线性预强调可以减轻发光二极管的非线性扭曲吗?
Optics letters
|May 1, 2024
概括
发射器预强调提高了可见光通信 (VLC) 中发光二极管 (LED) 的性能. 与接收器平衡不同,它有效地减轻了高电压下LED非线性扭曲,提供了显著的优势.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
背景情况:
- 可见光通信 (VLC) 使用发光二极管 (LED) 作为发射器.
- LED 的频率响应很差,限制了 VLC 系统的性能.
- 发射器预强调是一种提议的技术,用于增强LED频率响应.
研究的目的:
- 在VLC系统中,研究发射器预强调与接收器等效相比的有效性.
- 分析预强调对LED非线性扭曲的影响.
- 从理论和实验上解释发射器预强调的优点.
主要方法:
- 基于线性通道的通信理论进行理论分析.
- 实验验证发射器前强调和前送均衡器 (FFE) 的性能.
- 在低和高输入功率/调制电压下调查LED行为.
主要成果:
- 发射器的强调前性能相当于线性模式中的FFE (低输入功率).
- 在更高的调制电压下,预强调显示出与FFE相比的明显优势.
- 预强调有效地减轻了LED固有的非线性扭曲.
结论:
- 发射器预强调提供了一种优越的解决方案,可以提高VLC的性能,而不是传统的接收器等级.
- 预强调的非线性扭曲缓解能力是其关键优势,在这里首次解释了这一点.
- 预强调是改进基于LED的VLC系统的一个有价值的技术,特别是在非线性操作条件下.
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