多小区下行NOMA系统中最大公平的功率分配方案

doi:10.13190/j.jbupt.2020-050

北京邮电大学学报 ›› 2020, Vol. 43 ›› Issue (5): 130-136.doi: 10.13190/j.jbupt.2020-050

多小区下行NOMA系统中最大公平的功率分配方案

田心记, 蒋清丽

河南理工大学物理与电子信息学院, 焦作 454000

收稿日期:2020-05-20 发布日期:2021-03-11
作者简介:田心记(1983-),女,副教授,E-mail:tian215216@sohu.com.
基金资助:
河南省科技攻关项目（172102210023）；河南省高等学校矿山信息化开放实验室开放基金项目（KY2015-01）；河南省高校基本科研业务费专项资金项目（NSFRF140126）

Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems

TIAN Xin-ji, JIANG Qing-li

School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Received:2020-05-20 Published:2021-03-11

摘要/Abstract

摘要： 对于多小区多簇且每个簇包含任意用户的下行非正交多址接入（NOMA）系统，提出了一种最大公平的功率分配方案.首先构建了最大公平的功率分配优化问题；推导了单簇内以最大公平为准则的分配功率时，该簇内每个用户的速率与每个簇的总功率之间的关系，并基于该结论，将优化问题中用户间的功率分配转化为簇间功率分配；最后给出了一种基于迭代的簇间功率分配算法，为每个簇平均分配功率并计算单簇内最大公平准则下用户的速率.通过多次调整最大速率所在小区簇的功率和最小速率所在小区簇的功率，得到该系统中最大公平的功率分配.仿真结果显示，所提方案的公平性优于相同场景中已有的功率分配方案.

关键词: 多小区, 非正交多址接入, 最大公平, 功率分配

Abstract: A power allocation scheme to maximize fairness is proposed for multi-cell downlink non-orthogonal multiple access (NOMA) systems with multi-cluster multi-user. Firstly, the power allocation optimization problem for maximizing fairness is constructed. Then, the relationship between the total power of a signal cluster and the users‘ rate in the cluster is derived under the criterion of maximum fairness, and based on this conclusion, the power allocation among users in the optimization problem is transformed into that among clusters. Finally, an inter cluster power allocation algorithm based on iterative is presented. This algorithm calculates the user's rate under the maximum fairness criterion by assigning average power for each cluster, and obtains the optimal powers by adjusting the cluster power of the cell with the maximum rate and the cluster power of the cell with the minimum rate. Simulations show that the proposed scheme outperform the existing schemes in terms of fairness.

Key words: multi-cells, non-orthogonal multiple access, maximum fairness, power allocation

中图分类号:

TN911.22

田心记, 蒋清丽. 多小区下行NOMA系统中最大公平的功率分配方案[J]. 北京邮电大学学报, 2020, 43(5): 130-136.

TIAN Xin-ji, JIANG Qing-li. Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems[J]. Journal of Beijing University of Posts and Telecommunications, 2020, 43(5): 130-136.

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多小区下行NOMA系统中最大公平的功率分配方案

Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems

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