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Optical Engineering

Enhanced method with superposed signal-based visible light communication system using multiple-input signal-output beamforming
Author(s): Liang Qiao; Shangyu Liang; Xingyu Lu; Yingjun Zhou; Yi Jiang; Nan Chi
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Paper Abstract

As a promising candidate technology for the next generation communication systems, visible light communication (VLC), combined with high modulation and coding schemes, can be used to achieve throughput much higher than the traditional RF wireless ones. We propose adopting multiple light-emitting diodes (LEDs) on the transmit side to form a multiple-input signal-output (MISO) VLC system. Through the maximum ratio transmit beamforming, the signals from the multiple LEDs can be added coherently at the receiver side, and, therefore, the signal-to-noise ratio of the system can be improved slightly. Meanwhile, a method of channel estimation with superposed signal is employed for better channel estimation. Extensive lab experiments demonstrate that a two-LED MISO-VLC system can achieve a data rate of 1.0  Gbit/s over a free-space link of 1.2 m.

Paper Details

Date Published: 21 August 2017
PDF: 5 pages
Opt. Eng. 56(8) 086104 doi: 10.1117/1.OE.56.8.086104
Published in: Optical Engineering Volume 56, Issue 8
Show Author Affiliations
Liang Qiao, Fudan Univ. (China)
Shangyu Liang, Fudan Univ. (China)
Xingyu Lu, Fudan Univ. (China)
Yingjun Zhou, Fudan Univ. (China)
Yi Jiang, Fudan Univ. (China)
Nan Chi, Fudan Univ. (China)

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