Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 31,
  • Issue 23,
  • pp. 3771-3779
  • (2013)

Tight Bounds on Channel Capacity for Dimmable Visible Light Communications

Not Accessible

Your library or personal account may give you access

Abstract

In this paper, the upper and lower bounds for the channel capacity of dimmable visible light communications(VLC) systems are investigated. Because the information is modulated into the instantaneous optical intensity, the transmitted optical intensity is represented by a nonnegative input that is corrupted by an additive white Gaussian noise. Considering the illumination support in a VLC system, the transmitted optical intensity signal must satisfy the illumination constraint, i.e., the average transmitted optical intensity is constrained by a target illumination intensity, which is determined by the nominal optical intensity of the light source devices and dimming target. An upper bound on the channel capacity is derived based on the signal space geometry via a sphere packing argument. A lower bound on the channel capacity is derived by maximizing the mutual information between the channel input and output. Both the upper and lower bounds are presented in closed forms. Furthermore, a closed-form optimal intensity distribution of the transmitted optical signal is obtained. The numerical results show that the presented bounds are very tight at the application zone of dimmable VLC links.

© 2013 IEEE

PDF Article
More Like This
Channel capacity and receiver deployment optimization for multi-input multi-output visible light communications

Jin-Yuan Wang, Jianxin Dai, Rui Guan, Linqiong Jia, Yongjin Wang, and Ming Chen
Opt. Express 24(12) 13060-13074 (2016)

Capacity analysis of underwater visible light communication systems over a lossy channel in the presence of noises

Gunjan Matta, Priya Pandey, Monika Agrawal, and Rajendar Bahl
J. Opt. Soc. Am. A 39(5) 948-958 (2022)

Capacity analysis for pulse amplitude modulated visible light communications with dimming control

Jin-Yuan Wang, Jun-Bo Wang, Nuo Huang, and Ming Chen
J. Opt. Soc. Am. A 31(3) 561-568 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved