Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Metallography, Microstructure, and Analysis |
| Volume | 2014 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 Sep 15 |
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All Science Journal Classification (ASJC) codes
- Metals and Alloys
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Energy-efficient uplink power control for multiuser SIMO systems with imperfect channel state information. / Jang, Moonheok; Kwon, Younggap; Park, Hyunsung; Hwang, Taewon.
In: Metallography, Microstructure, and Analysis, Vol. 2014, No. 1, 15.09.2014, p. 1-11.Research output: Contribution to journal › Article
TY - JOUR
T1 - Energy-efficient uplink power control for multiuser SIMO systems with imperfect channel state information
AU - Jang, Moonheok
AU - Kwon, Younggap
AU - Park, Hyunsung
AU - Hwang, Taewon
PY - 2014/9/15
Y1 - 2014/9/15
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84910006800&partnerID=8YFLogxK
U2 - 10.1186/1687-1499-2014-166
DO - 10.1186/1687-1499-2014-166
M3 - Article
AN - SCOPUS:84910006800
VL - 2014
SP - 1
EP - 11
JO - Metallography, Microstructure, and Analysis
JF - Metallography, Microstructure, and Analysis
SN - 2192-9262
IS - 1
ER -