In-band full-duplex (IFD) two-way relay (TWR) system becomes one among the major concern for maximizing system capacity in wireless network, where one relay node and two source nodes using analog network coding (ANC) are deployed. This paper compares one-time-slot ANC (1TA) TWR, in which each node operates in IFD mode, with two-time-slot ANC (2TA) TWR, where each node is in in-band half-duplex mode. In addition, achievable sum rate of the 1TA-TWR is derived with adverse factors such as direct link interference as well as self-interference (SI), which is induced by IFD signaling. This paper proposes an iterative optimal power allocation (OPA) method to maximize the derived end-to-end sum rate, which is based on Lagrangian and Newton-Raphson algorithm under total power constraint. Numerical results elucidate the efficiency of the 1TA-TWR over the 2TA-TWR as the following: the 1TA-TWR based on the OPA becomes more and more viable than the 2TA-TWR based on existing OPA, as the relay node goes into the center of two source nodes, the link channel gain of mutual source nodes increases, and the SI channel gain approaches noise floor level.

中文翻译：

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带时隙双路中继的带内全双工系统性能评估

带内全双工（IFD）双向中继（TWR）系统已成为无线网络中最大化系统容量的主要问题之一，其中部署了一个使用模拟网络编码（ANC）的中继节点和两个源节点。本文将一个时隙ANC（1TA）TWR和每个时隙都处于带内半双工模式的两个时隙ANC（2TA）TWR进行了比较，其中每个时隙都在IFD模式下运行。此外，还可以通过IFD信令引起的不利因素（例如直接链路干扰以及自干扰（SI））得出1TA-TWR的可实现总速率。提出了一种在总功率约束下基于拉格朗日和牛顿-拉夫森算法的迭代最优功率分配（OPA）方法，以最大化推导的端到端总和率。