Spatial Quadrature Modulation for Visible Light Communication in Indoor Environment

Dawoud, D. W., Heliot, F., Imran, M. A. and Tafazolli, R. (2017) Spatial Quadrature Modulation for Visible Light Communication in Indoor Environment. In: IEEE ICC 2017 Optical Networks and Systems Symposium, Paris, France, 21-25 May 2017, ISBN 9781467389990 (doi:10.1109/ICC.2017.7996765)

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In this paper, a novel low-complexity and spectrally efficient modulation scheme for visible light communication (VLC) is proposed. Our new spatial quadrature modulation (SQM) is designed to efficiently adapt traditional complex modulation schemes to VLC; i.e. converting multi-level quadrature amplitude modulation (M-QAM), to real-unipolar symbols, making it suitable for transmission over light intensity. The proposed SQM relies on the spatial domain to convey the orthogonality and polarity of the complex signals, rather than mapping bits to symbol as in existing spatial modulation (SM) schemes. The detailed symbol error analysis of SQM is derived and the derivation is validated with link level simulation results. Using simulation and derived results, we also provide a performance comparison between the proposed SQM and SM. Simulation results demonstrate that SQM could achieve a better symbol error rate (SER) and/or data rate performance compared to the state of the art in SM; for instance a Eb/No gain of at least 5 dB at a SER of 10-4.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Dawoud, D. W., Heliot, F., Imran, M. A., and Tafazolli, R.
College/School:College of Science and Engineering > School of Engineering
Copyright Holders:Copyright © 2017 IEEE
First Published:First published in 2017 IEEE International Conference on Communications (ICC)
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher
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