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Capacity and Optimum Signal Constellations for VLC Systems

In this article, the capacity of the point-to-point VLC system is investigated by means of a functional analysis subjected to amplitude constraint and average intensity constraint. It is proved that the capacity can be achieved by a unique probability density function (PDF). The necessary and sufficient condition for the capacity-achieving PDF is derived by the functional optimization theorem. Moreover, the capacity-achieving PDF is proved to be discrete and finite. Based on these properties, the capacity-achieving constellation optimization problems under amplitude constraint and average intensity constraint is formulated and an algorithm is proposed to solve the corresponding problem. To apply simple adaptive modulation in practical VLC systems, constellation optimization problem subject to an additional equal probability constraint is formulated and solved by maximizing the mutual information as well.

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Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.38 No.8 April 15 2020

No. Panggil

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Penerbit

: .,

Deskripsi Fisik

p. 2180 - 2189

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

-

Edisi

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Subjek

VISIBLE LIGHT COMMUNICATION
CAPACITY-ACHIEVING PDF
CONSTELLATION OPTIMIZATION
AMPLITUDE CONSTRAINT
AVERAGE INTENSITY CONSTRAINT

Info Detail Spesifik

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Pernyataan Tanggungjawab

Linqiong Jia, Feng Shu, Nuo Huang, Ming Chen, Jiangzhou Wang

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