An energy-efficient approach to power control and receiver design in wireless data networks

In this paper, the cross-layer design problem of joint multiuser detection and power control is studied, using a game-theoretic approach that focuses on energy efficiency. The uplink of a direct-sequence code-division multiple-access data network is considered, and a noncooperative game is proposed...

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Bibliographic Details
Published in:IEEE transactions on communications 2005-11, Vol.53 (11), p.1885-1894
Main Authors: Meshkati, F., Poor, H.V., Schwartz, S.C., Mandayam, N.B.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Cross layer design
Decorrelation
Detection, estimation, filtering, equalization, prediction
Detectors
Energy efficiency
Energy measurement
Energy use
Exact sciences and technology
Focusing
game theory
Games
Information, signal and communications theory
Matched filters
Multiaccess communication
Multiuser detection
multiuser detectors
Nash equilibrium
Networks
Power control
Radiocommunications
Receivers
Signal and communications theory
Signal, noise
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Transmission and modulation (techniques and equipments)
Utilities
utility function
Valuation and optimization of characteristics. Simulation
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Summary:In this paper, the cross-layer design problem of joint multiuser detection and power control is studied, using a game-theoretic approach that focuses on energy efficiency. The uplink of a direct-sequence code-division multiple-access data network is considered, and a noncooperative game is proposed in which users in the network are allowed to choose their uplink receivers as well as their transmit powers to maximize their own utilities. The utility function measures the number of reliable bits transmitted by the user per joule of energy consumed. Focusing on linear receivers, the Nash equilibrium for the proposed game is derived. It is shown that the equilibrium is one where the powers are signal-to-interference-plus-noise ratio-balanced with the minimum mean-square error (MMSE) detector as the receiver. In addition, this framework is used to study power-control games for the matched filter, the decorrelator, and the MMSE detector; and the receivers' performance is compared in terms of the utilities achieved at equilibrium (in bits/joule). The optimal cooperative solution is also discussed and compared with the noncooperative approach. Extensions of the results to the case of multiple receive antennas are also presented. In addition, an admission-control scheme based on maximizing the total utility in the network is proposed.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2005.858695