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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Design of Reader Baseband Receiver Structure for Demodulating Backscattered Tag Signal in a Passive RFID Environment

  • Bae, Ji-Hoon (IT Convergence Technology Research Laboratory, ETRI) ;
  • Choi, Won-Kyu (IT Convergence Technology Research Laboratory, ETRI) ;
  • Park, Chan-Won (IT Convergence Technology Research Laboratory, ETRI) ;
  • Pyo, Cheol-Sig (IT Convergence Technology Research Laboratory, ETRI) ;
  • Kim, Kyung-Tae (Department of Electronic and Electrical Engineering, Pohang University of Science and Technology)
  • Received : 2011.06.12
  • Accepted : 2011.10.11
  • Published : 2012.04.04
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Abstract

In this paper, we present a demodulation structure suitable for a reader baseband receiver in a passive radio frequency identification (RFID) environment. In a passive RFID configuration, an undesirable DC-offset phenomenon may appear in the baseband of the reader receiver, which can severely degrade the performance of the extraction of valid information from the received tag signal. To eliminate this DC-offset phenomenon, the primary feature of the proposed demodulation structures for the received FM0 and Miller subcarrier signals is to reconstruct the signal corrupted by the DC-offset phenomenon by creating peak signals from the corrupted signal. It is shown that the proposed method can successfully detect valid data, even when the received baseband signal is distorted by the DC-offset phenomenon.

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References

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  2. Modeling and Simulation of New Encoding Schemes for High-Speed UHF RFID Communication vol.37, pp.2, 2012, https://doi.org/10.4218/etrij.15.2314.0111
  3. Multiple Orthogonal Subcarrier Modulation based High-Speed UHF RFID System for Multiple-/Dense-Interrogator Environments vol.53, pp.9, 2016, https://doi.org/10.5573/ieie.2016.53.9.067