Exploiting spatial correlation in distributed MIMO networks

Distributed-Multiple Input Multiple Output (D-MIMO) communication systems consist an attractive solution for networks with increased capacity demands. In these systems, the required information that needs to be exchanged among the network elements increases the data overhead and hence decreases the effective sum-rate (or throughput). Recently, it was shown that the total required overhead for D-MIMO networks can be reduced through its partitioning into smaller orthogonal D-MIMO segments. In this paper, a new scheme is proposed for further improving the effective sum-rate of D-MIMO networks by means of exploiting the spatial channels correlation within the D-MIMO network. Such effects can be observed in dense networks and the scope of the proposed correlation exploitation techniques is to avoid sending redundant feedback information. Numerical results indicate that important savings can be achieved when this novel method is applied under different wireless environments.