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Study on the Demodulation Structure of Reader Receiver in a Passive RFID Environment
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- Authors
- J.-H. Bae, W. Choi, J. Kim, G.-Y. Choi, J.-S. Chae
- Issue Date
- 2009-05
- Citation
- Progress in Electromagnetics Research, v.91, pp.243-258
- ISSN
- 1070-4698
- Publisher
- EMW Publishing
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, we present a demodulation structure suitable for a reader receiver in a passive Radio Frequency IDentification (RFID) environment. In a passive RFID configuration, undesirable DC-offset phenomenon may appear in the baseband of the reader receiver. As a result, this DC-offset phenomenon can severely degrade the performance of the extraction of valid information from a received signal in the reader receiver. To mitigate the DC-offset phenomenon, we propose a demodulation structure to reconstruct a corrupted signal with the DC-offset phenomenon, by extracting useful transition information from the corrupted signal. It is shown that the proposed method can successfully detect valid data from a received signal, even when the received baseband signal is distorted with the DC-offset phenomenon.
- KSP Keywords
- DC-offset, Passive RFID, Passive radio frequency identification(RFID), Radio Frequency(RF), baseband signal, valid data