Paper Info
Title
Quantifying and Comparing Energy Efficiencies on SU-MIMO and MU-MIMO Downlinks
Abstract
This paper evaluates and compares the performance of single- user (SU) and multi-user (MU) transmission for downlink multiple-input multiple-output (MIMO) channels in terms of system energy efficiency (EE). We introduce power control algorithms to maximize EE. Specifically, to optimize the power allocation, we consider the problem of EE maximization with the satisfaction of the minimum spectral efficiency (SE) gain. Antenna selection is taken into account to further enhance the EE performance for both SU and MU systems. Our results reveal that we should turn off extra antennas at the transmitter, which are originally used for diversity gain but incur large circuit power consumption. Our comparisons between SU and MU differ from conventional comparisons, which focus on SE. Jointly considering EE and SE, we show that SU is more desirable when the transmit power is low, while MU is favored in the case of high transmit power.
Year
DOI
Venue
2015
10.1109/GLOCOM.2015.7416942
2015 IEEE Global Communications Conference (GLOBECOM)
Keywords
Field
DocType
system energy efficiency quantification,SU-MIMO downlink,MU-MIMO downlink,single-user transmission,multiuser transmission,downlink multiple-input multiple-output channels,power control algorithms,power allocation optimization,minimum spectral efficiency gain,antenna selection,diversity gain
Diversity gain,Transmitter,3G MIMO,Transmitter power output,Multi-user MIMO,Computer science,MIMO,Real-time computing,Spectral efficiency,Telecommunications link
Conference
ISSN
Citations 
PageRank 
2334-0983
0
0.34
References 
Authors
18
6
Name
Order
Citations
PageRank
Qi Wang1103.07
Gubong Lim244215.66
Leonard J. Cimini321914.06
Larry J. Greenstein452076.65
Douglas S. Chan5908.37
Ahmadreza Hedayat651557.78