Joint waveform and beamforming optimization for MIMO wireless power transfer
File(s)
Accepted version
Author(s)
Shen, Shanpu
Clerckx, Bruno
Type
Journal Article
Abstract
In this paper, we study a multi-sine multiple-input multiple-output (MIMO) wireless power transfer (WPT) system with the objective to increase the output DC power. We jointly optimize the multi-sine waveform and beamforming accounting for the rectenna nonlinearity, and consider two combining schemes for the rectennas at the receiver, namely DC and RF combinings. For DC combining, the waveform and transmit beamforming are optimized, as a function of the channel state information (CSI). For RF combining, the optimal transmit and receive beamformings are provided in closed form and the waveform is optimized. We also consider a practical RF combining circuit using phase shifter and RF power combiner and optimize the waveform, transmit beamforming, and analog receive beamforming adaptive to the CSI. Two types of performance evaluations, based on the nonlinear rectenna model and accurate and realistic circuit simulations, are provided. The evaluations demonstrate that the joint waveform and beamforming design can increase the output DC power by leveraging the beamforming gain, the frequency diversity gain, and the rectenna nonlinearity. It also shows that the joint waveform and beamforming design provides a higher output DC power than the beamforming-only design with a relative gain of 180% in a two-transmit antenna sixteen-sinewave two-receive antenna setup.
Date Issued
2021-08-01
Date Acceptance
2021-04-16
Citation
IEEE Transactions on Wireless Communications, 2021, 69 (8), pp.5441-5455
ISSN
1536-1276
Publisher
Institute of Electrical and Electronics Engineers
Start Page
5441
End Page
5455
Journal / Book Title
IEEE Transactions on Wireless Communications
Volume
69
Issue
8
Copyright Statement
© 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.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000684698800038&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Telecommunications
Engineering
Array signal processing
Rectennas
Radio frequency
MIMO communication
Optimization
Receiving antennas
Transmitting antennas
Beamforming
DC combining
MIMO
multi-sine
nonlinearity
optimization
RF combining
waveform
wireless power transfer
DESIGN
INFORMATION
RECTENNA
NONLINEARITY
SYSTEM
Publication Status
Published
Date Publish Online
2021-04-23