Strict suboptimality of selection amplify-and-forward relaying under global channel information |
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| Authors: | Nikjah R Beaulieu NC |
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| Affiliation: | Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada; |
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| Abstract: | Selection amplify-and-forward (SAF) relaying, which has been shown to be optimal under the constraints of localized channel information at the relays and a constant relay power allocation (PA) template, is shown to be globally strictly suboptimal. A necessary condition for the outage optimality of the SAF PA, and an exponentially vanishing upper bound on the probability of the SAF optimality are derived. |
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