This paper studies the performance of noncooperative game-theoretic power control techniques for wireless data networks in frequency-selective multipath. The uplink of an infrastructured network using ultrawideband signals as multiple access technique is considered. The effects of selfand multipleaccess interference on the performance of Rake receivers are investigated for synchronous systems. Focusing on energy efficiency, a noncooperative game is proposed in which users in the network are allowed to choose their transmit powers to maximize their own utilities. A large system analysis is performed to derive the properties of the Nash equilibrium for the proposed game. Performance of this technique is also compared to that of the Pareto-optimal (cooperative) solution.
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