METHOD AND APPARATUS FOR IDENTIFYING ANALOG SIGNAL OR DIGITAL SIGNAL USING DOE FILTER

摘要

A method and an apparatus for discriminating an analog signal from a digital signal by using a DoE filter are provided to differentiate a signal by using the DoE filter and extract features from the differentiated signal in order to discriminate the signal. A method for discriminating an analog signal from a digital signal by using a DoE(Difference of Estimator) filter comprises the following steps of: extracting amplitude components and phase components from a baseband signal received through a communication network and estimating carrier frequency offset from the extracted components; extracting differential components from the preprocessed amplitude and phase components by applying the DoE filter; and calculating features from output of the DoE filter, and discriminating whether the received baseband signal is the analog signal or the digital signal by comparing the calculated features with predetermined reference.