Demonstration of 575-Mb/s downlink and 225-Mb/s uplink bi-directional SCM-WDM visible light communication using RGB LED and phosphor-based LED.

By Yuanquan Wang, Yiguang Wang, N. Chi, Jianjun Yu, Huiliang Shang. Optics Express, 2013

314 citations recorded by the source corpus.

We propose and experimentally demonstrate a novel full-duplex bi-directional subcarrier multiplexing (SCM)-wavelength division multiplexing (WDM) visible light communication (VLC) system based on commercially available red-green-blue (RGB) light emitting diode (LED) and phosphor-based LED (P-LED) with 575-Mb/s downstream and 225-Mb/s upstream transmission, employing various modulation orders of quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM). For the downlink, red and green colors/wavelengths are assigned to carry useful information, while blue chip is just kept lighting to maintain the white color illumination, and for the uplink, the low-cost P-LED is implemented. In this demonstration, pre-equalization and post-equalization are also adopted to compensate the severe frequency response of LEDs. Using this scheme, 4-user downlink and 1-user uplink transmission can be achieved. Furthermore, it can support more users by adjusting the bandwidth of each sub-channel. Bit error rates (BERs) of all links are below pre-forward-error-correction (pre-FEC) threshold of 3.8x 10(-3) after 66-cm free-space delivery. The results show that this scheme has great potential in the practical VLC system.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/a298f0dbd331f87e05d96b7fe031d82cbdda623e

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In Electrical and Electronic Engineering

Citations in the corpus

Visible light communication: Applications, architecture, standardization and research challenges (2017, methodology): “In [29], a full-duplex bi-directional VLC system utilizing RGB LEDs and a commercially available phosphor-based LED in downlink and uplink, are proposed respectively.”
LED Based Indoor Visible Light Communications: State of the Art (2015, background): “Unlike IR, visible light satisfies the eye-and-skin safety regulations [38] making it”
Visible Light Communication: Concepts, Applications and Challenges (2019, background): “In addition to that, new light-emitting technologies, such as LEDs, become more popular and accessible, enabling new perspectives for optical wireless communication [7], [8].”