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http://dx.doi.org/10.3837/tiis.2017.02.036

Implementation of Bistatic Backscatter Wireless Communication System Using Ambient Wi-Fi Signals  

Kim, Young-Han (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Ahn, Hyun-Seok (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Yoon, Changseok (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Lim, Yongseok (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Lim, Seung-ok (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Yoon, Myung-Hyun (Smart Network Research Center, KETI (Korea Electronics Technology Institute))
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.11, no.2, 2017 , pp. 1250-1264 More about this Journal
Abstract
This paper presents the architecture design, implement, experimental validation of a bistatic backscatter wireless communication system in Wi-Fi network. The operating principle is to communicate a tag's data by detecting the power level of the power modulated Wi-Fi packets to be reflected or absorbed by backscatter tag, in interconnecting with Wi-Fi device and Wi-Fi AP. This system is able to provide the identification and sensor data of tag on the internet connectivity without requiring extra device for reading data, because this uses an existing Wi-Fi AP infrastructure. The backscatter tag consists of Wi-Fi energy harvesting part and a backscatter transmitter/a power-detecting receiver part. This tag can operate by harvesting and generating energy from Wi-Fi signal power. Wi-Fi device decodes information of the tag data by recognizing the power level of the backscattered Wi-Fi packets. Wi-Fi device receives the backscattered Wi-Fi packets and generates the tag's data pattern in the time-series of channel state information (CSI) values. We believe that this system can be achieved wireless connectivity for ultra- low-power IoT and wearable device.
Keywords
Backscatter communication; Wi-Fi; sensor tag; ambient RF; Channel State Information (CSI);
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