Author
Siddiqi, U. F., Sait, S. M., Demir, Muhammet Selim, Uysal, Murat
Publication Date
2019
Publication Place
-
IEEE
Subject
Visible light communications, Resource allocation, Optimization, Simulated annealing, Heuristics
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
2169-3536
Record ID
58e954d4-d471-4900-b36d-25919c082ebd
Library Location
Electrical & Electronics Engineering
Date
2019
Notes
King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia ; TÜBİTAK
Sample Text
In this paper, we consider a visible light communication (VLC) system with direct current-biased orthogonal frequency division multiplexing (DC-OFDM) and investigate resource allocation for a multi-user environment. Based on the user satisfaction index as a function of data rate, we aim to optimally determine the allocation of the users to different LEDs (acting as access points) and 0I-DM subcarriers. We propose a simulated annealing-based heuristic to maximize the average user satisfaction index. In an effort to make the proposed solution practically feasible, the runtime of the proposed heuristic is kept less than the channel coherence time, whose value is in order of tens of milliseconds. We evaluate the performance of the proposed heuristic algorithm in different scenarios that vary in the number of users, the number of LEDs, and the separation between users. Our results demonstrate that the proposed heuristic outperforms other well-known heuristics (such as standard simulated annealing, iterative greedy, particle swarm optimization, and tabu search) while achieving good quality solutions within a short execution time, i.e., 40-80 ms.
DOI
10.1109/ACCESS.2019.2917051
Cilt
7
