Energy-efficient uplink power control for multiuser SIMO systems with imperfect channel state information

Moonheok Jang, Younggap Kwon, Hyunsung Park, Taewon Hwang

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Pages (from-to)1-11
Number of pages11
JournalMetallography, Microstructure, and Analysis
Volume2014
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

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Channel state information
Power control
Base stations
Channel estimation
Dynamic response
Energy efficiency
Systems analysis
Costs

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

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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.",
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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, 01.01.2014, p. 1-11.

Research output: Contribution to journalArticle

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