Performance Analysis of Distributed MIMO Systems in Rayleigh/Inverse-Gaussian Fading Channels

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In this paper, the authors pursue a performance evaluation of distributed Multiple-Input Multiple-Output (MIMO) systems in composite Rayleigh/Inverse-Gaussian fading channels. Capitalizing on some generic bounding techniques, they first derive new closed-form bounds on the ergodic capacity of optimal receivers. In order to gain useful insights into the impact of fading parameters on optimal receivers' performance, a detailed characterization in the asymptotically high and low signal-to-noise ratio regimes is also provided. In addition, they explore the "Large-system" regime and provide asymptotic expressions when the number of antennas grows large. A similar performance analysis is performed for the achievable sum rate of distributed MIMO systems employing linear minimum mean-square error receivers.