Impact of receiver's tilted angle on channel capacity in VLCs

• Published in: Electronics letters Vol. 53; no. 6; pp. 421 - 423
• Main Authors: Wang, Jin-Yuan, Li, Qing-Lin, Zhu, Jian-Xia, Wang, Yongjin
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 16.03.2017
• Subjects: Channel capacity; convex optimisation problem; convex programming; CVX toolbox; Electronics; free‐space optical communication; MATLAB; Optical communication; optimisation problem; Optimization; Planes; receiver plane; receiver tilted angle; Receivers; Upper bounds; visible light communications; VLC; visible light communications; convex optimisation problem; CVX toolbox; channel capacity; convex programming; receiver plane; free-space optical communication; receiver tilted angle; VLC; MATLAB; optimisation problem
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2016.4657

The impact of receiver's tilted angle on the channel capacity in visible light communications (VLCs) is investigated. First, the system model is analysed. On the basis of the system model, the lower and upper bounds on the channel capacity for the VLC are presented. An optimisation problem is formulated to improve the channel capacity by tilting the receiver plane. The proposed problem is shown to be a convex optimisation problem, which is efficiently solved by using the CVX toolbox for MATLAB. Numerical results show that the channel capacity can be dramatically improved by tilting the receiver plane properly.