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 Home > Achievement > Main Contributions > SCI > Fundamentals of Wireless Information and Power Transfer: From RF Energy Harvester Models to Signal and System Designs

Domestic/International 국외  Principal Author Dong In Kim 
Title Fundamentals of Wireless Information and Power Transfer: From RF Energy Harvester Models to Signal and System Designs 
Journal IEEE Journal on Selected Areas in Communications (Impact Factor : 11.420 ; JCR 상위 5%) 
Authors Bruno Clerckx, Rui Zhang, Robert Schober, Derrick Wing Kwan NgDong In Kim, H. Vincent Poor 
Date 2019년 1월 Page 4 - 33 
Volume 37   Number 1 

Radio waves carry both energy and information simultaneously. Nevertheless, radio-frequency (RF) transmissions of these quantities have traditionally been treated separately. Currently, the community is experiencing a paradigm shift in wireless network design, namely, unifying wireless transmission of information and power so as to make the best use of the RF spectrum and radiation as well as the network infrastructure for the dual purpose of communicating and energizing. In this paper, we review and discuss recent progress in laying the foundations of the envisioned dual purpose networks by establishing a signal theory and design for wireless information and power transmission (WIPT) and identifying the fundamental tradeoff between conveying information and power wirelessly. We start with an overview of WIPT challenges and technologies, namely, simultaneous WIPT (SWIPT), wirelessly powered communication networks (WPCNs), and wirelessly powered backscatter communication (WPBC). We then characterize energy harvesters and show how WIPT signal and system designs crucially revolve around the underlying energy harvester model. To that end, we highlight three different energy harvester models, namely, one linear model and two nonlinear models, and show how WIPT designs differ for each of them in single-user and multi-user deployments. Topics discussed include rate-energy region characterization, transmitter and receiver architectures, waveform design, modulation, beamforming and input distribution optimizations, resource allocation, and RF spectrum use. We discuss and check the validity of the different energy harvester models and the resulting signal theory and design based on circuit simulations, prototyping, and experimentation. We also point out numerous directions that are promising for future research. Index Terms— Wireless information and power transfer, wireless power transfer, wireless powered communications, wireless energy harvesting communications, rate-energy region, linear and nonlinear energy harvester modeling, signal and system design, prototyping, experimentation.

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