The paper derives the throughput of wireless communications using reconfigurable intelligent surfaces (RIS) with energy harvesting. The base station (BS) harvests energy using radio frequency signals received from node A over \(n_r\) antennas. The harvested energy is used to transmit data to N users. We optimize harvesting duration to maximize the throughput. We also suggest the use of two RIS. The first RIS is placed between node A and BS to improve the energy harvesting process. The second RIS is placed between BS and users so that all reflections have the same phase at each user. A set of reflectors is dedicated to each user. We show that wireless communication with eight and sixteen reflectors dedicated to a given user offers 12 and 18 dB gain with respect to wireless communications with energy harvesting and without RIS. The proposed wireless communications with two RIS with eight reflectors offer 27 dB gain with respect to wireless communications without RIS.

该论文使用具有能量收集功能的可重构智能表面 (RIS) 推导出无线通信的吞吐量。基站 (BS) 使用通过\(n_r\) 个天线从节点A接收到的射频信号来收集能量。收集到的能量用于向N 个用户传输数据。我们优化收获持续时间以最大化吞吐量。我们还建议使用两个RIS。第一个RIS放置在节点A之间和 BS 以改进能量收集过程。第二个 RIS 放置在 BS 和用户之间，以便每个用户的所有反射都具有相同的相位。一组反射器专供每个用户使用。我们表明，对于使用能量收集和不使用 RIS 的无线通信，使用专用于给定用户的 8 个和 16 个反射器的无线通信提供 12 和 18 dB 的增益。与没有 RIS 的无线通信相比，建议的具有两个 RIS 和八个反射器的无线通信提供 27 dB 的增益。