Constant Transmission Efficiency Dimming Control Scheme for VLC Systems

• Main Authors: Jia-Ning Guo, Jian Zhang, Gang Xin, Lin Li
• Format: Article
• Language: English
• Published: MDPI AG 2021-12-01
• Series: Photonics
• Subjects: visible light communication (VLC); dimming control; constant transmission efficiency; error performance; light-emitting diode (LED)
• Online Access: https://www.mdpi.com/2304-6732/8/1/7

As a novel mode of indoor wireless communication, visible light communication (VLC) should consider the illumination functions besides the primary communication function. Dimming control is one of the most crucial illumination functions for VLC systems. However, the transmission efficiency of most proposed dimming control schemes changes as the dimming factor changes. A block coding-based dimming control scheme has been proposed for constant transmission efficiency VLC systems, but there is still room for improvement in dimming range and error performance. In this paper, we propose a dimming control scheme based on extensional constant weight codeword sets to achieve constant transmission efficiency. Meanwhile, we also provide a low implementation complexity decoding algorithm for the scheme. Finally, comparisons show that the proposed scheme can provide a wider dimming range and better error performance.