信道约束下基于可调光OPPM的VLC系统设计
Designing A Dimmable OPPM-Based VLC System Under Channel Constraints
摘要：
在本文中，我们设计了一个调光兼容的可见光通信（VLC）系统在一个标准的办公室根据照明标准下的信道约束。我们使用重叠脉冲位置调制（OPPM），以支持调光控制，通过改变代码的权重。系统参数，如一个有效的间隔调光连同根据信道延迟扩展的比特率的上限进行了研究。此外，考虑到色散VLC信道和使用蒙特卡罗（MC）模拟，提出了一种方法来确定在不同的调光水平，以实现有效的比特出错率（BER）的最小码长。最后，网格编码调制（TCM）被建议应用于OPPM，以利用随之而来的编码增益可以高达$3$ dB。
英文摘要：
In this paper, we design a dimming compatible visible light communication (VLC) system in a standard office room according to illumination standards under channel constraints. We use overlapping pulse position modulation (OPPM) to support dimming control by changing the code weights. The system parameters such as a valid interval for dimming together with an upper bound for bit rate according to the channel delay spread are investigated. Moreover, considering the dispersive VLC channel and using Monte Carlo (MC) simulations, a method is proposed to determine the minimum code length in different dimming levels in order to achieve a valid bit error rate (BER). Finally, trellis coded modulation (TCM) is suggested to be applied to OPPM in order to take advantage of consequent coding gain which could be up to $3$ dB.
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