Research on IGA-SLM Algorithm for Reducing PAPR in DCO-OFDM System

LI Tian-yu; LI Wei-ze; HONG Wen-xin; CHEN Jian-fei

doi:10.13756/j.gtxyj.2020.04.004

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Research on IGA-SLM Algorithm for Reducing PAPR in DCO-OFDM System

- Research on IGA-SLM Algorithm for Reducing PAPR in DCO-OFDM System
- Study on Optical communication Issue 4, Pages: 17-19(2020)
- 作者机构：
  
  1. 南京邮电大学通信与信息工程学院
  2. 南京邮电大学电子与光学工程微电子学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2020.04.004
  CLC： TP18;TN929.53
- Published：2020，
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[1]李天屿,李蔚泽,洪文昕,陈建飞.降低DCO-OFDM系统峰均功率比的IGA-SLM算法[J].光通信研究,2020(04):17-19+78.

LI Tian-yu, LI Wei-ze, HONG Wen-xin, et al. Research on IGA-SLM Algorithm for Reducing PAPR in DCO-OFDM System. [J]. (4):17-19(2020)
[1]李天屿,李蔚泽,洪文昕,陈建飞.降低DCO-OFDM系统峰均功率比的IGA-SLM算法[J].光通信研究,2020(04):17-19+78. DOI： 10.13756/j.gtxyj.2020.04.004.

LI Tian-yu, LI Wei-ze, HONG Wen-xin, et al. Research on IGA-SLM Algorithm for Reducing PAPR in DCO-OFDM System. [J]. (4):17-19(2020) DOI： 10.13756/j.gtxyj.2020.04.004.

摘要

针对可见光通信中直流偏置光-正交频分复用（DCO-OFDM）系统存在的高峰均功率比（PAPR）问题

可采用选择性映射算法来降低系统的PAPR。由于选择性映射算法只能在有限组相位旋转序列里选择局部最优

因此引入遗传算法来搜索全局最优解

同时针对遗传算法容易产生过早收敛的问题

文章提出自适应调整机制、自适应多点交叉机制、最优解保护机制和立即淘汰机制来改进遗传算法

进而提出改进型遗传选择性映射算法（IGA-SLM）。仿真结果表明

该算法可显著降低可见光通信DCO-OFDM系统的PAPR。

Abstract

To solve the problem of high Peak to Average Power Ratio（PAPR） in Direct Current biased Optical-Orthogonal Frequency Division Multiplexing（DCO-OFDM） system in visible light communication

the selective mapping method can be used to reduce the PAPR of the system. Because the selective mapping algorithm can only select the local optimum in a limited set of phase rotation sequences

the genetic algorithm is introduced to search for the global optimum solution. Meanwhile

the genetic algorithm has the problem of premature convergence. In order to solve this issue

we apply several methods including the adaptive adjustment mechanism

the adaptive multi-point crossover mechanism

the optimal solution protection mechanism and the immediate elimination mechanism to improve the genetic algorithm. Therefore

an Improved Genetic Algorithm-Selected Mapping（IGA-SLM） is proposed. The simulation results show that the proposed algorithm can significantly reduce the PAPR of DCO-OFDM system.

关键词

可见光通信直流偏置光-正交频分复用系统峰均功率比改进型遗传选择性映射算法

Keywords

visible light communicationDCO-OFDM systempeak-to-average power ratioIGA-SLM

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