Journal of Communications and Information Networks ›› 2017, Vol. 2 ›› Issue (4): 28-35.doi: 10.1007/s41650-017-0043-5

• Special Focus: Optical Wireless Communication • Previous Articles     Next Articles

Power optimization under brightness and communication requirements for visible light communication based on MacAdam ellipse

Lou Shun1(),Gong Chen1(),Wu Nan1(),Xu Zhengyuan1,2()   

  1. 1 Key Laboratory of Wireless-Optical Communications,Chinese Academy of Sciences,School of Information Science and Technology,University of Science and Technology of China,Hefei 230027,China
    2 Shenzhen Graduate School,Tsinghua University,Shenzhen 518055,China
  • Online:2017-12-25 Published:2017-12-29
  • Supported by:
    National Key Basic Research Program of China;Key Program of National Natural Science Foundation of China;Key Research Program of Frontier Sciences of CAS;Key Project in Science and Technology of Guangdong Province;Shenzhen Peacock Plan;the Fundamental Research Funds for the Central Universities


Data transmission with RGB LEDs is attracting significant research interest in VLC (Visible Light Communication).We consider the power optimization under brightness and communication requirements for RGB LEDs,and model the color constraint using the MacAdam ellipse instead of a fixed point in the chromaticity diagram.Then an optimization problem is formulated to determine the transmission power consumption and the corresponding coordinates in the chromaticity diagram.We propose a novel two-step algorithm to solve the optimization problem with lower implementation complexity.Numerical results show that the proposed approach shows the same performance as the optimal solution using a brute-force method,and requires the lower power consumption using MacAdam ellipse instead of merely a fixed point in the chromaticity diagram.

Key words: VLC, power optimization, RGB LEDs, chromaticity diagram, MacAdam ellipse

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