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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Hierarchical scheme for detecting the rotating MIMO transmission of the in-door RGB-LED visible light wireless communications using mobile-phone camera
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Hierarchical scheme for detecting the rotating MIMO transmission of the in-door RGB-LED visible light wireless communications using mobile-phone camera

机译：使用手机摄像头检测室内RGB-LED可见光无线通信的旋转MIMO传输的分层方案

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摘要

Multiple-input and multiple-output (MIMO) scheme can extend the transmission capacity for the lightemitting-diode (LED) based visible light communication (VLC) systems. The MIMO VLC system that uses the mobile-phone camera as the optical receiver (Rx) to receive MIMO signal from the n x n Red-GreenBlue (RGB) LED array is desirable. The key step of decoding this signal is to detect the signal direction. If the LED transmitter (Tx) is rotated, the Rx may not realize the rotation and transmission error can occur. In this work, we propose and demonstrate a novel hierarchical transmission scheme which can reduce the computation complexity of rotation detection in LED array VLC system. We use the n x n RGB LED array as the MIMO Tx. In our study, a novel two dimensional Hadamard coding scheme is proposed. Using the different LED color layers to indicate the rotation, a low complexity rotation detection method can be used for improving the quality of received signal. The detection correction rate is above 95% in the indoor usage distance. Experimental results confirm the feasibility of the proposed scheme. (C) 2014 Elsevier B.V. All rights reserved
机译：多输入多输出（MIMO）方案可以扩展基于发光二极管（LED）的可见光通信（VLC）系统的传输容量。期望使用移动电话照相机作为光接收器（Rx）从n x n红绿蓝（RGB）LED阵列接收MIMO信号的MIMO VLC系统。解码此信号的关键步骤是检测信号方向。如果LED发射器（Tx）旋转，则Rx可能无法实现旋转，并且可能发生传输错误。在这项工作中，我们提出并演示了一种新颖的分层传输方案，该方案可以降低LED阵列VLC系统中旋转检测的计算复杂度。我们使用n x n RGB LED阵列作为MIMO Tx。在我们的研究中，提出了一种新颖的二维Hadamard编码方案。使用不同的LED颜色层指示旋转，可以使用低复杂度旋转检测方法来提高接收信号的质量。室内使用距离的检测校正率在95％以上。实验结果证实了该方案的可行性。 （C）2014 Elsevier B.V.保留所有权利

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