Performance of MIMO order and antenna subset selection in realistic urban macro cell

Abstract

Within this contribution the robustness and reliability of MIMO order (MOS) and antenna subset selection (AS) procedures has been studied. We considered AS for spatial multiplex (SM) systems, where the total power is distributed equally among selected antennas. MIMO channel data sets from a channel sounding campaign in an urban macro cell scenario have been used for advanced performance evaluation. At first, we studied correlation characteristics along various measurement tracks with single and dual polarized antenna configurations. We found that even under NLOS high correlation between antenna elements appears. Based on channel correlation at the transmit side and the receive SNR we discussed different methods for adaptive switching of the number of active RF modules and followed by optimized antenna subset selection (AS). Until a certain SNR threshold our novel low complex proposals perfectly follow the known algorithms from literature.