Single relay selection schemes in two-way relaying networks

Considering the issues involved in the multiple relaying cooperation such as the perfect synchronization and high complexity, some single-relay selection schemes are presented in this paper for two-way relaying networks, where this network is consisted of two source nodes and multiple relay nodes, each node with single antenna. The novel single-relay selection schemes based on the transmission rate maximization, equivalent channel gain maximization, and the minimization of the harmonic mean of channel gains, respectively, are proposed to determine the best relay. Numerical simulations are performed to show the performance of the proposed schemes in terms of the capacity and the cumulative distribution function of the two-way relaying network.