NDLI: Channel capacity for dimmable visible light communications

Content Provider	IEEE Xplore Digital Library
Author	Jun-Bo Wang Qing-Song Hu Jiangzhou Wang Yu-Hua Huang Jin-Yuan Wang
Copyright Year	2013
Description	Author affiliation: Sch. of Eng. & Digital Arts, Univ. of Kent, Canterbury, UK (Jiangzhou Wang) \|\| Coll. of Comput. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China (Qing-Song Hu; Yu-Hua Huang) \|\| Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China (Jun-Bo Wang; Jin-Yuan Wang)
Abstract	The transmitted optical intensity in visible light communications (VLC) system is represented by a nonnegative input, which is corrupted by an additive white Gaussian noise. In this paper, we consider that the transmitted optical intensity signal must satisfy the illumination constraint to fulfill the illumination support in VLC system. So the average transmitted optical intensity is constrained by a target illumination intensity which is determined by the nominal optical intensity of light source devices and the dimming target. The derivation of the upper bound is based on signal space geometry via a sphere-packing argument. The lower bound is derived through the maximum mutual information between the channel input and output, which is determined by the source entropy maximization. Both the bounds are presented in terms of the closed forms. The numerical results show that the presented bounds are very tight at the application zone of dimmable VLC links.
Sponsorship	IEEE Commun. Soc.
Starting Page	2424
Ending Page	2429
File Size	1145540
Page Count	6
File Format	PDF
ISBN	9781479913534
DOI	10.1109/GLOCOM.2013.6831437
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical modulation Optical fiber communication Upper bound Bandwidth Optimization TV
Content Type	Text
Resource Type	Article

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