Genetic Algorithm Based MIMO Equalization Parameter Optimization Technology for Mode-Division Multiplexed System

ZHAO Tian-feng; WEN Feng; FENG Bian-xia; WU Bao-jian; XU Bo; QIU Kun

doi:10.12263/DZXB.20230241

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Genetic Algorithm Based MIMO Equalization Parameter Optimization Technology for Mode-Division Multiplexed System

PAPERS | 更新时间：2025-12-11

- Genetic Algorithm Based MIMO Equalization Parameter Optimization Technology for Mode-Division Multiplexed System
- ACTA ELECTRONICA SINICA Vol. 52, Issue 5, Pages: 1601-1608(2024)
- 作者机构：
  
  电子科技大学信息与通信工程学院光纤传感与通信教育部重点实验室，四川成都 611731
- 作者简介：
- 基金信息：
  
  National Key R&D Program of China(2018YFB1801001)
- DOI：10.12263/DZXB.20230241
  CLC： TN913.7;
- Received：14 March 2023，
  
  Revised：2023-10-18，
  
  Published：25 May 2024
- 稿件说明：
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赵天烽,文峰,冯变霞,等.面向模分复用系统的遗传-MIMO均衡参数优化技术[J].电子学报,2024,52(05):1601-1608.

ZHAO Tian-feng, WEN Feng, FENG Bian-xia, et al.Genetic Algorithm Based MIMO Equalization Parameter Optimization Technology for Mode-Division Multiplexed System[J].Acta Electronica Sinica, 2024, 52(05): 1601-1608.
赵天烽,文峰,冯变霞,等.面向模分复用系统的遗传-MIMO均衡参数优化技术[J].电子学报,2024,52(05):1601-1608. DOI：10.12263/DZXB.20230241

ZHAO Tian-feng, WEN Feng, FENG Bian-xia, et al.Genetic Algorithm Based MIMO Equalization Parameter Optimization Technology for Mode-Division Multiplexed System[J].Acta Electronica Sinica, 2024, 52(05): 1601-1608. DOI：10.12263/DZXB.20230241

摘要

在模分复用系统的数字信号处理单元中，多输入多输出（Multi-Input Multi-Output，MIMO）均衡技术可用来补偿由各类模式相关噪声引起的信号误码率（Bit Error Rate，BER）劣化问题.而MIMO均衡算法的工作性能严重依赖于步长因子

以及抽头数

，因此在固化均衡器之前，确定MIMO均衡算法中

参数组合的最优值至关重要.为提高参数优化效率，提出了一种基于遗传算法（Genetic Algorithm，GA）的MIMO均衡参数优化方案，即遗传-MIMO（GA-MIMO），在保证最小BER输出的同时降低参数优化过程所需的计算开销.为验证GA-MIMO的工作性能，构建了基于10 km六模光纤的点对点通信实验系统，使用新方案补偿并行通信的六路数据，并与最速下降法和迭代算法进行性能比较.实验结果表明，所提GA方案可实现MIMO均衡中最高99.98%的最优

参数命中率，且GA-MIMO算法的全局搜索性使其相比于最速下降法和迭代算法可最多分别节省86.14%和90.3%的均衡算法调用次数，有效降低了确定最优

参数组合时的计算开销.

Abstract

In the digital signal processing unit of the mode-division multiplexed system

the multi-input and multi-output (MIMO) equalization technology is usually used to compensate for the signal bit error rate (BER) degradation disturbed by various mode-dependent noises.The performance of MIMO equalization algorithm depends heavily on the step size factor

and the number of taps

so before welding the equalizers

it’s important to determine the optimal value of

combination in MIMO equalization algorithm.A genetic algorithm (GA) based MIMO equalization parameter optimization scheme

namely GA-MIMO

is proposed to improve the efficiency of the parameter optimization

which is used to reduce the computational costs required during parameter optimization with the minimum BER output.In order to verify the performance of GA-MIMO

a point-to-point communication experimental system based on 10 km six-mode fiber is constructed.The new scheme i

s used to compensate the parallelly transmitted six-channel data

and the performance is compared with the steepest descent method and iterative algorithm.The experimental results show that the proposed GA scheme achieves the hit rate of the optimal

parameters in MIMO equalization up to 99.98%

and the global search function of GA algorithm helps save the number of calls to the equalization algorithm of 86.14% and 90.3% compared with the steepest descent algorithm and iterative algorithm

respectively

effectively reducing the computational cost of locating

parameters.

关键词

Keywords

references

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长飞光纤公司产品中心 . 少模光纤产品详情 [EB/OL ] .( 2022-11-11 )[ 2023-10-15 ] . https://en.yofc.com/view/2351.html https://en.yofc.com/view/2351.html .

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