This letter investigates a multiple-relay decode-and-forward (DF) network with simultaneous wireless information and power transfer (SWIPT). The relays use the power splitting (PS) technique to receive radio frequency (RF) energy and information simultaneously from the source. To characterize nonlinearity of energy harvesters at the relays, two existing models are adopted, which are the logistic function model and the constant-linear-constant (CLC) model. We target end-to-end throughput maximization by optimizing the power and bandwidth assignment for every source-relay-destination link and the PS ratio at every relay node. The formulated problems are demonstrated to be nonconvex. Through a series of analysis and transformations, we find global optimal solutions for the formulated problems. Numerical results verify the effectiveness of our proposed methods.

中文翻译：

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具有非线性能量收集器的无线供电中继网络中的最佳资源分配

这封信调查了具有同步无线信息和电力传输 (SWIPT) 的多中继解码转发 (DF) 网络。继电器使用功率分配 (PS) 技术从源同时接收射频 (RF) 能量和信息。为了表征继电器能量收集器的非线性，采用了两种现有模型，即逻辑函数模型和常数-线性-常数 (CLC) 模型。我们通过优化每个源-中继-目的地链路的功率和带宽分配以及每个中继节点的 PS 比率来实现端到端吞吐量最大化。公式化的问题被证明是非凸的。通过一系列的分析和转换，我们找到了公式化问题的全局最优解。