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On the Performance of Visible Light Communication Systems with Non-Orthogonal Multiple Access

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Details

Original languageEnglish
Pages (from-to)6350-6364
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number10
DOIs
Publication statusPublished - 1 Oct 2017
Publication typeA1 Journal article-refereed

Abstract

Visible light communication (VLC) has been proposed as a promising and efficient solution to indoor ubiquitous broadband connectivity. In this paper, non-orthogonal multiple access, which has been recently introduced as an effective scheme for fifth generation (5G) wireless networks, is considered in the context of VLC systems under different channel uncertainty models. To this end, we first derive a novel closed-form expression for the bit-error-rate (BER) under perfect channel state information (CSI). Capitalizing on this, we then quantify the effect of noisy and outdated CSI by deriving a simple and accurate approximation for the former and a tight upper bound for the latter. The offered results are corroborated by respective results from extensive Monte Carlo simulations and assist in developing useful insights on the effect of imperfect CSI knowledge on the overall system performance. Furthermore, it was shown that while noisy CSI leads to slight degradation in the BER performance, outdated CSI can cause considerable performance degradation, if the order of the users' channel gains change due to the involved mobility.

Keywords

  • bit-error-rate, dimming control, imperfect channel state information, non-orthogonal multiple access, Visible light communications

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