Joint Dimming and Data Transmission Optimization for Multi-User Visible Light Communication System | Zendy

Sike Yao | Zendy; Xiaoyu Zhang | Zendy; Hua Qian | Zendy; Xiliang Luo | Zendy

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Joint Dimming and Data Transmission Optimization for Multi-User Visible Light Communication System

Author(s) -

Sike Yao,

Xiaoyu Zhang,

Hua Qian,

Xiliang Luo

Publication year - 2017

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2017.2681798

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

Visible light communication (VLC) is regarded as a promising technology for indoor communications due to its safety, availability, and efficiency. By deploying multiple light-emitting diodes (LEDs) at the transmitter, high data rate can be achieved. On the other hand, the dimming control is necessary in VLC systems to meet the lighting requirements, and puts an additional constraint to the system design. Thus, providing required communication quality while preserving the maximum dimming control capability becomes the baseline design philosophy for VLC systems. In this paper, we focus on multi-user multiple-input multiple-output VLC systems and propose a joint beamforming and direct current bias design. The proposed scheme can be formulated as an optimization problem and finds the minimum dimming level subject to the transmission rate requirement as well as the lighting constraints. Semi-definite program method and concave-convex procedure are exploited to solve the optimization problem efficiently. The impacts of locations of LEDs and users to the dimming control are also studied with numerical results.

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