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This paper proposes a new Clipped Gain (CG) relaying protocol that takes advantage of the first-hop channel state information available at the relay to efficiently use the transmit power. The CG allows the relay to transmit only when the first-hop signal-to-noise ratio(SNR) is above the outage threshold, otherwise, relay transmission is stopped as it leads in that case to an outage. Closed-form expressions...
This paper proposes new selection schemes based on one-bit feedback for a system with multiple amplify-and-forward relays and users over Rayleigh fading channels. We introduce new distributed selection (DS), simplified DS (DSS), and centralized selection (CS) schemes that reduce outage and save transmit power using one-bit feedback. The CS scheme is optimal by selecting only the dual-hop link with...
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