Non-Orthogonal Multiple Access for Visible Light Communications

Abstract

The main limitation of visible light communication (VLC) is the narrow modulation bandwidth, which reduces the achievable data rates. In this paper, we apply the non-orthogonal multiple access (NOMA) scheme to enhance the achievable throughput in high-rate VLC downlink networks. We first propose a novel gain ratio power allocation (GRPA) strategy that takes into account the users' channel conditions to ensure efficient and fair power allocation. Our results indicate that GRPA significantly enhances system performance compared to the static power allocation. We also study the effect of tuning the transmission angles of the light emitting diodes (LEDs) and the field of views (FOVs) of the receivers, and demonstrate that these parameters can offer new degrees of freedom to boost NOMA performance. Simulation results reveal that NOMA is a promising multiple access scheme for the downlink of VLC networks.

Published in IEEE Photonics Technology Letters. 4 pages, 5 figures

References in corpus (1)

• On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed Users

Cited by in corpus (9)

• Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
• Wireless Powered Communications with Non-Orthogonal Multiple Access
• Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions
• Sum-Rate Maximization for UAV-assisted Visible Light Communications using NOMA: Swarm Intelligence meets Machine Learning
• Multi-User Visible Light Communications: State-of-the-Art and Future Directions
• NOMA for Energy-Efficient LiFi-Enabled Bidirectional IoT Communication
• Optimizing Resource Allocation for QoS and Stability in Dynamic VLC-NOMA Networks via MARL
• A Novel Approach to Fair Power Allocation for NOMA in Visible Light Communication
• DRL-based Power Allocation in LiDAL-Assisted RLNC-NOMA OWC Systems