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

Claim 17:
18. A method of operating an NFC device, the method comprising:
setting data type information on the basis of received data type;
receiving a data frame which includes a start pattern including first and second pattern signals modulated by a sub-carrier frequency in accordance with the received data type and that are succeedingly input in the time domain, and a data pattern corresponding to the start pattern;
sampling the first pattern signal at a sampling period to generate a first input signal, and sampling the second pattern signal at the sampling period to generate a second input signal; and
multiplying 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 multiplying the first match signal by the second input signal to calculate a second result value of the first match signal, by a first sub-matched filter;
multiplying 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 multiplying the second match signal by the second input signal to calculate a second result value of the second match signal, by a second sub-matched filter which is different from the first sub-matched filter;
selecting an enable filter among the first and second sub-matched filters, on the basis of the first and second result values of the first match signal and the first and second result values of the second match signal; and
reading data included in the data pattern on the basis of the enable filter.