摘要
能量效率是判断大规模多输入多输出(MIMO)技术是否符合绿色通信的重要指标之一。文中建立一种电路功耗模型,分析了多用户MIMO通信系统的能量效率问题。首先,建立多用户MIMO通信系统的下行链路传输模型和以发射功耗和电路功耗为主的功耗模型;其次,根据提出的系统模型得出系统能效的关系式;最后,提出一种改进的注水功率分配算法,以实现系统能量效率的最大化。仿真结果表明,在多用户MIMO通信系统中,系统总功耗会随着基站天线数目和小区内用户数目的增加而增加,而系统的能量效率并不会随着吞吐量无限增加,而是先递增达到最大值后下降。
Energy efficiency is one of the important indicators to judge whether the massive multiple input multiple output(MIMO)technology conforms to green communication.In this paper,a circuit power consumption model is established to analyze the energy efficiency of multi-user MIMO communication system.Firstly,the downlink transmission model and the power consumption model based on transmission power and circuit power consumption are established.Secondly,the relational expression of system energy efficiency is obtained by means of the system model proposed in this paper.An improved waterfilling power allocation algorithm is proposed to maximize the energy efficiency of the system.The simulation results show that the total power consumption of the multi-user MIMO communication system increases with the increase of antennas in the base station and the users in the cell,and the energy efficiency of the system does not increase infinitely with increase of throughput,but increases first to the maximum and then decreases.
作者
张瑞清
李晖
宋选安
王天赐
ZHANG Ruiqing;LI Hui;SONG Xuanan;WANG Tianci(School of Information Science and Technology,Hainan University,Haikou 570228,China;Engineering Research Center of Marine Communication and Networks in Hainan Province,Haikou 570228,China;Hainan Nuclear Power Co.,Ltd.,Changjiang 572733,China)
出处
《现代电子技术》
北大核心
2020年第7期1-5,共5页
Modern Electronics Technique
基金
国家自然科学基金资助项目(61661018)
海南省重点研发计划项目(ZDYF2018012)。
关键词
能效优化
多输入多输出
传输模型
功耗
能效分析
功率分配
energy efficiency optimization
MIMO
transmission model
power consumption
energy efficiency analysis
power allocation