Novel colour-clustered multiuser visible light communication

作者：Bandara Kasun; Chung Yeon Ho^*

来源：European Transactions on Telecommunications, 2014, 25(6): 579-590.

DOI：10.1002/ett.2829

Visible light has a large spectral bandwidth spanning its wavelength between about 380 and 740nm. These wavelengths create a band of colours. In this study, we propose a novel multiuser (MU) access scheme exploiting colour bands, which we define as colour clusters. In the proposed colour-clustered MU visible light communication system, the users are allocated into separate colour clusters, and the intensity modulated user data are transmitted through the allocated coloured beams from the red, green and blue light emitting diodes. In order to increase user capacity, a secondary user separation is performed by assigning user specific intensity levels via on-off-keying modulation. At the receiver, the primary user separation is performed by a colour sensor that is capable of distinguishing the colours between red, green and blue colour bands. A secondary user separation criterion has also been proposed. The proposed MU-visible light communication (VLC) system is complete in that it encompasses transmission and detection methods for multiple user access while ensuring a colour-controlled flicker-free illumination. The simulations demonstrate that the proposed MU-VLC system provides an efficient MU VLC platform with significant performances over various transmission scenarios.

• 出版日期2014-6