans. Veh. Technol. 56(2), 686–695 (2007)
Wang, X., Tjhung, T.T., et al.: Reduction of peak-to-average power ratio of OFDM system using: a companding technique. IEEE Trans. Broadcast. 45(4), 420–422 (1999)
Xiadong, L., Cimini, L.J.: Effects of clipping and filtering on the performance of OFDM. In: Proceedings of the IEEE Vehicular Technology Conference. Technology in Motion, Phoenix, AZ, USA. vol 3, pp. 1634–1638 (1997)
Yu, B., Zhang, H., Wei, L., Song, J.: Subcarrier grouping OFDM for visible-light communication systems. IEEE Photonics J. 7(5), 1–12 (2015)
Zhang, H., Yuan, Y., Xu, W.: PAPR reduction for DCO-OFDM visible light communications via semidefinite relaxation. IEEE Photonics Technol. Lett. 26(17), 1718–1721 (2014)
Zhou, J., Qiao, Y., Cai, Z., Ji, Y.: Asymmetrically clipped optical fast OFDM based on discrete cosine transform for IM/DD systems. IEE J. Lightw. Technol. 33(9), 1920–1927 (2015)
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Sharan, N., Ghorai, S.K. PAPR reduction and non-linearity alleviation using hybrid of precoding and companding in a visible light communication (VLC) system. Opt Quant Electron 52, 304 (2020). https://doi.org/10.1007/s11082-020-02426-1
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DOI: https://doi.org/10.1007/s11082-020-02426-1