Patent ID: 11916566
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. An NFC device comprising:
an antenna which receives a data frame which includes a start pattern including first and second pattern signals modulated by a sub-carrier frequency and that are succeedingly input in the time domain, and a data pattern corresponding to the start pattern;
an analog-to-digital converter which samples each of the first and second pattern signals at a sampling period to generate each of a first input signal and a second input signal, and samples the data pattern at the sampling period to generate a data pattern input signal; and
a modem which receives the first and second input signals and the data pattern input signal, and reads data included in the data pattern on the basis of the first and second input signals and the data pattern input signal,
wherein the modem includes a first sub-matched filter which multiplies a first match signal generated on the basis of the sampling period by the first input signal to calculate a first result value of the first match signal and multiplies the first match signal by the second input signal to calculate a first result value of the first match signal, and a second sub-matched filter which multiplies a second match signal that is based on the sampling period and has a phase different from the first match signal by the first input signal to calculate a first result value of the second match signal, and multiplies the second match signal by the second input signal to calculate a second result value of the second match signal, and
the modem reads the data included in the data pattern, on the basis of a maximum result value among the first and second result values of the first match signal and the first and second result values of the second match signal, and the data pattern input signal.