DEVICE FOR REMOVING INTERFERENCE OF SIGNALS HAVING DIFFERENT FEATURES AND REMOVING METHOD THEREFOR, ESPECIALLY IN RELATION TO EXACTLY REMOVING ANALOG SIGNALS INCLUDED IN DIGITAL SIGNALS

摘要

PURPOSE: A device for removing interference of signals having different features and a removing method therefor are provided to exactly remove analog signals included in digital signals by using a frequency position and a power ratio of the analog signals existing in the same frequency band as the digital signals, thereby preventing the digital signals from being distorted. CONSTITUTION: The first filter portion(410) consists of the first IIR notch filter(411), the first frequency tracking unit(413), and the first power ratio calculator(415). The first IIR notch filter(411) generates a notch having a predetermined depth and a predetermined width in a predetermined frequency position to remove the first carrier signal included in input signals. The frequency tracking unit(413) tracks frequencies of signals having different features, and supplies a position value of the notch. The power ratio calculator(415) calculates a power ratio of the signals having different features, and supplies a depth value of the notch based on the calculated power ratio.