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Communication Dans Un Congrès Année : 2023

Power Allocation Techniques for Non-orthogonal Multiple Access Based MIMO Visible Light Communication Systems

Résumé

Visible light communication (VLC) is a promising solution for indoor wireless connectivity but its capacity is hindered owing to the light-emitting diodes (LEDs) bandwidth limitation. In this paper, a non-orthogonal multiple access (NOMA) scheme is applied with a multiple-input multiple-output (MIMO) technique for enhancing the achievable rate of VLC systems. As the NOMA performance is extremely affected by the power allocation technique, we evaluate, in an indoor 2x2 MIMO-VLC system based on the NOMA scheme, the performance of three efficient and low-complexity power allocation schemes: fixed power allocation (FPA), gain ratio power allocation (GRPA), normalized gain difference power allocation (NGDPA). According to the results we obtained, the system's best achievable rate was achieved using the FPA with a power allocation factor of 0.9. Moreover, the superiority of FPA over NGDPA and GRPA is clearly highlighted through our simulation results in a two-user case scenario with a sum rate enhancement of 3.7% and 18.7%, respectively.
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Dates et versions

hal-04296350 , version 1 (20-11-2023)

Identifiants

Citer

Hesham Sadat Ibrahim, Mohamed Abaza, Ali Mansour, Ayman Alfalou. Power Allocation Techniques for Non-orthogonal Multiple Access Based MIMO Visible Light Communication Systems. 2023 8th International Conference on Signal and Image Processing (ICSIP), Jul 2023, Wuxi, China. pp.930-934, ⟨10.1109/ICSIP57908.2023.10270852⟩. ⟨hal-04296350⟩
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