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首页RGB VLC功率优化:基于MacAdam椭圆的亮度与通信需求研究
RGB VLC功率优化:基于MacAdam椭圆的亮度与通信需求研究
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本文探讨了在可见光通信(VLC)中利用RGB发光二极管(RGB LEDs)进行数据传输的前沿研究,着重于功率优化问题,尤其是在亮度和通信需求的平衡上。传统的VLC系统通常依赖于单一颜色的LED,而本文创新地将颜色约束模型化为MacAdam椭圆,而非固定在色度图上的单一点。MacAdam椭圆是色彩视觉心理学中用来描述人眼对色彩差异敏感性的标准模型,它能更好地反映人类色彩感知的实际范围。 在这一研究中,作者提出了一个新颖的两步优化算法。首先,他们将问题转化为一个数学模型,该模型考虑了RGB LED发出的光线的色度和亮度特性,以及接收端对色彩准确性的要求,通过MacAdam椭圆的形式确保了色彩的一致性。优化的目标是找到既能满足用户视觉体验(亮度)又能实现高效数据传输(低功率消耗)的最佳功率分配方案。 优化问题的解决过程包括两个步骤:第一步,确定每个颜色分量(红、绿、蓝)的功率分配,以最大化效率并保持在椭圆内的色彩稳定性;第二步,通过迭代或搜索算法,调整总功率消耗,同时控制在色度图上的坐标位置,以达到最佳的功率利用和视觉效果。这种方法旨在降低实现复杂度,同时提供了一个更符合人眼视觉感知的通信方案。 此外,文章发表在《通信与信息网络》期刊,表明这项工作是在无线光通信领域的重要贡献,对未来的VLC系统设计具有指导意义。通过将色彩感知的理论与实际通信需求相结合,研究人员有望开发出更加节能且用户体验更好的 VLC 系统,这无疑推动了 VLC 技术的实用化进程。
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Journal of Communications and Information Networks
Vol.2, No.4, Dec. 2017
DOI: 10.1007/s41650-017-0043-5
Research paper
Power optimization under brightness and
communication requirements for visible light
communication based on MacAdam ellipse
Shun Lou
1
, Chen Gong
1
, Nan Wu
1
, Zhengyuan Xu
1,2
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
Abstract: Data transmission with RGB LEDs is attracting significant research interest in VLC (Visible
Light Communication). We consider the power optimization under brightness and communication require-
ments 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.
Keywords: VLC, power optimization, RGB LEDs, chromaticity diagram, MacAdam ellipse, cone program-
ming
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Citation: S. Lou, C. Gong, N. Wu, et al. Power optimization under brightness and communication re-
quirements for visible light communication based on MacAdam ellipse [J]. Journal of communications and
information networks, 2017, 2(4): 28-35.
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1 Introduction
In recent years, VLC is attracting more and more
attention
[1]
, and has been regarded as a potential
candidate for the future short-range communication
with high speed
[2]
. A common realization is to use
a white LED as the transmitter
[3]
, due to its long
service life, less heat emission and low power con-
sumption. Two common approaches are used to
produce white light illumination LEDs. One is to
stimulate the yellow fluorescent powder through a
blue LED. The other is to mix red, green and blue
light to produce white light that is stimulated by
three wavelength fluorescent powder. The latter one
is preferred for high communication rate require-
ments, due to the larger bandwidth for RGB pure
Manuscript received Jun. 04, 2017; accepted Jul. 25, 2017
This work was supported by National Key Basic Research Program of China (No. 2013CB329201), Key Program of National
Natural Science Foundation of China (No. 61631018), Key Research Program of Frontier Sciences of CAS (No. QYZDY-SSW-
JSC003), Key Project in Science and Technology of Guangdong Province (No. 2014B010119001), Shenzhen Peacock Plan (No.
1108170036003286), and the Fundamental Research Funds for the Central Universities.
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