在IMDD系统中使用几何形状成型的delta-sigma调制来提高16384QAM的性能
Optics letters
|October 13, 2023
概括
一种新的几何造型方法优化了使用delta-sigma调制的超高阶16384次方格幅度调制 (16384QAM) 星座. 这种技术提高了接收器的灵敏度和光通信系统的错误性能.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 数字调制数字调制
背景情况:
- 超高阶调制格式,如16384次方格幅度调制 (16384QAM),对于提高光通信系统的数据速率至关重要.
- 星座造型是通过优化信号噪声比来提高高阶调制方案性能的一个关键技术.
- 德尔塔-西格玛调制提供了独特的特性,可以用于先进的星座设计.
研究的目的:
- 为16384QAM星座提出一种新的几何塑造方法.
- 为了优化星座,提高星座收益和系统性能.
- 在强度调节的直接检测系统中实验验证拟议的方法.
主要方法:
- 为16384QAM星座开发一种新的几何造型算法.
- 将delta-sigma调制原理集成到星座设计中.
- 使用25公里单模光纤传输在强度调制直接检测 (IMDD) 系统中的实验演示.
主要成果:
- 提出的几何造型方法成功优化了16384QAM星座.
- 实验结果显示,对于超高阶QAM系统,接收器灵敏度的提高约为0.5dB.
- 在经过证明的IMDD系统中观察到增强的错误性能限制.
结论:
- 新的基于三角-西格玛调制的几何成型方法有效地提高了超高阶QAM系统的性能.
- 该技术在接收器灵敏度和错误性能方面提供了显著的改进,有利于未来的光通信网络.
- 这种方法为IMDD系统中优化高级调制格式提供了一种实用方法.
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