Amplify-and-forward method with fixed gain relays is one of the most attractive cooperative scheme due to its low complexity. In this paper, we propose a new relaying scheme, called the on-off relaying, where the relay is utilized only if the quality of the direct link between the source and the destination is lower then the relayed link. For this scheme, we present asymptotic performance analysis for the outage probability and average error probability for high SNRs. Monte Carlo simulations are used to verify these results.
Amplify-and-forward system fixed gain relay outage probability error probability
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