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On the Achievable Max-Min User Rates in Multi-Carrier Centralized NOMA-VLC Networks.

Omar Maraqa1, Umair F Siddiqi2, Saad Al-Ahmadi1

  • 1Department of Electrical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

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Summary
This summary is machine-generated.

This study optimizes resource allocation in visible light communication (VLC) networks using non-orthogonal multiple access (NOMA). It enhances spectral efficiency and user fairness for future high-data-rate applications.

Keywords:
centralized light access network (C-LiAN)max-min user ratenon-orthogonal multiple access (NOMA)optimizationsimulated annealing (SA) algorithmsubcarrier allocationvisible light communications (VLC)

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Area of Science:

  • Wireless Communications
  • Optical Communications
  • Network Engineering

Background:

  • Visible Light Communications (VLC) is a key technology for short-distance, high-data-rate applications in future beyond 5G networks.
  • Non-Orthogonal Multiple Access (NOMA) is a promising scheme for meeting spectral efficiency and user fairness requirements in these networks.

Purpose of the Study:

  • To maximize the max-min rate in a multi-cell indoor centralized VLC network.
  • To optimize user pairing, subcarrier allocation, and power allocation for NOMA-enabled VLC systems.

Main Methods:

  • The study employs the divide-and-next-largest-difference user-pairing algorithm (D-NLUPA) for user pairing.
  • Subcarrier and power allocation are solved iteratively using Simulated Annealing (SA) and the bisection method.

Main Results:

  • The research quantifies achievable max-min user rates for various NOMA-enabled schemes in VLC networks.
  • The proposed low-complexity solution effectively tackles the joint optimization problem.

Conclusions:

  • The findings provide insights into the performance and design of multi-user, multi-carrier NOMA-enabled centralized VLC networks.
  • This work contributes to the advancement of efficient resource allocation strategies in next-generation wireless communication systems.