基于脉冲宽度和脉冲位置混合调制的RGB LED阵列三维空间编码同步数据传输和亮度控制

J. L. Henao, N. Guerrero González, J. García-Álvarez
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引用次数: 1

摘要

提出了一种用于RGB led阵列可见光通信(VLC)系统中同时控制照明和数据传输的三维空间编码方案。所提出和实验测试的编码是基于混合多脉冲位置调制(M-PPM)的数据编码,其中脉冲(插槽)的数量控制传递到LED的电流的大小,如脉冲宽度调制(PWM)。所实现的VLC系统符合室内照明和数据传输的双重功能,并针对数据传输速度与照明水平变化之间的相互依赖问题提出了另一种解决方案。本文论证了采用低成本元件和数字解调实现该方案的可行性。在距离德州仪器公司OPT101光电探测器0.9米的地方,用两个10W的RGB LED获得了6 Kbps的恒定传输速度,照明范围为光源LED可能光功率的25% ~ 85%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Three-Dimensional Spatial Coding Based on Hybrid Pulse Width and Pulse Position Modulation for Simultaneous Data Transmission and Brightness Control on RGB LED Arrays
A three dimensional (3D) spatial coding scheme is proposed for simultaneous control of illumination and data transmission in a Visible Light Communication (VLC) system with RGB LEDs arrays . The proposed and experimentally tested coding is based on hybrid Multi-Pulse Position Modulation (M-PPM) for data encoding, in which the number of pulses (slots) control the amount of current delivered to the LED such as the Pulse Width Modulation (PWM). The implemented VLC system complies with the dual functionality, indoor lighting and data transmission, also proposes an alternative solution for the problem of the interdependence between the speed of data transmission and the variation of the levels of illumination. In this paper, the feasibility of implementing the proposed scheme using low cost elements and using digital demodulation is demonstrated. A constant transmission speed of 6 Kbps was obtained with two 10W RGB LEDs at 0.9 meters from the OPT101 photodetector of Texas Instruments, with a range of illumination ranging between 25% and 85% of the possible light power of the sources LED.
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