Fast and efficient adaptation techniques for visible light communication systems
Fast and efficient adaptation techniques for visible light communication systems
复制标题
可见光通信系统快速高效的适应技术
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Elmirghani
中科院分区：
文献类型：
--
作者：
A. T. Hussein;M. Alresheedi;J. Elmirghani
光束操纵可见光通信(VLC)系统已被证明提供了比传统VLC系统更高的性能。然而，计算成本也会增加。在本文中，我们引入了快速计算生成全息图来加快自适应过程。这种新的、快速、高效的全自适应VLC系统可以提高接收机的信噪比，减少估计VLC接收机位置所需的时间。它还可以适应环境变化，提供强大的链接，防止信号阻塞和阴影。此外，采用角度分集接收机和时延自适应技术来减小码间干扰和多径色散的影响。在VLC信道带宽超过26 GHz的情况下，信噪比得到了显著增强，从而产生了紧凑的脉冲响应，并且VLC系统能够在所考虑的现实室内环境中实现更高的数据速率(25Gbps)和完全移动性。
Beam steering visible light communication (VLC) systems have been shown to offer performance enhancements over traditional VLC systems. However, an increase in the computational cost is incurred. In this paper, we introduce fast computer-generated holograms to speed up the adaptation process. The new, fast, and efficient fully adaptive VLC system can improve the receiver signal-to-noise ratio (SNR) and reduce the required time to estimate the position of the VLC receiver. It can also adapt to environmental changes, providing a robust link against signal blockage and shadowing. In addition, an angle diversity receiver and a delay adaptation technique are used to reduce the effect of intersymbol interference and multipath dispersion. Significant enhancements in the SNR with VLC channel bandwidths of more than 26 GHz are obtained, resulting in a compact impulse response and a VLC system that is able to achieve higher data rates (25 Gbps) with full mobility in the considered realistic indoor environment.