基于大规模天线的无线供能通信原型系统设计和实现

Prototype Design and Implementation for Large-Scale Antenna Based Wireless Powered Communication System

无线供能通信技术是未来6G时代支撑能量可持续无线通信的关键技术.本文首次提出了完整的基于大规模天线的无线供能通信系统的原型设计,并在软件定义无线电平台上实现了由32发射天线基站端、用户端和反馈链路组成的原型系统.在基站端,通过设计灵活的帧结构,原创性地提出了无线能量动态传输方案,实现了原型系统在信道估计准确性与无线能量传输效率之间的性能平衡.在用户端,通过建立实际的非线性能量采集模型和能耗模型,提出了新颖的用户端信息-能量双阈值电池管理方案,以满足不同的信息和能量传输需求.基于用户端状态信息的快速反馈,本文建立了闭环控制的无线能量和信息自适应传输系统框架.丰富的室内和室外实验验证了无线供能通信原型系统良好的无线环境适应性和传输性能.

The wireless powered communication is a key technology to support energy sustainable wireless communications in the future 6G era.For the first time,this paper proposes a complete prototype design for the large-scale antenna based wireless powered communication system,and realizes this prototype system,which consists of a base station with a 32-transmit-antenna array,a user equipment and a feedback link,on the software defined radio platforms.At the base station,by designing flexible frame structures,this paper originally proposes a dynamic wireless energy transmission scheme to properly balance the required channel estimation accuracy and the wireless energy transmission efficiency.At the user equipment,by applying the practical non-linear energy harvesting and energy consumption models,this paper proposes a novel information-energy double threshold based battery management scheme to meet the requirements of different information and energy transmission.Based on the prompt status feedback from the user equipment,this paper completes a closeloop controlled system framework for adaptive wireless information and energy transmissions.Extensive experiments for both indoor and outdoor scenarios are implemented to verify the good environment adaptation and transmission performance of the wireless powered communication prototype system.