| 摘要 |
An RFID(Radio Frequency IDentification) system is provided to improve response by removing DC offset dynamically generated according to an external environment condition including a distance between a reader and a tag. A DC offset remover(155) removes a DC offset component included in a demodulated signal demodulating a response signal received from the tag through the same frequency channel as the frequency channel of the reader and provides the demodulated signal removing the DC offset component to a digital processor(110). The digital processor is formed by one or more of a DSP(Digital Signal Processor), a processor, or digital signal processing hardware. The DC offset remover includes the first DC offset remover(155a) for removing the DC offset component included in an I-signal and the second DC offset remover(155b) for removing the DC offset component included in a Q-signal. |
