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Journal Article
Design of Reader Baseband Receiver Structure for Demodulating Backscattered Tag Signal in a Passive RFID Environment
- Authors
- Ji-Hoon Bae, WonKyu Choi, Chan-Won Park, Cheol-Sig Pyo, Kyung-Tae Kim
- Issue Date
- 2012-04
- Citation
- ETRI Journal, v.34, no.2, pp.147-158
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- 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. © 2012 ETRI.
- KSP Keywords
- Baseband receiver, DC-offset, Passive RFID, Passive radio frequency identification(RFID), Radio Frequency(RF), Receiver Structure, Tag Signal(TS), baseband signal, valid data