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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 3 — Mar. 1, 2014
  • pp: 561–568

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

Jin-Yuan Wang, Jun-Bo Wang, Nuo Huang, and Ming Chen  »View Author Affiliations


JOSA A, Vol. 31, Issue 3, pp. 561-568 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000561


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Abstract

This paper focuses on the capacity-approaching, nonuniform signaling for the pulse amplitude modulated (PAM) visible light communications under the non-negativity, peak power, and dimmable average power constraints. The input distribution is characterized by three parameters, i.e., the intensities, the probabilities, and the number of mass points in the PAM constellation. In the open literature, no analytical expression can be used to obtain the capacity-achieving input distribution. In this paper, a computationally simple but capacity-approaching input distribution is alternatively derived by determining the three aforementioned parameters. The resulting input distribution can serve as a useful tool not to approach the channel capacity but to guide the practical system design. Numerical results substantiate that the derived input distribution is a capacity-approaching distribution and can offer a better performance gain in comparison with the commonly employed uniform input distribution.

© 2014 Optical Society of America

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(230.3670) Optical devices : Light-emitting diodes
(230.5170) Optical devices : Photodiodes
(200.2605) Optics in computing : Free-space optical communication

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 7, 2013
Revised Manuscript: December 24, 2013
Manuscript Accepted: December 25, 2013
Published: February 14, 2014

Citation
Jin-Yuan Wang, Jun-Bo Wang, Nuo Huang, and Ming Chen, "Capacity analysis for pulse amplitude modulated visible light communications with dimming control," J. Opt. Soc. Am. A 31, 561-568 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-3-561


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