In this paper, a new network model for visible light communication (VLC) is proposed using delta-orthogonal multiple access (D-OMA) scheme and coordinated multi-point (CoMP) transmission. CoMP enables the coordination among the group of access points (APs) such that each user receives the signals from many access points and thereby achieves the diversity gain. Therefore, all the users experience good signal quality including the users in the boundary of the visible region. D-OMA allows the partial overlapping among the sub-bands of the non-orthogonal multiple access (NOMA) clusters to improve the massive access under allowable interference levels. A Closed form expression for the bit error rate (BER) of the proposed VLC network is derived. Also, optimal power allocation at the VLC transmitter is applied using Karush-Kuhn Tucker (KKT) conditions to maximize the user data rate. Numerical results demonstrate that the proposed CoMP-based D-OMA VLC network outperforms the existing NOMA scheme.
CoMP Based Delta-OMA Scheme for Visible Light Communications
2022-09-01
769204 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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