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The authors analyze the outage performance of a two-way fixed gain Amplify-and-Forward (AF) relay system with beamforming, arbitrary antenna correlation, and Co-Channel Interference (CCI). Assuming CCI at the relay, they derive the exact individual user outage probability in closed-form. Additionally, while neglecting CCI, they also investigate the system outage probability of the considered network, which is declared if any of the two users is in transmission outage. Their results indicate that in this system, the position of the relay plays an important role in determining the user as well as the system outage probability via such parameters as signal-to-noise imbalance, antenna configuration, spatial correlation, and CCI power.
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