APPARATUS AND METHOD FOR RFID READER DEMODULATOR

摘要

PURPOSE: An RFID reader demodulation device and a method thereof are provided to perform coherent detection from DC offset noise-removed tag signal, thereby improving the reliability in demodulation of a tag signal, even if offset distortion noise is generated in the receives tag signal. CONSTITUTION: An RFID(Radio Frequency Identification System) reader demodulation device(100) comprises a DC(Direct Current) offset removal unit(102), a carrier removal unit(103), and a phase recover(104). The DC offset removal unit removes DC offset distortion noises of the received tag signal. The carrier removal unit removes a carrier signal in the output signal of the DC offset removal unit. The phase recover detects the phase information in the output signal of the carrier removal unit for the coherent detection.