Signal and system design for wireless power transfer: prototype, experiment and validation
File(s)
Accepted version
Author(s)
Kim, Junghoon
Clerckx, Bruno
Mitcheson, Paul D
Type
Journal Article
Abstract
A new line of research on communications and signals design for Wireless Power Transfer (WPT) has recently emerged in the communication literature. Promising signal strategies to maximize the power transfer efficiency of WPT rely on (energy) beamforming, waveform, modulation and transmit diversity, and a combination thereof. To a great extent, the study of those strategies has so far been limited to theoretical performance analysis. In this paper, we study the real over-the-air performance of all the aforementioned signal strategies for WPT. To that end, we have designed, prototyped and experimented an innovative radiative WPT architecture based on Software-Defined Radio (SDR) that can operate in open-loop and closed-loop (with channel acquisition at the transmitter) modes. The prototype consists of three important blocks, namely the channel estimator, the signal generator, and the energy harvester. The experiments have been conducted in a variety of deployments, including frequency flat and frequency selective channels, under static and mobility conditions. Experiments highlight that a channel-adaptive WPT architecture based on joint beamforming and waveform design offers significant performance improvements in harvested DC power over conventional single-antenna/multi-antenna continuous wave systems. The experimental results fully validate the observations predicted from the theoretical signal designs and confirm the crucial and beneficial role played by the energy harvester nonlinearity.
Date Issued
2020-11-01
Date Acceptance
2020-07-07
Citation
IEEE Transactions on Wireless Communications, 2020, 19 (11), pp.7453-7469
ISSN
1536-1276
Publisher
Institute of Electrical and Electronics Engineers
Start Page
7453
End Page
7469
Journal / Book Title
IEEE Transactions on Wireless Communications
Volume
19
Issue
11
Copyright Statement
© 2020 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:000589218700032&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Telecommunications
Engineering
Array signal processing
Modulation
Signal design
Wireless communication
Prototypes
Rectennas
Wireless power transfer
Energy harvesting
wireless power transfer (WPT)
waveform
beamforming
WPT prototype
nonlinearity
WAVE-FORM DESIGN
ENERGY
Publication Status
Published
Coverage Spatial
Taipei, TAIWAN
Date Publish Online
2020-07-30