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In this paper, the authors introduce a collaborative Minimum Mean Squared Error (MMSE) interference canceller in MIMO relay networks. The proposed receiver architecture is characterized by the integration of the Generalized Minimum RESidual method (GMRES) for symbol detection. In this scheme, the GMRES method detects the transmitted symbols by solving iteratively a linear system representing the MMSE interference canceller without matrix inversion. The Relay - Destination channels are assumed to be orthogonal. They evaluate the instantaneous capacity of the equivalent MIMO relay network equipped with K parallel relay nodes for TDMA and MC-CDMA modes, using the assumption that the source node does not communicate directly with the destination node.
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