We studied power splitting-based simultaneous wireless information and power transfer (PS-SWIPT) in multiple access channels (MAC), considering the decoding cost and non-linear energy harvesting (EH) constraints at the receiving nodes to study practical limitations of an EH communication system. Under these restrictions, we formulated and analyzed the achievable rate and maximum departure regions in two well-studied scenarios, i.e., a classical PS-SWIPT MAC and a PS-SWIPT MAC with user cooperation. In the classical PS-SWIPT MAC setting, closed-form expressions for the optimal values of the PS factors are derived for two fundamental decoding schemes: simultaneous decoding and successive interference cancellation. In the PS-SWIPT MAC with user cooperation, the joint optimal power allocation for users as well as the optimal PS factor are derived. This reveals that one decoding scheme outperforms the other in the classical PS-SWIPT MAC, depending on the function type of the decoding cost. Finally, it is shown that the cooperation between users can potentially boost the performance of a PS-SWIPT MAC under decoding cost and non-linear EH constraints. Moreover, effects of the decoding cost functions, non-linear EH model and channel quality between the users are studied, and performance characteristics of the system are discussed.
翻译:我们研究了多个接入渠道(MAC)中基于分权的同步无线信息和电源传输(PS-SWIPT),考虑到接收节点的分解成本和非线性能源采集(EH)限制,以研究EH通信系统的实际局限性,根据这些限制,我们在两种经过仔细研究的情景中,即典型PS-SWIPT MAC和与用户合作的PS-SWIPT MAC中,制定并分析了可实现的电率和最大离港区,这显示,在传统的PS-SWIPT MAC中,一个解密计划超越了另一个模式,这取决于解码成本的功能类型。 最后,在两种基本的解码计划下,对PS-S-SWIPT要素的封闭式表达方式表达了PS因素的最佳值:同时解码和连续取消干扰;在PS-S-SPMAC MAC中,我们制定并分析了用户之间可能提高ES-MIS系统非成本性功能的合作;在研究的ES-S-CLE-C-C-C-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-SLIN-S-S-S-C-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S