Battery-Less Location Tracking for Internet of Things: Simultaneous Wireless Power Transfer and Positioning
- Authors
- Aziz, A.A.[Aziz, A.A.]; Ginting, L.[Ginting, L.]; Setiawan, D.[Setiawan, D.]; Park, J.H.[Park, J.H.]; Tran, N.M.[Tran, N.M.]; Yeon, G.Y.[Yeon, G.Y.]; Kim, D.I.[Kim, D.I.]; Choi, K.W.[Choi, K.W.]
- Issue Date
- Oct-2019
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Beam focusing; Cramer-Rao lower bound (CRLB); Internet of Things (IoT); location tracking; phased antenna array; positioning; wireless power transfer (WPT)
- Citation
- IEEE Internet of Things Journal, v.6, no.5, pp.9147 - 9164
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Internet of Things Journal
- Volume
- 6
- Number
- 5
- Start Page
- 9147
- End Page
- 9164
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/13983
- DOI
- 10.1109/JIOT.2019.2928313
- ISSN
- 2327-4662
- Abstract
- We propose a battery-less location tracking system that enables 3-D positioning of an Internet of Things (IoT) device powered by the radio frequency (RF) wireless power transfer (WPT). In the proposed system, a power beacon is equipped with a phased antenna array that has the dual purposes of high-efficiency WPT and phase-based accurate positioning. In order to enhance the efficiency of the RF WPT, we propose a beam focusing algorithm that dynamically controls the respective phases of antenna elements to place the focal point of the electro-magnetic (EM) wave onto the target IoT device. We also propose a phase-based positioning algorithm that requires only one multiantenna anchor point for determining the distance as well as the direction from the anchor point. We analyze the Cramer-Rao lower bound (CRLB) of the phase-based positioning with a single multiantenna anchor point, and show that the distance from the anchor point can be estimated as long as the IoT device lies within the radiative near-field region. We propose a joint location tracking and WPT algorithm that performs 3-D positioning and beam-focused WPT in a unified way. We have built a real-life testbed with a large-scale antenna array with 64 antenna elements for testing the proposed algorithm. The experimental results show the effectiveness of the proposed algorithm in a real environment. © 2014 IEEE.
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Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
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