论文标题
Multiuser Miso PS-SWIPT系统：主动还是被动RI？
Multiuser MISO PS-SWIPT Systems: Active or Passive RIS?
论文作者
论文摘要
可重新配置的智能表面（RIS）的通信网络有望提高通道容量和能源效率。但是，由于双重路径效应，被动riss的承诺能力增长可能可以忽略不计。 Active Riss可以克服此问题，因为它们具有带有低成本放大器的反射元件。这封信研究了多源系统中的主动RIS AID同时无线信息和电力传输（SWIPT）。用户利用电力分解（PS）来解码信息并基于现实的分段非线性能量收集模型同时收集能量。目的是通过优化其光束形式，PS比和RIS相移/放大因子来最大程度地减少基站（BS）的发射功率。与没有较高计算复杂性成本相比，模拟结果显示出显着改善（例如19％和28％），最大反映功率分别为10 MW和15 MW。我们还显示了针对不完美的通道状态信息的拟议算法的鲁棒性。
Reconfigurable intelligent surface (RIS)-based communication networks promise to improve channel capacity and energy efficiency. However, the promised capacity gains could be negligible for passive RISs because of the double pathloss effect. Active RISs can overcome this issue because they have reflector elements with a low-cost amplifier. This letter studies the active RIS-aided simultaneous wireless information and power transfer (SWIPT) in a multiuser system. The users exploit power splitting (PS) to decode information and harvest energy simultaneously based on a realistic piecewise nonlinear energy harvesting model. The goal is to minimize the base station (BS) transmit power by optimizing its beamformers, PS ratios, and RIS phase shifts/amplification factors. The simulation results show significant improvements (e.g., 19% and 28%) with the maximum reflect power of 10 mW and 15 mW, respectively, compared to the passive RIS without higher computational complexity cost. We also show the robustness of the proposed algorithm against imperfect channel state information.
