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Telecommunications and Radio Engineering

年間 12 号発行

ISSN 印刷: 0040-2508

ISSN オンライン: 1943-6009

SJR: 0.185 SNIP: 0.268 CiteScore™:: 1.5 H-Index: 22

Indexed in

OFFSET MODULATION FOR VISIBLE LIGHT COMMUNICATION SYSTEMS

巻 78, 発行 13, 2019, pp. 1213-1222
DOI: 10.1615/TelecomRadEng.v78.i13.70
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要約

In this paper we discuss a new transmission approach for orthogonal frequency division multiplexing (OFDM) in visible light communication (VLC) systems. Unlike existing approaches of OFDM-based VLC systems, the real signal is obtained by utilizing offset modulation (OM) in OFDM-based VLC that can efficiently utilize the available bandwidth without the need of Hermitian symmetry. In the proposed OM-OFDM based VLC scheme, the complex OFDM signals are phased mapped into real values and hence a good bit error rate (BER) performance is achieved compared to conventional approaches. Since no Hermitian symmetry is required in the proposed scheme, simulation results demonstrate that our approach yields 50% improvement in spectral efficiency compared to existing approaches with the same modulation order. Furthermore, the proposed scheme also achieves a considerable reduction in peak-to-average power ratio (PAPR), which is the major drawback of optical OFDM systems.

参考
  1. Saini, H., (2016) Li-Fi (Light Fidelity)-the future technology in wireless communication, Journal of Computer Applications, 7(1), pp.13-15.

  2. Armstrong, J., (2009) OFDM for optical communications, Journal of Lightwave Technology, 27(3), pp. 189-204.

  3. Jiang, R., Wang, Q., Wang, F., Dai, L., and Wang, Z., (2015) An optimal scaling scheme for DCO- OFDM based visible light communications, Optics Communications, 356(1), pp. 136-140.

  4. Tsonev, D., Sinanovic, S., and Haas, H., (2012) Novel unipolar orthogonal frequency division multiplexing (U-OFDM) for optical wireless, Proc. of the IEEE Vehicular Technol. Conf. (VTC Spring), Yokohama, Japan, pp.1-5.

  5. Lakshmanan, M., Mohammed, V.N., Palanivelan, M., and Vamsikrishna, M.V.C., (2016) Channel estimation for MISO OFDM system using improved cyclic delay diversity, Telecommunications and Radio Engineering, 75(5), pp. 425-440.

  6. Shah, B., Dalwadi, G., Shah, H., and Kothari, N., (2018) Power-efficient LTE MACRO eNodeB: A comprehensive survey, Telecommunications and Radio Engineering, 77(16), pp. 1441-1462.

  7. Dhuness, K. and Maharaj, B.T.J, (2010) An offset modulation scheme to control the PAPR of an OFDM transmission, Proceedings of the IEEE 72nd Vehicular Technology Conference, Ottawa, Canada, pp. 1-5.

  8. Dhuness, K. and Maharaj, B.T., (2013) Analysis of an offset modulation transmission. EURASIP Journal on Wireless Communications and Networking, 19(1), pp. 1-15.

  9. Abdulkafi, A.A., Alias, M.Y., and Hussein, Y.S., (2017) A novel approach for PAPR reduction in OFDM-based visible light communications, IEEE 2017 International Conference on Platform Technology and Service (PlatCon), pp. 1-4.

  10. Abdulkafi, A.A., Alias, M.Y., Hussein, Y.S., Omar, N., and Salleh, M.K.B., (2018) A Hybrid PAPR Reduction Scheme for Optical Wireless OFDM Communication Systems, KSII Transactions on Internet & Information Systems, 12(3), pp. 1136-1151.

  11. Tsonev, D., Islim, MS., and Haas, H., (2016) OFDM-Based Visible Light Communications, Opt. Wireless Commun., Springer Int. Publ., pp. 255-298.

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