A Hybrid Decode-and-Forward Relaying Scheme for Full Duplex Wireless Relay Networks

Abstract

Full duplex is a promising technique for enhancing spectral efficiency in wireless relay networks. In this paper, we study a three-node relay network consisting of a full duplex base station, a half duplex relay station, and a half duplex mobile station. Four kinds of decode-and-forward strategies are analyzed in terms of achievable rate region and sum-capacity, and a hybrid decode-and-forward scheme, which adaptively selects the best among the four strategies, is proposed to achieve the maximized capacity according to the channel conditions. Simulation results compare the capacities of the four kinds of strategies, and show that the proposed hybrid scheme provides significant capacity gain, especially in the edge of the cell.