DIGITAL RECEIVING DEVICE AND WIRELESS COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a digital receiving device which can reduce ambient noise suitably without enlarging a scale of a circuit.

SOLUTION: An FSK (Frequency Shift Keying) digital receiving device 10 in a receiving state that an intended signal is continuously received detects a specific signal by a detection section 18b and set a detection time period as a non-communication state time period. The FSK digital receiving device 10 has a second noise removal section 17 which has an adaptive mode in which a filter factor is updated successively while removing the ambient noise during the set non-communication state time period and a non-adaptive mode in which filter factor updating is stopped during the receiving state time period excepting the non-communication state time period, and a filter control section 18c which controls the switching of an adaptive mode and a non-adaptive mode of the second noise removal section 17.

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