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ESIM-OFDM-based transceiver design of a visible lightrncommunication system

机译:基于ESIM-OFDM的可见光通信系统收发器设计

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Visible light communication (VLC) system has been becoming a potential technology for short-range data communication over wireless optical channel. In this paper, a real-time state-of-the-art VLC system prototype is implemented mainly based on enhanced subcarrier index modulation orthogonal frequency division multiplexing (ESIM-OFDM) modulation scheme. The prototype has been designed using NI cDAQ hardware equipment programmed in MATLAB/LABVIEW. In other words, the developed VLC transceiver LABVIEW model is loaded into cDAQ to perform real-time transmission of text data. The design mainly comprises VLC transmitter, VLC receiver, interfacing NI cDAQ with LABVIEW, and implementation of ESIM-OFDM. It should be noted that the direct output of ESIM-OFDM is not suitable to drive VLC transmitter circuit; therefore, the key contribution lies in making use of sigma-delta modulator to modify ESIM-OFDM output to produce constant current signal which in turn could drive VLC transmitter. The second main contribution of the work targets the luminous properties of the designed transmitter that have experimentally been characterized using a LUX meter. Finally, the last contribution of the work is the simulation carried out to analyze the performance of the proposed system with other existing VLC modulation schemes. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译:可见光通信(VLC)系统已成为通过无线光信道进行短距离数据通信的潜在技术。本文主要基于增强型子载波索引调制正交频分复用(ESIM-OFDM)调制方案,实现了一种实时的VLC系统原型。该原型是使用在MATLAB / LABVIEW中编程的NI cDAQ硬件设备设计的。换句话说,将开发的VLC收发器LABVIEW模型加载到cDAQ中,以执行文本数据的实时传输。该设计主要包括VLC发送器,VLC接收器,NI cDAQ与LABVIEW的接口以及ESIM-OFDM的实现。需要说明的是,ESIM-OFDM的直接输出不适合驱动VLC发射机电路。因此,关键的贡献在于利用sigma-delta调制器来修改ESIM-OFDM输出以产生恒定电流信号,从而可以驱动VLC发射机。这项工作的第二个主要贡献是针对已设计发射器的发光特性,这些发射特性已通过LUX计进行了实验表征。最后,工作的最后贡献是进行仿真,以分析所提出系统与其他现有VLC调制方案的性能。版权所有(C)2016 John Wiley&Sons,Ltd.

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