双向中继网络中基于中继选择的物理层网络编码性能分析

In this paper, we investigate relay selection for a two-way cooperative relaying network, where the best-worse criterion is used to select a preferred relay each time to perform amplify-and-forward relaying. The closed-form expression of probability density function (PDF) and cumulative density function (CDF) of the two-way SNRs are derived. It is shown that the best-worse scheme achieves full diversity gain. The outage probability and asymptotic BER performance of our scheme are also derived through rigorous analysis. Simulation results show that our derived results for the best-worse relay selection scheme is consistent with the numerical results.