University of Oulu

O. L. A. López, F. A. Monteiro, H. Alves, R. Zhang and M. Latva-Aho, "A Low-Complexity Beamforming Design for Multiuser Wireless Energy Transfer," in IEEE Wireless Communications Letters, vol. 10, no. 1, pp. 58-62, Jan. 2021, doi: 10.1109/LWC.2020.3020576

A low-complexity beamforming design for multiuser wireless energy transfer

Saved in:
Author: López, Onel L. A.1; Monteiro, Francisco A.2; Alves, Hirley1;
Organizations: 1Centre for Wireless Communications University of Oulu, Finland
2Instituto de Telecomunicações, and ISCTE - Instituto Universitário de Lisboa, Portugal
3National University of Singapore, Singapore
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-03-25


Wireless energy transfer (WET) is a green enabler of low-power Internet of Things (IoT). Therein, traditional optimization schemes relying on full channel state information (CSI) are often too costly to implement due to excessive energy consumption and high processing complexity. This letter proposes a simple, yet effective, energy beamforming scheme that allows a multi-antenna power beacon (PB) to fairly power a set of IoT devices by only relying on the first-order statistics of the channels. In addition to low complexity, the proposed scheme performs favorably as compared to benchmarking schemes and its performance improves as the number of PB’s antennas increases. Finally, it is shown that further performance improvement can be achieved through proper angular rotations of the PB.

see all

Series: IEEE wireless communications letters
ISSN: 2162-2337
ISSN-E: 2162-2345
ISSN-L: 2162-2337
Volume: 10
Issue: 1
Pages: 58 - 62
DOI: 10.1109/LWC.2020.3020576
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work is supported by Academy of Finland (Aka) (Grants n.307492, n.318927 (6Genesis Flagship), n.319008 (EE-IoT)), FCT (Foundation for Science and Technology) and Instituto de Telecomunicações through national funds, and when applicable co-funded EU funds, under the project UIDB/EEA/50008/2020.
Academy of Finland Grant Number: 307492
Detailed Information: 307492 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
319008 (Academy of Finland Funding decision)
Copyright information: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.