Paper Info
Title
Energy-efficient uplink power control for multiuser SIMO systems with imperfect channel state information.
Abstract
This paper addresses energy-efficient design for uplink multiuser SIMO systems with imperfect channel state information (CSI) at the base station (BS). Since the CSI at the BS is always imperfect due to the channel estimation error and delay, the imperfectness of the CSI needs to be considered in practical system design. It causes interuser interference at the zero-forcing (ZF) receiver and makes it difficult to obtain the globally optimal power allocation that maximizes the energy efficiency (EE). Hence, we propose a non-cooperative energy-efficient uplink power control game, where each user selfishly updates its own uplink power. The proposed uplink power control game is shown to admit a unique Nash equilibrium. Furthermore, to improve the efficiency of the Nash equilibrium, we study a new game that utilizes a pricing mechanism. For the new game, the existence of a Nash equilibrium and the convergence of the best response dynamics are studied based on super-modularity theory. Simulation results show that the proposed schemes can significantly improve the EEs of the mobile users in uplink multiuser SIMO systems.
Year
DOI
Venue
2014
10.1186/1687-1499-2014-166
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
Energy efficiency, Multiuser, Multiple-input and multiple-output, Uplink, Channel state information, Game theory, Nash equilibrium
Base station,Computer science,Control theory,Best response,Systems design,Communication channel,Game theory,Nash equilibrium,Channel state information,Telecommunications link
Journal
Volume
Issue
ISSN
2014
1
1687-1499
Citations 
PageRank 
References 
1
0.35
31
Authors
4
Name
Order
Citations
PageRank
Moonheok Jang161.09
Younggap Kwon2284.11
Hyunsung Park3529.72
Taewon Hwang439931.78