Hybrid Antenna Selection for Massive MIMO

Abstract

Although antenna selection (AS) is an effective way to decrease the hardware’s cost and complexity in massive multiple-input multiple-out (MIMO) systems, its computational complexity is becoming a problem for a large number of BS antennas. To reduce the complexity of AS, two hybrid AS schemes are proposed for massive MIMO in this paper, i.e. selection-selection AS and group-selection AS. The former is a selection-selection hybrid scheme and the latter is a group-selection hybrid scheme. Two proposed AS schemes can decrease the computational complexity effectively at a small cost in capacity performance loss, demonstrated by the presented numerical simulation results.