DS-CDMA Assisted Visible Light Communications Systems

He, C., Yang, L.-l., Xiao, P. and Imran, M. A. (2015) DS-CDMA Assisted Visible Light Communications Systems. In: 2015 IEEE 20th International Workshop on Computer Aided Modelling and Design of Communication Links and Networks (CAMAD), Guildford, United Kingdom, 07-09 Sep 2015, pp. 27-32. ISBN 9781467381864 (doi:10.1109/CAMAD.2015.7390475)

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In this contribution we propose and investigate the performance of Direct Sequence Code Division Multiple Access (DS-CDMA) based VLC system using M-ary orthogonal modulation under Additive White Gaussian Noise (AWGN) channel. Various types of spreading code sequences are considered, including the modified binary sequences previously used in wireless CDMA systems and the optical orthogonal code (OOC) which is widely employed in the optical domain. For each code set correlation property is studied for the purpose of predicting whether its corresponding multiple access interference (MAI) is tolerable. Furthermore, sophisticated code designs are proposed to improve the system performance while reducing the overall MAI effect under specified channel conditions. The numerical results show that the performance of optical wireless networks can be enhanced with the proposed spreading code design.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: He, C., Yang, L.-l., Xiao, P., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering

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