Matus Vicente, Guerra Victor, Zvanovec Stanislav, Rabadan Jose, Perez-Jimenez Rafael
Appl Opt. 2021 Jan 1;60(1):75-82. doi: 10.1364/AO.405952.
Sandstorms can severely affect the reliability of outdoor optical wireless communications (OWC) by diminishing large regions' visibility. In this work, the effect of a real sandstorm on optical camera communications (OCC) links is experimentally evaluated. Two link ranges are essayed using a cost-efficient telescope-based camera setup with commercial LEDs. Using on-off keying modulation, a data rate of 1035 and 630 bps with error probabilities of 9.14⋅10 and 4.1⋅10 for 100 m and 200 m, respectively, can be achieved. The signal-to-noise ratio of the links was optimized by tuning the analog amplifier's gain of the camera, increasing it by up to 9 dB. It is shown that scattering due to the sandstorm can even be beneficial for increasing the data rate in OCC (contrary to classical photodetector-based OWC links), thanks to an increment of 33% on the region of interest dimensions compared to the expected clear air link.
沙尘暴会通过降低大片区域的能见度，严重影响户外光无线通信（OWC）的可靠性。在这项工作中，对真实沙尘暴对光相机通信（OCC）链路的影响进行了实验评估。使用基于望远镜的经济高效相机设置和商用发光二极管（LED），测试了两个链路范围。采用开关键控调制，在100米和200米的距离上，分别可以实现1035和630比特每秒的数据速率，误码率分别为9.14×10和4.1×10。通过调整相机的模拟放大器增益，将链路的信噪比进行了优化，增益提高了9分贝。结果表明，与基于传统光电探测器的OWC链路不同，沙尘暴引起的散射甚至有助于提高OCC中的数据速率，这是因为与预期的晴空链路相比，感兴趣区域的尺寸增加了33%。
