Abstract
The paper present puts forward a numerical decoding method using low sampling rate of frequency shift keying (FSK) on UHF radio frequency identification tags (RFID) readers. This method is not only applicable to the signal detection that the signal sampling rate is twice higher than the frequency of signal detection, but also to the signal detection that the signal sampling rate is twice lower than the frequency of signal detection. Itpsilas a better solution when that the high symbol rate using low sampling rate and adopting aliased signal for detecting frequency shift keying signal, and it also solves the multi-signals collision detection problem.
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