Visible light communication based on space-division multiple access optical beamforming

Abstract

© 2014 Chinese Optics Letters. We propose and demonstrate a visible light communication (VLC) scheme based on space-division multiple access (SDMA) optical beamforming to accommodate multiple user devices in the VLC based on optical beamforming. SDMA optical beamforming is a technique which separates light-emitting diode light spatially and focuses each part on different target devices simultaneously. We show the experimental results of the VLC signal amplitudes, the optical power densities, and the bit-error rate performance as a function of transmission distance before and after the SDMA optical beamforming. The results show that the VLC signal amplitudes and optical power densities are improved by 8-2 and 3.8-5 dB, respectively, with the help of SDMA optical beamforming.