Cooperative ARQ with Phase Pre-Compensation

In this paper, we propose a novel cooperative ARQ scheme for static channel. The relay nodes, who decode the source´s packet correctly, participate in the cooperation to retransmit the packet erroneously received by the destination node. In the cooperative retransmission, we consider simultaneous transmissions, where the phase pre-compensation method is introduced at each relay node to prevent the signals from summing destructively at the destination node. The phase information is obtained by the estimation at each of the relay nodes. The analysis and simulation results are provided to evaluate the proposed scheme in terms of the packet error rate (PER). The proposed cooperative ARQ scheme provides significant performance gain compared to conventional one.