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Abstract: We consider wireless networks that can be modeled by multiple access channelsin which all the terminals are equipped with multiple antennas. The propagationmodel used to account for the effects of transmit and receive antennacorrelations is the unitary-invariant-unitary model, which is one of the mostgeneral models available in the literature. In this context, we introduce andanalyze two resource allocation games. In both games, the mobile stationsselfishly choose their power allocation policies in order to maximize theirindividual uplink transmission rates; in particular they can ignore somespecified centralized policies. In the first game considered, the base stationimplements successive interference cancellation SIC and each mobile stationchooses his best space-time power allocation scheme; here, a coordinationmechanism is used to indicate to the users the order in which the receiverapplies SIC. In the second framework, the base station is assumed to implementsingle-user decoding. For these two games a thorough analysis of the Nashequilibrium is provided: the existence and uniqueness issues are addressed; thecorresponding power allocation policies are determined by exploiting randommatrix theory; the sum-rate efficiency of the equilibrium is studiedanalytically in the low and high signal-to-noise ratio regimes and bysimulations in more typical scenarios. Simulations show that, in particular,the sum-rate efficiency is high for the type of systems investigated and theperformance loss due to the use of the proposed suboptimum coordinationmechanism is very small.

Autor: E. V. Belmega, S. Lasaulce, M. Debbah, M. Jungers, J. Dumont

Fuente: https://arxiv.org/

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