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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2026-08-09
Capacity Improvement in Indoor VLC-NOMA Networks
By
Abdullah Hasan Chilmeran,

    Mr. Abdullah Hasan Chilmeran

    College of Engineering

    University of Ninevah

    Iraq

    Homepage

Safwan Hafeedh Younus

    Dr. Safwan Hafeedh Younus

    College of Electronics Engineering

    Ninevah University

    Iraq

    Homepage

Progress In Electromagnetics Research C, Vol. 172, 223-230, 2026
doi:10.2528/PIERC26062610 | Google Scholar

Abstract
Visible Light Communication (VLC) combined with Non-Orthogonal Multiple Access (NOMA) is a promising technology for meeting the high-capacity demands of future 6G indoor networks. Most existing VLC-NOMA user pairing schemes rely solely on the direct-link channel gain for user ordering and ignore wall reflections that introduce spatially nonuniform interference, thereby degrading successive interference cancellation (SIC) performance. To overcome these limitations, a user ranking based on the user's effective signal-to-interference-plus-noise ratio (SINR) from both direct and indirect links is proposed, and users are paired into independent pairs with balanced SINR separation through a SINR-based user pairing framework. The proposed framework reduces interference accumulation by isolating users into independent NOMA pairs, thereby improving scalability and throughput. The results of the MATLAB simulation demonstrate that the proposed scheme achieves a throughput of 710 Mbps for eight users, which is 274% higher than the 190 Mbps achieved by conventional NOMA. The proposed framework achieves 320 Mbps under imperfect SIC conditions, whereas conventional NOMA achieves 74 Mbps, demonstrating the robustness of the proposed framework under practical receiver impairments.
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Citation
Abdullah Hasan Chilmeran, and Safwan Hafeedh Younus, "Capacity Improvement in Indoor VLC-NOMA Networks," Progress In Electromagnetics Research C, Vol. 172, 223-230, 2026.
doi:10.2528/PIERC26062610
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