Tracking Control of the Mobile Terminal in an Active Free-Space Optical Communication System
Tracking Control of the Mobile Terminal in an Active Free-Space Optical Communication System
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DOI：
10.1109/sice.2006.315792
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
K. Yoshida;T. Tsujimura
中科院分区：
文献类型：
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作者：
K. Yoshida;T. Tsujimura
提出了一种主动自由空间光纤(FSO)通信系统的跟踪控制方法，使移动终端能够在近距离覆盖的用户网络区域中被跟踪。有源FSO系统由成对的终端组成，包括带有激光二极管(LD)的发射器和带有光电探测器(PD)的接收器。每个端子包含控制从LD发射的激光束的路径的机构，以使其与PD的光轴对准，而不管端子之间的位置变化。这为系统提供了在具有用于控制信号传输的较低比特率的传统无线网络上的高速和无处不在的光通信能力。轴对中控制需要终端之间的相对位置和方向，利用扩展卡尔曼滤波方法可以在线估计这些位置和方向。利用主动ESO系统的样机对跟踪控制方法的性能进行了实验验证
This paper proposes a tracking control method for an active free space optics (FSO) telecommunication system that enables a mobile terminal to be tracked in user network areas with short-range coverage. The active FSO system consists of paired terminals comprising a transmitter with a laser diode (LD) and a receiver with a photo detector (PD). Each terminal incorporates a mechanism that controls the path of the laser beam emitted from the LD so as to align it with the optical axis of the PD regardless of positional changes between the terminals. This provides the system with a high-speed and ubiquitous optical communication capability over a conventional wireless network with a lower bit rate for control signal transmission. The axis alignment control requires the relative position and orientation between the terminals, which can be estimated online with the proposed method by using an extended Kalman filter. The performance of the tracking control method is confirmed experimentally using a prototype of the active ESO system