Luna-Rivera J M, Perez-Jimenez R, Rabadan-Borjes J, Rufo-Torres J, Guerra V, Suarez-Rodriguez C
Opt Express. 2014 Oct 6;22(20):24256-67. doi: 10.1364/OE.22.024256.
Color Shift Keying (CSK) is a new modulation scheme for visible light communication systems using RGB LEDs which has been standardized in the PHY III level of the IEEE 802.15.7. This paper proposes some modifications so as to include multiuser capabilities provided by a time-based multiplexing, with the modulation constellation symbols being adapted to encode data with the luminux powers of the red, green and blue color bands respectively. This is achieved by employing a simple and low-complexity time-based pulse signals structure to separate the users' data symbols, while a three-dimensional signal constellation design is merged to improve data throughput. Numerical simulations are carried out to assess the performance of this novel architecture. The statistical properties of the transmitted RGB signals ensure dimming capabilities and that the illumination function is unaffected by flickering.
色移键控（CSK）是一种用于使用RGB发光二极管的可见光通信系统的新型调制方案，该方案已在IEEE 802.15.7的物理层III级实现标准化。本文提出了一些修改，以便通过基于时间的复用提供多用户能力，其中调制星座符号分别通过红色、绿色和蓝色色带的光通量功率来编码数据。这是通过采用简单且低复杂度的基于时间的脉冲信号结构来分离用户数据符号来实现的，同时合并三维信号星座设计以提高数据吞吐量。进行了数值模拟以评估这种新型架构的性能。所传输的RGB信号的统计特性确保了调光能力，并且照明功能不受闪烁影响。
