Performance Analysis of a Novel Receive Antenna Selection Strategy in AF MIMO Relay Networks

Multiple-input multiple-output (MIMO), antenna selection, cooperative networks are key components of modern wireless communication systems (5G and beyond). In this paper, I propose a new antenna selection strategy for MIMO relay networks with a half-duplex amplify-and-forward (AF) relay. In such systems, there are three different receive antennas: the receive antennas at the relay and the destination nodes in the first time slot and the receive antenna at the destination node in the second time slot. I distinguish between the receive antennas at the destination in the first and the second time slots to enhance the received signals from both the transmitter and the relay nodes. I also present the theoretical results for the outage probability of the proposed antenna selection strategy along with its closed-form expression for mediumto-high signal-to-noise ratio (SNR). I compare the proposed methods in this paper with other similar strategies through simulations.