为非视线光到摄像机通信实现多路访问
Enabling Multiple Access for Non-Line-of-Sight Light-to-Camera Communications
摘要：
光到摄像机通信（LCC）已经作为一种新的无线通信技术出现，其具有极大的潜力以使广泛的应用受益。然而，现有的LCC系统要么需要摄像机直接面对灯光，要么只能通过单个链路进行通信，导致吞吐量低，并且容易受到环境光源干扰。我们提出了HYCACO，一种新的LCC系统，它使多个发光二极管（LED）与一个不变的相机通过非视线（NLoS）的链接进行通信。与其他NLoS LCC系统不同的是，所提出的方案对复杂的室内光环境具有弹性。HYCACO可以通过探索从多个LED传输的混合反射光信号来解码信息。通过进一步利用卷帘快门机制，我们提出了最佳的光学频率和相机曝光时间的选择策略，以实现最佳的性能。我们建立了一个硬件原型，以证明所提出的方案在不同的应用场景下的效率。实验结果表明，在iPhone 6s上，采用三个发射机，系统吞吐量达到4.5kbps。由于HYCACO具有鲁棒性、提高的系统吞吐量和易用性，因此在广告、标记对象和设备认证等广泛的应用中具有很大的潜力。
英文摘要：
Light-to-Camera Communications (LCC) have emerged as a new wireless communication technology with great potential to benefit a broad range of applications. However, the existing LCC systems either require cameras directly facing to the lights or can only communicate over a single link, resulting in low throughputs and being fragile to ambient illuminant interference. We present HYCACO, a novel LCC system, which enables multiple light emitting diodes (LEDs) with an unaltered camera to communicate via the non-line-of-sight (NLoS) links. Different from other NLoS LCC systems, the proposed scheme is resilient to the complex indoor luminous environment. HYCACO can decode the messages by exploring the mixed reflected optical signals transmitted from multiple LEDs. By further exploiting the rolling shutter mechanism, we present the optimal optical frequencies and camera exposure duration selection strategy to achieve the best performance. We built a hardware prototype to demonstrate the efficiency of the proposed scheme under different application scenarios. The experimental results show that the system throughput reaches 4.5 kbps on iPhone 6s with three transmitters. With the robustness, improved system throughput and ease of use, HYCACO has great potentials to be used in a wide range of applications such as advertising, tagging objects, and device certifications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
