Capacity Scaling in MIMO Systems With General Unitarily Invariant Random Matrices.

We investigate the capacity scaling of multiple-input-multiple-output systems with the system dimensions. To that end, we quantify how the mutual information varies when the number of antennas (at either the receiver or transmitter side) is altered. For a system comprising R receive and T transmit antennas with R > T, we find the following: by removing as many receive antennas as needed to obtain ...