Title :
A Double-Layer VLC System With Low-Complexity ML Detection and Binary Constellation Designs
Author :
Huan-Yu Zhu ; Yi-Jun Zhu ; Jian-Kang Zhang ; Yan-Yu Zhang
Author_Institution :
Dept. of Commun. Eng., Inf. Sci. & Technol. Inst., Zhengzhou, China
Abstract :
We consider a double-layer visible light communication system where transmitted data is split into two layers with different priorities and variant transmission rates. High-priority data is assigned to the upper layer with low transmission rate, while low-priority data is assigned to the lower layer with higher transmission rate. For this scenario, we develop a low-complexity maximum likelihood detection algorithm. In addition, several binary constellation designs corresponding to different priority orders are presented. Computer simulations show that maximum likelihood detection detection significantly improves the error-rate performance, compared to sum detection, without compromising the computational complexity of the receiver.
Keywords :
maximum likelihood detection; binary constellation designs; double-layer VLC system; double-layer visible light communication system; error-rate performance; low-complexity ML detection; low-complexity maximum likelihood detection algorithm; Cameras; Light emitting diodes; MIMO; Maximum likelihood detection; Optical imaging; Receivers; Signal to noise ratio; Binary constellation design; imaging communication; maximum likelihood detection; multiple-input multiple output (MIMO); multiple-input multiple-output (MIMO); visible light communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2406696