Unified Performance Analysis of Two-Hop Fixed Gain Relay Systems with Beamforming

摘要

We present a unified performance analysis of a beamforming system in which the source and the destination are both equipped with multiple antennas while the relay is equipped with a single antenna. By assuming general correlation structures with arbitrary eigenvalue multiplicities at the source and the destination, the exact outage probability is derived for maximal ratio transmission (MRT)/maximal ratio combining (MRC) fixed gain relay network. Our new results unify several previously reported cases as well as new additional ones. Furthermore we derive the exact outage probability for transmit antenna selection (TAS)/MRC system and provide a performance comparison of the two systems. To gain insights, we also present high signal-to-noise ratio (SNR) expressions which clearly show the impact of number of transmit/receive antennas and correlation on the outage probability. Accuracy of the analytical results will be verified by Monte Carlo simulation at the end.