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 Home > Achievement > Main Contributions > SCI > Wireless-Powered Sensor Networks: How to Realize

Domestic/International 국외  Principal Author Kae Won Choi, Dong In Kim 
Title Wireless-Powered Sensor Networks: How to Realize 
Journal IEEE Transactions on Wireless Communications (Impact Factor : 2.925 ; JCR 상위 10%) 
Authors K. W. Choi, L. Ginting, P. A. Rosyady, A. A. Aziz, and D. I. Kim 
Date 2017년 01월 Page 221-234 
Volume 16   Number 1 

 In this paper, we study a multi-antenna wirelesspowered sensor network (WPSN), in which a power beacon wirelessly transfers electric energy to a sensor node via an electromagnetic wave. We have implemented a real-life multiantenna WPSN testbed and conducted extensive experiments on the testbed. The key technology for the high-efficiency WPSN is an adaptive energy beamforming scheme that dynamically steers a microwave beam towards a sensor node. We propose a receive power-based channel estimation and energy beamforming algorithm. In addition, an adaptive duty cycle control algorithm is proposed to prevent energy storage of a sensor node from being depleted. The proposed duty cycle control algorithm is designed based on a proportional-integral-derivative(PID) controller. These algorithms are all implemented in the multi-antenna WPSN testbed. By experiments, we validate the feasibility of the multi-antenna WPSN and show the performance of the proposed algorithms.

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