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International Wireless Internet Conference

WiCON 2017: Wireless Internet pp 328–337Cite as

A Novel Optical Index Modulation Aided DCO-OFDM Scheme for VLC Systems

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Abstract

In this paper, a novel optical index modulation (OIM) aided direct-current (DC) biased optical OFDM (OIM-DCO-OFDM) scheme for visible light communication (VLC) systems is proposed. Different with traditional index modulation schemes, the proposed OIM-DCO-OFDM scheme uses index bits to determine which subcarrier transmit original signals and which subcarrier transmit conjugate signals. The constellation of traditional phase-shift keying (PSK) and quadrature amplitude modulation (QAM) is symmetrical about the real axis. It means that we cannot distinguish the original signals and conjugate signals. In order to recover index bits at the receiver, we propose a unipolar pulse amplitude modulation (PAM) scheme for the modulation of constellation bits, and design a zero-forcing (ZF) based detector. Compared with dual-mode index modulation aided DCO-OFDM (DM-DCO-OFDM) scheme, the proposed scheme has 1 dB and 2 dB performance gain at the bit error rate (BER) level of \({10^{-4}}\) when the spectral efficiency is 1.21 bits/s/Hz and 2.18 bits/s/Hz, respectively. The proposed OIM-DCO-OFDM scheme can achieve 80% spectral efficiency improvement than the DM-DCO-OFDM scheme at the modulation order of \(M = 4\).

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Acknowledgement

The authors gratefully acknowledge the support from Natural Science Foundation of China (No. 61371110), Fundamental Research Funds of Shandong University (No. 2017JC029), Key R&D Program of Shandong Province (No. 2016GGX101014), Shandong Provincial Natural Science Foundation (No. ZR2017MF012), Science and Technology Project of Guangzhou (No. 201704030105), EPSRC TOUCAN project (Grant No. EP/L020009/1), and EU H2020 RISE TESTBED project (Grant No. 734325).

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Authors and Affiliations

  1. School of Engineering, School of Information Science and Engineering, Institute of Sensors, Signals and Systems, Shandong University, Jinan, 250100, Shandong, People’s Republic of China

    Haodong Li, Jian Sun & Wensheng Zhang

  2. Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK

    Cheng-Xiang Wang

Authors
  1. Haodong Li
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  2. Jian Sun
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  3. Wensheng Zhang
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  4. Cheng-Xiang Wang
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Corresponding author

Correspondence to Wensheng Zhang .

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Editors and Affiliations

  1. Electrical and Computer Engineering, Memorial University, St. John’s, Newfoundland and Labrador, Canada

    Cheng Li

  2. Electrical and Computer Engineering, Auburn University, Auburn, Alabama, USA

    Shiwen Mao

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© 2018 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Li, H., Sun, J., Zhang, W., Wang, CX. (2018). A Novel Optical Index Modulation Aided DCO-OFDM Scheme for VLC Systems. In: Li, C., Mao, S. (eds) Wireless Internet. WiCON 2017. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 230. Springer, Cham. https://doi.org/10.1007/978-3-319-90802-1_29

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  • DOI: https://doi.org/10.1007/978-3-319-90802-1_29

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-90801-4

  • Online ISBN: 978-3-319-90802-1

  • eBook Packages: Computer ScienceComputer Science (R0)

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