有限字符输入DCO-OFDMA系统的资源分配算法研究

李世银; 鲁姗妹; 马帅; 张凡; 徐子涵; 王洪梅; 李宗艳; 熊海良

doi:10.12236/DZXB.20210277

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有限字符输入DCO-OFDMA系统的资源分配算法研究

更新时间：2022-03-08

- 有限字符输入DCO-OFDMA系统的资源分配算法研究
- Research on Resource Allocation Algorithm of DCO-OFDMA System with Finite-Alphabet Inputs
- 电子学报 2022年页码：1-11
- 作者机构：
  
  1.中国矿业大学信息与控制工程学院,江苏徐州 221116
  2.地下空间智能控制教育部工程研究中心,江苏徐州 221116
  3.东南大学移动通信国家重点实验室,江苏南京 210096
  4.西安邮电大学陕西省信息通信网络及安全重点实验室,陕西西安 710121
  5.展讯通信有限公司通信算法技术资源部,上海 201203
  6.山东大学信息科学与工程学院,山东济南 250100
- 作者简介：
  
  [ "李世银男，1971年生，四川犍为人. 现为中国矿业大学信息与控制工程学院教授、博士生导师.主要方向为煤矿信息化和移动目标定位.E-mail:lishiyin@cumt.edu.cn" ]
  [ "鲁姗妹女，1995年生，江苏徐州人.现为中国矿业大学信息与控制工程学院研究生.主要方向为无线通信和可见光通信.E-mail:lushanmei@cumt.edu.cn" ]
  [ "马帅（通信作者）男，1986年生，山东日照人.现为中国矿业大学信息与控制工程学院副教授.主要方向为无线通信和可见光通信.E-mail:mashuai001@cumt.edu.cn" ]
  [ "张凡女，1996年生，山东日照人.现为中国矿业大学信息与控制工程学院研究生.主要方向为无线通信和可见光通信.E-mail:zhangfan@cumt.edu.cn" ]
  [ "徐子涵女，1996年生，山东济南人.现为展讯通信（上海）有限公司通信算法技术资源部人员.主要方向为无线通信和可见光通信.E-mail:xuzihan@cumt.edu.cn" ]
  [ "王洪梅女，1983年生，山东诸城人. 现为中国矿业大学信息与控制工程学院副教授.主要方向为无线通信.E-mail:whm99@cumt.edu.cn" ]
  [ "李宗艳女，1982年生，山东临沂人. 现为中国矿业大学信息与控制工程学院讲师.主要方向为无线通信和光通信的编码调制技术.E-mail:lizongyan@cumt.edu.cn" ]
  [ "熊海良男，1981年生，湖南双峰人.现为山东大学信息科学与工程学院副教授.主要方向为智能感知、智能决策和深度学习.E-mail:hailiangxiong@gmail.com" ]
- 基金信息：
  
  国家自然科学基金(61771474);山东省重大科技创新工程项目(2019JZZY020505);东南大学移动通信国家重点实验室开放研究基金资助课题(2021D02);信息光子学与光通信国家重点实验室开放基金(IPOC）(BUPT);山东省自然科学基金面上项目(ZR2019MF038)
- DOI：10.12236/DZXB.20210277
  中图分类号： TN929
- 收稿：2021-02-25，
  
  修回：2021-08-19，
  
  网络出版：2022-03-08，
- 稿件说明：
移动端阅览
李世银, 鲁姗妹, 马帅, 等. 有限字符输入DCO-OFDMA系统的资源分配算法研究[J/OL]. 电子学报, 2022,1-11.

Shi-yin LI, Shan-mei LU, Shuai MA, et al. Research on Resource Allocation Algorithm of DCO-OFDMA System with Finite-Alphabet Inputs[J/OL]. ACTA ELECTRONICA SINICA, 2022, 1-11.
李世银, 鲁姗妹, 马帅, 等. 有限字符输入DCO-OFDMA系统的资源分配算法研究[J/OL]. 电子学报, 2022,1-11. DOI： 10.12236/DZXB.20210277.

Shi-yin LI, Shan-mei LU, Shuai MA, et al. Research on Resource Allocation Algorithm of DCO-OFDMA System with Finite-Alphabet Inputs[J/OL]. ACTA ELECTRONICA SINICA, 2022, 1-11. DOI： 10.12236/DZXB.20210277.

摘要

至今，有限字符输入可见光通信(Visible Light Communication

VLC)直流偏置光正交频分多址接入(Direct Current Biased Optical Orthogonal Frequency Division Multiplexing Access

DCO-OFDMA)系统的用户信息传输速率极限仍然未知. 本文首次推导了有限字符输入DCO-OFDMA系统的用户准确可达速率及其下界，并研究了满足用户速率门限要求的总传输电功率最小化问题. 由于原始优化问题为优化变量为子载波分配、功率分配及直流偏置的最小化总传输电功率的联合优化问题，复杂度高难以求解，本文通过推导最优直流偏置及固定子载波分配方式将原始问题简化为优化变量为功率分配的最小化总信息传输功率的单变量优化问题，并利用拉格朗日函数、Karush- Kuhn- Tucker(KKT)条件，提出了满足用户速率门限要求的最小化总信息传输功率的功率分配方案. 仿真结果表明，本文提出的功率分配方案依赖于子载波之间的信道增益差异和用户速率门限，且在低速率门限与高速率门限时效果均明显优于等功率分配方案，并且在高速率门限时效果明显优于传统注水功率分配方案.

Abstract

So far

the limit of user information transmission rate of direct current biased optical orthogonal frequency division multiplexing access (DCO-OFDMA) for visible light communication (VLC) system with finite-alphabet inputs is yet unknown. In this paper

the user accurate achievable rate and its lower bound of the DCO-OFDMA system with finite-alphabet inputs are derived for the first time

and the total electrical transmission power minimization problem under user rate threshold constraints is studied. Since the original optimization problem is a joint optimization problem of minimizing the total electrical transmission power with the optimization variables of subcarrier allocation

power allocation and DC-bias

which is with high complexity and difficult to solve

by deriving the optimal DC-bias and fixed subcarrier allocation

the original problem is simplified into a single variable optimization problem

which is

minimizing the total information transmission power with power allocation as the optimization variable. Moreover

by using the Lagrangian function and Karush-Kuhn-Tucker (KKT) conditions

we propose a power allocation scheme to minimize the total information transmission power with user rate threshold constraints. Numerical results show that the power allocation scheme proposed in this paper depends on the channel gain difference between subcarriers and the user rate threshold

and its performance is significantly better than the equal power allocation scheme at the low rate threshold and the high rate threshold，moreover，its performance is significantly better than the traditional Water-filling power allocation scheme at the high rate threshold.

关键词

Keywords

references

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