21 August 2017 Enhanced method with superposed signal-based visible light communication system using multiple-input signal-output beamforming
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Liang Qiao, Liang Qiao, Shangyu Liang, Shangyu Liang, Xingyu Lu, Xingyu Lu, Yingjun Zhou, Yingjun Zhou, Yi Jiang, Yi Jiang, Nan Chi, Nan Chi, } "Enhanced method with superposed signal-based visible light communication system using multiple-input signal-output beamforming," Optical Engineering 56(8), 086104 (21 August 2017). https://doi.org/10.1117/1.OE.56.8.086104 . Submission: Received: 5 June 2017; Accepted: 28 July 2017
Received: 5 June 2017; Accepted: 28 July 2017; Published: 21 August 2017
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