光通信中几何成形的高阶调制技术研究  

Geometric Shaping of High-Order Modulation Techniques in Optical Communications

作　　者：李凯乐 余建国[1] 王雲 刘晓蕊 黄依波 LI Kaile;YU Jianguo;WANG Yun;LIU Xiaorui;HUANG Yibo(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《移动通信》2024年第5期89-93,共5页Mobile Communications

基　　金：国家自然科学基金国家重大科研仪器研制项目“光子矢量太赫兹信号源与分析仪”(62127802);国家自然科学基金创新研究群体项目“面向能效的多频无线系统”(61821001);国家科技重点专项“多模态网络与通信”“Tpbs太赫兹光纤一体融合通信系统与关键技术”(2023YFB2905600)。

摘　　要：从信息论诞生以来,如何减小系统容量和香农极限之间的差距一直是通信领域的一个焦点。几何成形技术作为一种典型的调制格式优化技术,在不引入任何冗余的情况下,通过把均匀分布发射功率相等的星座图设置为概率相等、间距不均匀的星座图,使得信号符合服从于目标信道的最佳分布,从而使系统传输速率更接近香农极限,从而提升系统的信道容量。回顾了近年来几何成形的高阶调制技术在光纤通信领域的发展历程,梳理了近年来几何成形技术在光纤通信领域的相关研究。最后,结合当前的研究现状,对未来几何成形的调制技术提出了研究方向和建议。Since the inception of information theory,reducing the gap between system capacity and the Shannon limit has been a focal point in the field of communications.Geometric shaping,a quintessential modulation format optimization technique,achieves this by configuring uniformly distributed,equal-power constellation diagrams into probabilistically equal but unequally spaced constellations.This adaptation allows the signal to conform to the optimal distribution for the intended channel,thus bringing the system transmission rate closer to the Shannon limit and enhancing channel capacity without introducing any redundancy.This paper reviews the recent advancements in high-order modulation techniques using geometric shaping within the realm of fiber optic communications.It summarizes the developments in geometric shaping techniques in this area over recent years.Finally,in light of the current research landscape,this paper proposes future directions and recommendations for research in modulation techniques using geometric shaping.

关 键 词：光通信 高阶调制技术 几何成形 

分 类 号：TN911[电子电信—通信与信息系统]