Efficient signal design and optimal power allocation for visible light communication attocell systems

Sun Zheng-Guo; Yu Hongyi; Zhu Yi-Jun

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Efficient signal design and optimal power allocation for visible light communication attocell systems

机译：高效信号设计和可见光通信Atocell系统的最优功率分配

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In this paper, we investigate visible light communication (VLC) attocell systems in which any two neighboring attocells overlap. An efficient signal design for VLC called time superposition reuse (TSR) is proposed to mitigate interference and improve spectral efficiency. In the scheme, two neighboring cells are allocated with two time slots that have superposition in the time domain. By adjusting superposition between time slots, the system can achieve a flexible spectral efficiency and system performance. Further, we develop an optimal power allocation strategy for TSR in the system. The strategy is given according to the position of the user and the level of superposition, and then the corresponding optimal Euclidean distance is derived. In addition, we analyze the system performance and prove that the optimal Euclidean distance is an increasing function of the delay between signals and a decreasing function of the sampling period. Simulation results demonstrate that the optimal power allocation has a better performance than uniform power allocation and TSR outperforms time division multiple access significantly for the user in VLC attocell systems. (C) 2017 Optical Society of America

机译：在本文中，我们研究了可见光通信（VLC）Attocell系统，其中任何两个相邻的Attocells重叠。提出了一种称为时间叠加重用（TSR）的VLC的有效信号设计，以减轻干扰并提高光谱效率。在该方案中，两个相邻小区分配有两个时隙中具有叠加的两个时隙。通过调整时隙之间的叠加，系统可以实现灵活的频谱效率和系统性能。此外，我们开发了系统中TSR的最佳功率分配策略。根据用户的位置和叠加水平给出该策略，然后导出相应的最佳欧几里德距离。此外，我们分析了系统性能并证明了最佳欧几里德距离是信号之间延迟的延迟和采样周期的降低功能的越来越多的函数。仿真结果表明，最佳功率分配具有比均匀功率分配更好的性能，并且对于VLC Atocell系统中的用户显着优于TSR的时间句多次访问。（c）2017年光学学会

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《Applied optics》 |2017年第32期|共10页
作者
Sun Zheng-Guo; Yu Hongyi; Zhu Yi-Jun;
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Natl Digital Switching Syst Engn &

Technol Res Ct Zhengzhou 450000 Henan Peoples R China;

Natl Digital Switching Syst Engn &

Technol Res Ct Zhengzhou 450000 Henan Peoples R China;

Natl Digital Switching Syst Engn &

Technol Res Ct Zhengzhou 450000 Henan Peoples R China;

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Efficient signal design and optimal power allocation for visible light communication attocell systems

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