Game-Theoretic Power Control in Impulse Radio UWB Wireless Networks

摘要

In this paper, a game-theoretic model for studying power control for wirelessdata networks in frequency-selective multipath environments is analyzed. Theuplink of an impulse-radio ultrawideband system is considered. The effects ofself-interference and multiple-access interference on the performance of Rakereceivers are investigated for synchronous systems. Focusing on energyefficiency, a noncooperative game is proposed in which users in the network areallowed to choose their transmit powers to maximize their own utilities, andthe Nash equilibrium for the proposed game is derived. It is shown that, due tothe frequency selective multipath, the noncooperative solution is achieved atdifferent signal-to-interference-plus-noise ratios, respectively of the channelrealization. A large-system analysis is performed to derive explicitexpressions for the achieved utilities. The Pareto-optimal (cooperative)solution is also discussed and compared with the noncooperative approach.