Pub Date : 2023-07-20DOI: 10.24425/opelre.2022.144260
M. Aly, Mohamed Abaza
Various intelligent transportation systems are proposed in different forms of wireless communication technologies. Recently, the importance of visible light communication and free-space optics has been demonstrated in accomplishing vehicle-to-vehicle and infrastructure-to-vehicle communication systems, due to power efficiency, free licenses, and safety for human health. In this paper, a new hybrid relay system supported by free-space optics/visible light communication with two scenarios is proposed. The first one is that the data are transferred from the source to the relay through a free-space optics communication link and are then directed to the destination through a visible light communication link. The second scenario is that the data are transmitted from the source to the destination passing through two different relays to ensure larger coverage. A 10 − 6 bit error rate is achieved at a distance of 900 m for the first scenario with a remarkable signal-to-noise ratio of ~ 25.5 dB, while the largest distance that can be covered by the second scenario is 1200 m with a signal-to-noise ratio of ~ 30 dB
各种智能交通系统都采用了不同形式的无线通信技术。最近，可见光通信和自由空间光学在实现车对车和基础设施对车通信系统中的重要性已经得到证明，这是由于功率效率、自由许可证和对人类健康的安全性。本文提出了一种新的自由空间光学/可见光通信混合中继系统。第一个是数据通过自由空间光学通信链路从源传输到中继，然后通过可见光通信链路定向到目的地。第二种情况是数据通过两个不同的中继从源传输到目标，以确保更大的覆盖范围。第一种方案可在900 m距离内实现10 ~ 6比特的误码率，信噪比达到~ 25.5 dB;第二种方案可覆盖的最大距离为1200 m，信噪比达到~ 30 dB
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Pub Date : 2023-05-15DOI: 10.24425/opelre.2023.145940
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