Proportional Fairness-Based Energy-Efficient Power Allocation in Downlink MIMO-NOMA Systems with Statistical CSI

被引：7
作者：
Yonghai Lin
Zhen Yang
Haiyan Guo
机构：
[1] KeyLaboratoryofMinistryofEducationinBroadbandWirelessCommunicationandSensorNetworkTechnology,NanjingUniversityofPostsandTelecommunications
来源：
中国通信 | 2019年 / 16卷 / 12期
关键词：
MIMO-NOMA; energy efficiency; proportional fairness; fractional programming method; golden section search;
D O I：
暂无
中图分类号：
TN929.5 [移动通信];
学科分类号：
080402 ; 080904 ; 0810 ; 081001 ;
摘要：
In this paper, proportional fairness(PF)-based energy-efficient power allocation is studied for multiple-input multiple-output(MIMO) non-orthogonal multiple access(NOMA) systems. In our schemes, statistical channel state information(CSI) is utilized for perfect CSI is impossible to achieve in practice. PF is used to balance the transmission efficiency and user fairness. Energy efficiency(EE) is formulated under basic data rate requirements and maximum transmitting power constraints. Due to the non-convex nature of EE, a two-step algorithm is proposed to obtain sub-optimal solution with a low complexity. Firstly, power allocation is determined by golden section search for fixed power. Secondly total transmitting power is determined by fractional programming method in the feasible regions. Compared to the performance of MIMO-NOMA without PF constraint, fairness is obtained at expense of decreasing of EE.
引用
收藏
页码：47 / 55
页数：9
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