Power Allocation Games for MIMO Multiple Access Channels with Coordination
Elena Veronica Belmega, Samson Lasaulce, Merouane Debbah

TL;DR
This paper uses game theory to analyze decentralized power allocation in MIMO multiple access channels, introducing a coordination mechanism to improve network efficiency and studying the existence, uniqueness, and performance of Nash equilibria.
Contribution
It presents a novel game-theoretic framework for decentralized power allocation with a coordination signal in MIMO MACs, analyzing equilibrium properties and performance gaps.
Findings
Nash equilibrium exists and is unique under certain conditions.
Coordination improves sum-rate efficiency.
Performance gap between decentralized and virtual MIMO systems is often small.
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…
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Taxonomy
TopicsCooperative Communication and Network Coding · Advanced Wireless Network Optimization · Wireless Networks and Protocols
