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Power Allocation Games for MIMO Multiple Access Channels with Coordination

Abstract : A game theoretic approach is used to derive the optimal decentralized power allocation (PA) in fast fading multiple access channels where the transmitters and receiver are equipped with multiple antennas. The players (the mobile terminals) are free to choose their PA in order to maximize their individual transmission rates (in particular they can ignore some specified centralized policies). A simple coordination mechanism between users is introduced. The nature and influence of this mechanism is studied in detail. The coordination signal indicates to the users the order in which the receiver applies successive interference cancellation and the frequency at which this order is used. Two different games are investigated: the users can either adapt their temporal PA to their decoding rank at the receiver or optimize their spatial PA between their transmit antennas. For both games a thorough analysis of the existence, uniqueness and sum-rate efficiency of the network Nash equilibrium is conducted. Analytical and simulation results are provided to assess the gap between the decentralized network performance and its equivalent virtual multiple input multiple output system, which is shown to be zero in some cases and relatively small in general.
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Contributor : Elena Veronica Belmega Connect in order to contact the contributor
Submitted on : Wednesday, January 13, 2010 - 6:23:20 PM
Last modification on : Thursday, June 17, 2021 - 3:47:17 AM
Long-term archiving on: : Friday, June 18, 2010 - 12:50:46 AM


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  • HAL Id : hal-00446971, version 1


Elena Veronica Belmega, Samson Lasaulce, Merouane Debbah. Power Allocation Games for MIMO Multiple Access Channels with Coordination. IEEE Transactions on Wireless Communications, Institute of Electrical and Electronics Engineers, 2009, 8 (6), pp.3182-3192. ⟨hal-00446971⟩



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