Reconfigurable Intelligent Surface Aided Constant-Envelope Wireless Power Transfer

By reconfiguring the propagation environment of electromagnetic waves artificially, reconfigurable intelligent surfaces (RISs) have been regarded as a promising and revolutionary hardware technology to improve the energy and spectrum efficiency of wireless networks. In this paper, we study a RIS aid...

Full description

Saved in:
Bibliographic Details
Main Authors: Yang, Huiyuan, Yuan, Xiaojun, Fang, Jun, Liang, Ying-Chang
Format: Conference Proceeding
Language:English
Subjects:
Array signal processing
constant envelope beamforming
Electromagnetic scattering
MISO communication
Optimization
Radio transmitters
Reconfigurable intelligent surface
Transmitting antennas
Wireless power transfer
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:By reconfiguring the propagation environment of electromagnetic waves artificially, reconfigurable intelligent surfaces (RISs) have been regarded as a promising and revolutionary hardware technology to improve the energy and spectrum efficiency of wireless networks. In this paper, we study a RIS aided multiuser multiple-input single-output (MISO) wireless power transfer (WPT) system, where the transmitter is equipped with a constant-envelope analog beamformer. We formulate a novel problem to maximize the total received power of all the users by jointly optimizing the beamformer at transmitter and the phase shifts at the RISs, subject to the individual minimum received power constraints of users. We further solve the problem iteratively with a closed-form expression for each step. Numerical results show the performance gain of deploying RIS and the effectiveness of the proposed algorithm.
ISSN:2576-6813
DOI:10.1109/GLOBECOM42002.2020.9322315