M-FSK OCC OCC APPARATUS AND METHOD FOR DEMODULATING M-FSK MODULATED SIGNAL BASED ON DEVICE'S MOVEMENTS

摘要

An embodiment of the present disclosure is a demodulation method in which a processor of a signal receiving device including a rolling camera performs at least a part of each step, the step of determining the movement of the signal receiving device based on a motion sensor, the rolling camera using a light source generating a plurality of image frames by photographing a plurality of times at different times; generating a received signal including an FSK modulated signal based on the plurality of image frames; The method may include performing a convolution operation on a plurality of preset matched filters, detecting an FSK-modulated signal included in the received signal based on a result of the convolution operation, and extracting data based on the FSK-modulated signal.