NDLI: Low complexity user scheduling algorithm for energy-efficient multiuser multiple-input multiple-output systems

Content Provider	IET Digital Library
Author	Sun, Chuiqiang Ge, Jianhua Li, Jing Zhu, Bin
Abstract	In downlink multiuser multiple-input multiple-output (MU-MIMO) systems, block diagonalisation (BD) is a well-known precoding technique that eliminates inter-user interference. The number of simultaneously supportable users with BD is limited by the number of base station transmit antennas and the number of user receive antennas. Traditional MU-MIMO scheduling algorithms focus on sum capacity. However, these user scheduling algorithms might not be optimal with respect to energy efficiency. Here, the authors consider the energy-efficient MU-MIMO scheduling that maximises the energy efficiency. The brute-force search for the optimal user set, however, is computationally prohibitive. Therefore they propose a low-complexity user scheduling algorithm for energy-efficient MU-MIMO systems. They first obtain an approximation expression for the energy efficiency by utilising the upper bound of the MU-MIMO system capacity. Then they show that the maximum energy efficiency can be achieved if the scheduling user set is selected to obtain the largest matrix volume. The numerical results show that the proposed algorithm achieves a good tradeoff between energy efficiency and computational complexity. They also consider the problem of maintaining fairness among users, and propose a simplified proportional fair (PF) scheduling algorithm.
Starting Page	343
Ending Page	350
Page Count	8
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 3, Feb (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2013.0328
Journal	IET Communications
Publisher Date	2014-01-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Approximation Expression Base Station Transmit Antenna Block Diagonalisation Brute-force Search Code Combinatorial Mathematics Communication Complexity Computational Complexity Downlink Multiuser Multiple-input Multiple-output System Electromagnetic Compatibility Energy Conservation Energy-efficient MU-MIMO Scheduling Algorithm Energy-efficient MU-MIMO System Energy-efficient Multiuser Multiple-input Multiple-output System Inter-user Interference Intercarrier Interference Interference Low-complexity User Scheduling Algorithm Matrix Volume Maximum Energy Efficiency MIMO Communication MU-MIMO System Capacity Optimal User Set PF Scheduling Algorithm Precoding Precoding Technique Proportional Fair Scheduling Algorithm Radio Link And Equipment Receiving Antenna Search Problem Single Antenna Sum Capacity Telecommunication Power Management Transmitting Antenna User Fairness Degree User Receive Antenna Wireless Communication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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