Authors
Farhad Meshkati, Andrea J Goldsmith, H Vincent Poor, Stuart C Schwartz
Publication date
2007/7/23
Journal
IEEE Journal on Selected Areas in Communications
Volume
25
Issue
6
Pages
1069-1078
Publisher
IEEE
Description
A game-theoretic framework is used to study the effect of constellation size on the energy efficiency of wireless networks for M-QAM modulation. A non-cooperative game is proposed in which each user seeks to choose its transmit power (and possibly transmit symbol rate) as well as the constellation size in order to maximize its own utility while satisfying its delay quality-of-service (QoS) constraint. The utility function used here measures the number of reliable bits transmitted per joule of energy consumed, and is particularly suitable for energy-constrained networks. The best-response strategies and Nash equilibrium solution for the proposed game are derived. It is shown that in order to maximize its utility (in bits per joule), a user must choose the lowest constellation size that can accommodate the user's delay constraint. This strategy is different from one that would maximize spectral efficiency. Using this framework …
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A game-theoretic approach to energy-efficient modulation in CDMA networks with delay QoS constraints
F Meshkati, AJ Goldsmith, HV Poor, SC Schwartz - IEEE Journal on Selected Areas in Communications, 2007