Power allocation for massive MIMO: impact of power amplifier efficiency
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- 作者：Yingchu Guo ; Junlin Tang ; Gang Wu ; Shaoqian Li
- 关键词：5G ; massive MIMO ; energy efficiency ; green communication ; power amplifier efficiency ; 022301 ; 5G ; 大规模MIMO ; 能量效率 ; 绿色通信 ; 功率放大器效率
- 刊名：SCIENCE CHINA Information Sciences
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：59
- 期：2
- 页码：1-9
- 全文大小：323 KB
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Junlin Tang (1)
Gang Wu (1)
Shaoqian Li (1)
1. National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, 611731, China
Information Systems and Communication Service
文摘
With the rapid development of information technology, massive MIMO is becoming attractive for the fifth generation (5G) communication because of its outstanding performance in both spectral efficiency (SE) and energy efficiency (EE). Recently, many algorithms have been proposed to improve the EE while achieving high SE in massive MIMO systems. In previous work, the power amplifier (PA) efficiency is always considered as a constant. However, the PA efficiency changes with the output power in reality. In the practical situation, the simplification which treats the PA efficiency as a constant will not get the EE optimization based on our analysis. In this paper, we propose a more general EE model of massive MIMO systems considering PA efficiency as a variable, and investigate a power allocation algorithm based on zero-forcing (ZF) precoding so that we can guarantee the SE and EE at the same time. Simulation results show the trade-off between EE and SE, demonstrate the distinction with previous work, and imply that relatively higher transmit power will be more energy efficient. Keywords 5G massive MIMO energy efficiency green communication power amplifier efficiency