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计算机工程 ›› 2018, Vol. 44 ›› Issue (7): 103-108. doi: 10.19678/j.issn.1000-3428.0050105

• 移动互联与通信技术 • 上一篇    下一篇

稀疏码分多址系统中基于能效最优的功率分配算法

潘燚,来阳,朱弘强   

  1. 中国电子科技集团公司第三十二研究所,上海 201808
  • 收稿日期:2018-01-15 出版日期:2018-07-15 发布日期:2018-07-15
  • 作者简介:潘燚(1980—),男,工程师,主研方向为便携式计算机集成架构、抗恶劣环境能力及设备故障诊断;来阳,工程师;朱弘强,高级工程师。
  • 基金资助:

    国家部委基金。

Power Allocation Algorithm Based on Optimal Energy Efficiency in Sparse Code Multiple Access Systems

PAN Yi,LAI Yang,ZHU Hongqiang   

  1. The 32nd Research Institute of China Electronics Technology Group Corporation,Shanghai 201808,China
  • Received:2018-01-15 Online:2018-07-15 Published:2018-07-15

摘要:

对稀疏码分多址(SCMA)系统中基于能效最优的功率分配问题进行研究,分别以最大化系统总能效和最差链路用户能效为优化目标,提出2种功率分配算法。将分数目标优化函数形式转化为含有参量的凹函数形式,并利用KKT条件求解得到能效最优的用户功率分配结果。仿真结 果表明,2种功率分配算法分别解决了给定模型下系统所有用户和最差链路用户的能效优化问题,均具有较好的收敛性,且2种能效优化算法的对比结果验证了能效最优不能保证传输速率最优。

关键词: 第五代移动通信技术, 稀疏码分多址, 能效, 消息传递算法, 功率分配

Abstract:

The power allocation problem based on optimal energy efficiency in Sparse Code Multiple Access(SCMA) systems is studied.Two power allocation algorithms are proposed to maximize the total energy efficiency and the worst link user energy efficiency respectively.By turning the fractional objective function into a concave function containing parameters,the optimal power allocation result is obtained according to the Karush-Kuhn-Tucker(KKT) condition.Simulation results show that,the proposed two optimal power allocation algorithms solve the energy efficiency optimization problem of all users and the worst link user under given models, and they are able to quickly get convergent,and the comparison of the two energy efficiency optimization algorithms shows that the optimal energy efficiency can not guarantee the optimal transmission rate.

Key words: 5G mobile communication technology, Sparse Code Multiple Access(SCMA), energy efficiency, Message Passing Algorithm(MPA), power allocation

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