A Combined Antenna Selection Algorithm in MIMO Systems

Antenna selection is used for increasing the channel capacity of multiple-input multiple-output (MIMO) systems, and reducing the systems complexity and RF chains cost. In this paper, we first study the capacities of MIMO systems, having different antenna assignments between the transmitter and receiver, and propose an optimum assignment from the viewpoint of maximizing the channel capacity. Considering the selections at both transmitter and receiver, the combined antenna selection algorithm is proposed based on the norm and correlation between rows and columns of the channel matrix. The proposed selection requires low computational complexity because of avoiding matrix operations. Simulation analysis and comparisons indicate that its performance is very close to the optimum combined selection, better than the optimum selection only at the receiver.