Research on Resource Allocation Algorithm of Visible Light Communication DCO-OFDM System

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

doi:10.13756/j.gtxyj.2021.06.003

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Research on Resource Allocation Algorithm of Visible Light Communication DCO-OFDM System

- Research on Resource Allocation Algorithm of Visible Light Communication DCO-OFDM System
- Study on Optical Communications Issue 6, Pages: 19-22,44(2021)
- 作者机构：
  
  a.南京邮电大学　电子与光学工程，微电子学院，南京　210023
  b.南京邮电大学　通信与信息工程学院，南京　210023
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.06.003
  CLC： TN929.1
- Published：10 December 2021，
  
  Received：09 March 2021，
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HONG Wen-xin, LI Tian-yu, CHEN Jian-fei. Research on Resource Allocation Algorithm of Visible Light Communication DCO-OFDM System. [J]. Study on Optical Communications (6):19-22,44(2021)
DOI：

HONG Wen-xin, LI Tian-yu, CHEN Jian-fei. Research on Resource Allocation Algorithm of Visible Light Communication DCO-OFDM System. [J]. Study on Optical Communications (6):19-22,44(2021) DOI： 10.13756/j.gtxyj.2021.06.003.

摘要

针对室内可见光通信（VLC）直流偏置光正交频分复用（DCO-OFDM）系统存在的低信道利用率问题，文章对该系统的信道资源和比特资源进行了优化分配研究。首先介绍了DCO-OFDM系统的信号发射端模型和系统的信道利用率计算，并按照两步算法的思路依次分析了信道资源分配和比特资源分配问题，进而提出了自适应动态资源分配算法，该算法能够根据信道幅度频率响应来灵活分配子信道，并为各信道自适应选择满足服务质量要求的最高阶正交振幅调制（QAM）调制方式。仿真结果表明，相比于传统固定分配算法，该自适应资源分配算法可显著提升室内VLC DCO-OFDM系统的信道利用率。

Abstract

In view of the problem of low channel utilization in the Direct Current-biased Optical Orthogonal Frequency Division Multiplexing (DCO-OFDM) system for indoor Visible Light Communication (VLC)

the channel and bit resources of the system are optimally allocated. This paper first introduces the signal transmitter model of the DCO-OFDM system and the calculation of the channel utilization of the system. Then we analyze the problem of channel resource allocation and bit resource allocation in sequence according to the two-step algorithm. Finally

we propose an adaptive dynamic resource allocation algorithm. The algorithm can flexibly allocate sub-channels according to the channel amplitude and frequency response

and adaptively select the highest order Quadrature Amplitude Modulation (QAM) modulation method for each channel to meet service quality requirements. The results show that

compared with the traditional fixed allocation algorithm

this adaptive resource allocation algorithm can significantly improve the channel utilization of indoor VLC DCO-OFDM system.

关键词

室内可见光通信直流偏置光正交频分复用系统自适应动态资源分配算法信道利用率

Keywords

indoor VLCDCO-OFDM systemadaptive dynamic resource allocation algorithmchannel utilization

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