Multi-Dimensional Modulation Designing Based on Four-Dimensional Nonlinear Interference Model for Single-Span Optical Transmission System

LIANG Zhi-wei; CHEN Bin; LING Wei; LEI Yi

doi:10.12263/DZXB.20230087

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Multi-Dimensional Modulation Designing Based on Four-Dimensional Nonlinear Interference Model for Single-Span Optical Transmission System

PAPERS | 更新时间：2025-12-08

- Multi-Dimensional Modulation Designing Based on Four-Dimensional Nonlinear Interference Model for Single-Span Optical Transmission System
- ACTA ELECTRONICA SINICA Vol. 52, Issue 8, Pages: 2563-2570(2024)
- 作者机构：
  
  合肥工业大学计算机与信息学院，安徽合肥 230009
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62171175;62001151)
- DOI：10.12263/DZXB.20230087
  CLC： TN92;U285.49
- Received：01 February 2023，
  
  Revised：2023-05-30，
  
  Published：25 August 2024
- 稿件说明：
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梁志伟,陈斌,凌未,等. 基于四维非线性串扰模型的单跨无中继光传输多维调制设计[J]. 电子学报,2024,52(08):2563-2570.

LIANG Zhi-wei, CHEN Bin, LING Wei, et al. Multi-Dimensional Modulation Designing Based on Four-Dimensional Nonlinear Interference Model for Single-Span Optical Transmission System[J]. Acta Electronica Sinica, 2024, 52(08): 2563-2570.
梁志伟,陈斌,凌未,等. 基于四维非线性串扰模型的单跨无中继光传输多维调制设计[J]. 电子学报,2024,52(08):2563-2570. DOI：10.12263/DZXB.20230087

LIANG Zhi-wei, CHEN Bin, LING Wei, et al. Multi-Dimensional Modulation Designing Based on Four-Dimensional Nonlinear Interference Model for Single-Span Optical Transmission System[J]. Acta Electronica Sinica, 2024, 52(08): 2563-2570. DOI：10.12263/DZXB.20230087

摘要

随着光通信速率需求的不断提高，光纤中的非线性效应成为了限制信道容量增长的主要因素.针对该问题，本文基于四维（Four-Dimensional，4D）非线性串扰模型和几何整形，提出了抗非线性4D调制设计方法.通过在加性高斯白噪声信道（Additive White Gaussian Noise，AWGN）和单跨无中继光纤传输系统中的仿真，详细比较了四类不同调制格式（包括分别针对AWGN信道和光纤信道设计的2D和4D调制格式）的传输性能.数值仿真结果表明，基于4D非线性串扰模型和4D空间联合优化的调制格式不仅有较高的线性整形增益还具有较好的非线性容忍性.以5通道的波分复用传输系统为例，优化得到的NL-4D-1024调制与传统正交幅度调制（QAM）和2D整形调制相比，可以分别减少0.8 dB和0.4 dB的发射功率.

Abstract

With the increasing demand of optical communication data rate

the nonlinear effect in optical fiber has become the main factor limiting the growth of channel capacity. To solve this problem

this paper proposed a nonlinearity-tolerant geometrically-shaped (GS) four-dimensional (4D) modulation optimization method is proposed based on the 4D nonlinear interference (NLI) model. The transmission performance of four different modulation formats (including the 2D and 4D modulation formats designed for additive white Gaussian noise (AWGN) channel and optical fiber channel

respectively) are compared in detail via the simulation in the AWGN channel and single-span optical fiber transmission systems. The numerical results show that the constellation shaping based on the joint optimization of 4D NLI model and 4D space can not only achieve higher linear shaping gain but also provide better nonlinear tolerance. Taking the 5-channel wavelength division multiplexing transmission system as an example

the optimized NL-4D-1024 format can reduce the transmitted power by 0.8 dB and 0.4 dB compared with the traditional quadrature amplitude modulation (QAM) and 2D-GS modulation

respectively.

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references

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