Xiao Ye, Zhu Yi-Jun, Zhang Yan-Yu, Sun Zheng-Guo
Appl Opt. 2019 Feb 20;58(6):1433-1441. doi: 10.1364/AO.58.001433.
A fast-adaptive color-collaborative signal constellation (CCSC) is proposed for chromaticity-changeable multicolor multiple-input multiple-output (MIMO) visible light communications (VLC) systems. The design of CCSC aims at developing the constellation to minimize the average optical power with shaping-based lattice code. For multicolor VLC signals, we arrive at the fact that the optimum shape of the constellation bounding region is an inequilateral N-D simplex. With the densest lattice-packing structure, detailed design steps of CCSC are fully elaborated by lattice construction, effective point selection, and chromaticity adjustment. As CCSC has a low complexity, its constellation structure can adapt quickly to changeable chromaticity demands. Simulation results show that the performance of CCSC is better than enhanced standard color shift keying (CSK) and is close to iterative CSK modulation based on numerical search.
针对色度可变的多色多输入多输出（MIMO）可见光通信（VLC）系统，提出了一种快速自适应颜色协作信号星座（CCSC）。CCSC的设计旨在开发一种星座，通过基于整形的格码来最小化平均光功率。对于多色VLC信号，我们发现星座边界区域的最佳形状是一个非等边N维单纯形。凭借最密集的格填充结构，通过格构造、有效点选择和色度调整，详细阐述了CCSC的设计步骤。由于CCSC具有低复杂度，其星座结构能够快速适应可变的色度需求。仿真结果表明，CCSC的性能优于增强型标准色移键控（CSK），并接近基于数值搜索的迭代CSK调制。
