Abstract Next significant revolution of virtual/augmented reality and Internet of things show the remarkable demands of next-generation indoor mobile real-time data transmission are high spectral-efficiency, high-speed and high-density deep coverage. Multi-color visible light communication (MC-VLC) has remarkable potential to confront the challenges due to the large equivalent bandwidth index and extensively installed of multi-color light emitting diodes. However, although optical filters are utilized, there are wide spectrum interference (WSI) in MC-VLC system. Meanwhile, the alignment and availability of photodiodes (PDs) greatly influence the WSI and target signal (TS). So the real-time optimal tracking angles (ROTAs) of PDs is proposed to obtain the optimal alignment minimizing the total interference signal ratio to achieve trade-off of WSI and TS. The optimal problem is formulated and the alternative tracking angles sets are obtained to prepare for the analytic solution of ROTAs. The ROTAs has extremely low complexity, and the result of that converges on the numerical solution of exhaustive search. Better BER performance can be achieved by system with ROTAs than with fixed tracking angles at different relative offset angle between the transmitter and the receiver.

中文翻译：

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室内移动场景下MC-VLC光电二极管实时优化跟踪角度

摘要 虚拟/增强现实和物联网的下一次重大革命表明，下一代室内移动实时数据传输的显着需求是高频谱效率、高速和高密度的深度覆盖。多色可见光通信（MC-VLC）由于等效带宽指数大和多色发光二极管的广泛安装而具有应对挑战的巨大潜力。然而，尽管使用了光学滤波器，但在 MC-VLC 系统中存在广谱干扰 (WSI)。同时，光电二极管 (PD) 的对准和可用性极大地影响 WSI 和目标信号 (TS)。因此，提出了 PD 的实时最佳跟踪角 (ROTA)，以获得最小化总干扰信号比的最佳对准，以实现 WSI 和 TS 的权衡。制定最优问题并获得替代跟踪角度集，为 ROTA 的解析解做准备。ROTA 的复杂度极低，其结果收敛于穷举搜索的数值解。与在发射机和接收机之间的不同相对偏移角下使用固定跟踪角的系统相比，具有 ROTA 的系统可以获得更好的 BER 性能。并且其结果收敛于穷举搜索的数值解。与在发射机和接收机之间的不同相对偏移角下固定跟踪角的系统相比，具有 ROTA 的系统可以获得更好的 BER 性能。并且其结果收敛于穷举搜索的数值解。与在发射机和接收机之间的不同相对偏移角下使用固定跟踪角的系统相比，具有 ROTA 的系统可以获得更好的 BER 性能。