计算机科学

计算机科学 ›› 2021, Vol. 48 ›› Issue (6A): 398-403.doi: 10.11896/jsjkx.200900175

• 网络&通信 • 上一篇    下一篇

基于多天线NOMA的通信系统高能效功率分配方法

陈勇1, 许奇1, 王小明2, 高金玉2, 申瑞娟2   

  1. 1 国网江苏省电力工程咨询有限公司 南京210024
    2 南京邮电大学通信与信息工程学院 南京210003
  • 出版日期:2021-06-10 发布日期:2021-06-17
  • 通讯作者: 王小明(xmwang@njupt.edu.cn)
  • 作者简介:xmwang@njupt.edu.cn
  • 基金资助:
    国网江苏省电力工程咨询有限公司自主立项科技项目(SGJSHY00XMJS2000450);国家自然科学基金(6181240)

Energy Efficient Power Allocation for MIMO-NOMA Communication Systems

CHEN Yong1, XU Qi1, WANG Xiao-ming2, GAO Jin-yu2, SHEN Rui-juan2   

  1. 1 State Grid Jiangsu Electric Power Engineering Co.,Ltd.,Nanjing 210024,China
    2 College of Telecommunication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
  • Online:2021-06-10 Published:2021-06-17
  • About author:CHEN Yong,born in 1974,master,se-nior engineer. His main research interestsinclude electric power engineering and so on.
    WANG Xiao-ming,born in 1986,Ph.D,lecturer,master tutor.His main research interests include wireless communication,deep learning and Internet of Things.
  • Supported by:
    Science and Technology Project of State Grid Jiangsu Electric Power Engineering Co.,Ltd.(SGJSHY00XMJS2000450) and National Natural Science Foundation of China(6181240).

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摘要： 文中提出一种基于多天线非正交多址接入的通信系统高能效功率分配方法。在该方法中,基站采用非正交的方式接入用户,将用户分为多个簇,利用迫零接收方法处理簇间的用户干扰,同时采用串行干扰消除方法处理簇内的用户信号。为了提升该系统的能量效率性能,对基站发射功率的分配方案进行了优化。文中建模该功率分配问题为一个分数形式的非凸优化问题,该问题很难直接求解。首先,引入辅助变量将原目标函数转换成为非分数的形式,并采用二分法对辅助变量进行搜索。然后,由于转换后的优化问题仍是一个非凸问题,文中通过二次转换和迭代处理对问题进行了求解。理论分析和仿真结果表明,与传统的正交接入方法相比,所提出的方法可以有效提升通信系统能量效率性能,同时还可以改善系统的数据率性能。另外,该方法通过调节用权重因子,可以保证用户间的公平性。

关键词: 多天线, 非正交多址接入, 功率分配, 能量效率, 通信系统

Abstract: In this paper,a power allocation algorithm is proposed for non-orthogonal multiple access (NOMA) communication systems with multiple input multiple output (MIMO).The base station (BS) divides the connected users into several clusters,and deals with the inter-cluster interference by zero-forcing receiving method and the intra-cluster interference by successive interference cancellation method.To improve the energy efficiency performance of the MIMO-NOMA system,the transmit power allocation is optimized at the BS.We formulate the power allocation problem as a nonconvex optimization problem with a fractio-nal form,which is difficult to solve directly.First,an auxiliary variable is introduced to transform the original objective function into a non-fractional form,and it is searched by the bisection method.Since the optimization problem after transformation is still a non-convex problem,it is then solved by a quadratic transformation and an iterative processing.The theoretical analysis and simulation results show that the proposed method can effectively improve the energy efficiency and sum-rate performance of the communication system compared with the traditional orthogonal access method.In addition,the proposed method can ensure the fairness between users by adjusting the weight factor.

Key words: Communication systems, Energy efficiency, Multiple input multiple output, Non-orthogonal multiple access, Power allocation

中图分类号: 

  • TN929
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