中文摘要：

针对传感器网络的特点，提出一种基于三时隙网络编码及选择性解码转发的双向中继协议，简称双向选择性解码转发协议（TW-SDF）。对比物理层网络编码中继协议，此协议具有高分集增益、低编解码复杂度及易系统实现等优点。更重要是从理论上推导出此中继协议在采用线性分组码及硬解码算法情况下的误块率上界。仿真实验表明，若采用BCH线性分组码，上述误块率上界能紧致地预测真实系统性能。

英文摘要：

A three-time-slot two-way relaying protocol, named as two-way selective decode-and-forward （TW-SDF） pro-tocol, was proposed. This relaying protocol integrates network coding and the selective decode-and-forward method, and was tailored for wireless networks with simple devices, like sensor networks. Compared with the well-known physi-cal-layer network coding protocol, the considered TW-SDF has the merits of full diversity order gain, low encoding and decoding complexity and easy-to-implement. Provided block codes, an upper bound on the block error rate of TW-SDF was derived and proved, which is valid for all hard decoders. Simulation results further verify that the upper bound is re-markably tight if BCH codes are utilized.