End-to-end performance of transmit antenna selection and generalized selection combining in dual-hop amplify-and-forward relay network in the presence of feedback errors

In this paper, end-to-end performance of transmit antenna selection (TAS) and generalized selection combining (GSC) is studied in a dual-hop amplify-and-forward relay network over flat Rayleigh fading channels. In the system, source and destination equipped with multiple antennas, communicate by the help of single relay equipped with single antenna. Source-destination link is not available. TAS is used for transmission at the source, and GSC is used for reception at the destination. By considering the relay location and the presence of error in feedback channel from the relay to the source, we derive closed-form outage probability, moment generating function and moments of end-to-end signal-to-noise ratio, and closed-form symbol error probability (SEP) expressions for channel state information (CSI)-based and fixed relay gains. The diversity order and array gain of the network are obtained for both CSI-based and fixed relay gains by deriving asymptotical outage probability and SEP expressions. The analytical results are validated by the Monte Carlo simulations. Copyright (c) 2012 John Wiley & Sons, Ltd.