Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon free Alleviation of LED nonlinearity impact in visible light communication using companding and predistortion

In order to suppress the nonlinearity impact of light-emitting diodes (LEDs) on the performance of visible light communication (VLC), the combined method including companding and predistortion was proposed in this work. The modified companding and predistortion based on the LED characteristic analysis were used corresponding to the output current -input voltage (I-V) and light output-injected current (L-I) nonlinearity, respectively. Using the combined method, the performances of the DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) VLC system were analysed. It is demonstrated that the non-linear distortion of OFDM transmitted signal is alleviated, thus the received signal quality is increased. As a result, the bit error rate (BER) performance of VLC system is improved obviously by using the combined method of companding and predistortion. Furthermore, the applicability of this combined method is also verified by analysing the nonlinearity suppression of the VLC system using different LED. The results reveal that both the impact from LED's I-V and L-I nonlinearity can be alleviated using the proposed method combining from companding and predistortion for DCO-OFDM VLC system.

References

    1. 1)
      • 11. Bejan, Ș., Azou, S., Morel, P., et al: ‘A joint linearization/companding a pproach for improving a CO-OFDM transmitter’, IEEE Photonics Technol. Lett., 2015, 27, (20), pp. 21622165.
    2. 2)
      • 10. Mazahir, S., Sheikh, S.A.: ‘On companding schemes for PAPR reduction in OFDM systems employing higher order QAM’, IEEE Trans. Broadcast., 2016, 62, (3), pp. 716726.
    3. 3)
      • 8. Yu, Z., Baxley, R. J., Zhou, G.T.: ‘EVM and achievable data rate analysis of clipped OFDM signals in visible light communication’, EURASIP J. Wirel. Commun., 2012, 2012, (1), p. 321.
    4. 4)
      • 14. Rahmatallah, Y., Bouaynaya, N., Mohan, S.: ‘Bit-error-rate performance of companding transforms for OFDM’, IEEE Trans. Veh. Technol., 2013, 62, (8), pp. 41164120.
    5. 5)
      • 2. Grobe, L., Anagnostis, P., Jonas, H., et al: ‘High-speed visible light communication systems’, IEEE Commun. Mag., 2013, 51, (12), pp. 6066.
    6. 6)
      • 7. Neokosmidis, I., Kamalakis, T., Walewski, J.W., et al: ‘Impact of nonlinear LED transfer function on discrete multitone modulation: analytical approach’, J. Lightwave Technol., 2009, 27, (22), pp. 49704978.
    7. 7)
      • 15. Lim, D., No, J., Lim, C., et al: ‘A new SLM OFDM scheme with low complexity for PAPR reduction’, IEEE Signal Process. Lett., 2005, 12, (2), pp. 9396.
    8. 8)
      • 18. Lu, H., Yu, T., Jia, C., et al: ‘Performance improvement of VLC system by using GaN-based LEDs with strain relief layers’, IEEE Photonics Technol. Lett., 2016, 28, (9), pp. 10381041.
    9. 9)
      • 6. Elgala, H., Mesleh, R., Haas, H.: ‘A study of LED nonlinearity effects on optical wireless transmission using OFDM’. Proc. of Int. Conf. on Wireless and Optical Communications Networks, Cairo, Egypt, April 2009, pp. 15.
    10. 10)
      • 13. Hu, M., Li, Y., Wang, W., et al: ‘A piecewise linear companding transform for PAPR reduction of OFDM signals with companding distortion mitigation’, IEEE Trans. Broadcast, 2014, 60, (3), pp. 532539.
    11. 11)
      • 16. Breiling, H., Muller-Weinfurtner, S.H., Huber, J.B.: ‘SLM peak-power reduction without explicit side information’, IEEE Commun. Lett., 2001, 5, (6), pp. 239241.
    12. 12)
      • 17. Luo, R., Li, R., Dang, Y., et al: ‘Two improved SLM methods for PAPR and BER reduction in OFDM-ROF systems’, Opt. Fiber Technol., 2015, 21, (1), pp. 2633.
    13. 13)
      • 12. Bandara, K., Sewaiwar, A., Chung, Y. H.: ‘Efficient nonlinear companding scheme for substantial reduction in peak-to-average power ratio of OFDM’, J. Syst. Eng. Electron., 2015, 26, (5), pp. 924931.
    14. 14)
      • 20. Li, J., Huang, Z., Liu, X., et al: ‘Hybrid time-frequency domain equalization for LED nonlinearity mitigation in OFDM-based VLC systems’, Opt. Express, 2015, 23, (1), pp. 611619.
    15. 15)
      • 1. Jovicic, A., Li, J., Richardson, T.: ‘Visible light communication: opportunities, challenges and the path to market’, IEEE Commun. Mag., 2013, 51, (12), pp. 2632.
    16. 16)
      • 3. Komine, T., Nakagawa, M.: ‘Fundamental analysis for visible-light communication system using LED lights’, IEEE Trans. Consum. Electron., 2004, 50, (1), pp. 100107.
    17. 17)
      • 19. Stepniak, G., Siuzdak, J., Zwierko, P.: ‘Compensation of a VLC phosphorescent white LED nonlinearity by means of volterra DFE’, IEEE Photonics Technol. Lett., 2013, 25, (16), pp. 15971600.
    18. 18)
      • 5. Kim, M.H., Schubert, M.F., Dai, Q., et al: ‘Origin of efficiency droop in GaN-based light-emitting diodes’, Appl. Phys. Lett., 2007, 91, (18), p. 183507.
    19. 19)
      • 9. Yang, Y., Zeng, Z., Feng, S., et al: ‘A simple OFDM scheme for VLC systems based on μ-law mapping’, IEEE Photonics Technol. Lett., 2016, 28, (6), pp. 641644.
    20. 20)
      • 4. Piprek, J.: ‘Efficiency droop in nitride-based light-emitting diodes’, Phys. Status Solidi a, 2010, 207, (10), pp. 22172225.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-com.2018.5851
Loading

Related content

content/journals/10.1049/iet-com.2018.5851
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address