Energy-efficient amplify-and-forward full-duplex transmission strategy

Abstract

Amplify-and-forward (AF) relay protocol can decrease system’s transmission time slots and full-duplex (FD) technique can improve system’s spectral-efficiency (SE). Combing relay technique with FD technique can further improve system’s SE. In this paper, two transmission strategies with considering the existence of direct link in relay transmission are designed first. At the same time, the detailed bidirectional SE and outage probability analyses of the designed transmission strategies are given. In addition, the energy-efficient transmissions of the designed transmission strategies are achieved. Furthermore, the EE comparisons among the designed transmission strategies are given. Simulations reveal that even with the residual self-interference, the designed transmission strategies still can improve the system’s SE and EE.