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In this letter, uplink sum rate of large-scale multiuser MIMO systems with maximum ratio combining receivers is analyzed. To be practical, no perfect channel state information is assumed, and both large scale path loss and small scale Rayleigh fading are considered. The large scale path losses experienced by multiple users are also assumed to be non-identical due to different locations of the users...
This paper presents a robust linear processing scheme for the downlink of MIMO-relay systems with imperfect channel state information (CSI) aiming to minimize the mean squared error (MSE). The imperfect CSI consists of the channel estimate and the estimation error covariance matrix. The robust linear processing is based on the associated Karush-Kuhn-Tucker conditions. After obtaining the solution...
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