Amplify-and-Forward Based Two-Way Relay ARQ System With Relay Combination


In this letter, we tend to propose an automatic repeat request (ARQ) protocol for the amplify-and-forward (AF) based mostly two-means relay system. In the proposed ARQ scheme, the ARQ method is dispensed by the relay node (RN). We tend to assume that the RN has one buffer and it will store the signals received. With the help of the buffer, the RN can combine the signals received from totally different slots and choose to transmit or receive adaptively. 2 combining methods, namely the maximal sum signal-to-noise ratio combining (MSC) scheme and the maximal minimum signal-to-noise ratio combining (MMC) scheme, are proposed, that are shown to enhance the reliability of the relaying systems.

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