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The authors derive the outage capacity of a Bursty version of the Amplify-and-Forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. They show that the ratio between the outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol.
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