KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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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))
  • Received : 2016.09.12
  • Accepted : 2017.02.27
  • Published : 2017.02.28
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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.

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References

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