eprintid: 10189916 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/18/99/16 datestamp: 2024-04-04 14:35:23 lastmod: 2024-04-04 14:35:23 status_changed: 2024-04-04 14:35:23 type: article metadata_visibility: show sword_depositor: 699 creators_name: Miao, P creators_name: Chen, G creators_name: Yao, Y creators_name: Wong, KK creators_name: Chambers, JA title: Adaptive User Association for Dense Visible Light Communication Networks in the Presence of Nonlinear Impairments ispublished: inpress divisions: UCL divisions: B04 divisions: C05 divisions: F46 keywords: Visible light communication , Resource management , Light emitting diodes , Interference , Integrated circuits , Optimization , Nonlinear distortion note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: User-centric (UC) philosophy is a promising network formation method in light emitting diode enabled visible light communication (VLC) systems. Nevertheless, the nonlinear channel impairments restrict the overall system performance and have not been fully considered in the association structure designing. In this paper, an adaptive user association approach within the UC-cells formation of dense VLC networks is investigated under the consideration of practical nonlinear impairments and adjacent interference. It is mathematically formulated to be an achievable data rate maximization problem by coordinately determining the optimal candidates of access point, clipping ratio and information-carrying power. We divide this mixed combinatorial and non-convex optimization problem into two subproblems and delicately transform them to be binary nonlinear programming and constrained linear programming problems, respectively. In addition, we develop an efficient approach to obtain the local optimal solution with low-computational complexity in an alternating iterative way. Simulation results demonstrate that the proposed scheme has relatively fast convergence and shows robustness to the variation of complex interference patterns and nonlinear impairments. Moreover, it can achieve significant throughput gain as compared with the conventional schemes, demonstrating the prospect and validity of this methodology for dense VLC networks with actual nonlinear devices. date: 2024-02-20 date_type: published publisher: Institute of Electrical and Electronics Engineers (IEEE) official_url: http://dx.doi.org/10.1109/tcomm.2024.3367785 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2262448 doi: 10.1109/TCOMM.2024.3367785 lyricists_name: Wong, Kai-Kit lyricists_id: KWONG98 actors_name: Wong, Kai-Kit actors_id: KWONG98 actors_role: owner full_text_status: public publication: IEEE Transactions on Communications citation: Miao, P; Chen, G; Yao, Y; Wong, KK; Chambers, JA; (2024) Adaptive User Association for Dense Visible Light Communication Networks in the Presence of Nonlinear Impairments. IEEE Transactions on Communications 10.1109/TCOMM.2024.3367785 <https://doi.org/10.1109/TCOMM.2024.3367785>. (In press). Green open access document_url: https://discovery-pp.ucl.ac.uk/id/eprint/10189916/1/UC_Clipping-4.pdf