Research Article
Decentralized power allocation for coordinated multiple access channels
@INPROCEEDINGS{10.4108/ICST.WIOPT2008.3213, author={Elena Veronica Belmega and Samson Lasaulce and Merouane Debbah}, title={Decentralized power allocation for coordinated multiple access channels}, proceedings={2nd International ICST Workshop on Wireless Networks: Communication, Cooperation and Competition}, publisher={IEEE}, proceedings_a={WNC3}, year={2008}, month={8}, keywords={Base stations DSL Decoding Fading Frequency Game theory Interference cancellation MIMO Transmitters Wireless networks}, doi={10.4108/ICST.WIOPT2008.3213} }- Elena Veronica Belmega
Samson Lasaulce
Merouane Debbah
Year: 2008
Decentralized power allocation for coordinated multiple access channels
WNC3
IEEE
DOI: 10.4108/ICST.WIOPT2008.3213
Abstract
In this paper, a game theoretic approach is used to derive the optimal power allocation in multiple access channels (MAC) for decentralized systems. Unlike previous results, a simple coordination mechanism is used between selfish users. The nature and influence of the coordination mechanism is studied in details for single antenna and multiple antenna terminals. In the proposed framework, the coordination signal indicates to the users in which order the receiver applies successive interference cancelation and with which frequency this order is used: it establishes the rule of the game. Remarkably, in Gaussian single input single output MACs, it is shown that, whatever the rule of the game, the selfish behavior of the users leads to a socially efficient network that is to say it is always sum-capacity achieving. However, for fast fading MAC with multi-antenna terminals, there can be a performance gap between the decentralized system and its centralized counterpart. Analytical and simulation results are provided to assess this gap.