| 摘要 |
An improved noise removal device capable of improving a removal precision of removing a pulse noise from a received signal. The noise removal device comprises: a hold control unit for receiving an input signal containing a received signal and a pulse noise mixed in the received signal, detecting pulse noise occurring periods, and deciding hold periods corresponding to the pulse noise occurring periods; a pilot signal extracting unit for extracting a pilot signal from the input signal; a pilot signal removing unit for removing and outputting a pilot signal from the input signal; a main signal extracting unit for extracting a main signal from the input signal; a hold circuit for holding, during hold periods, signal containing the main signal outputted from the main signal extracting unit; and a signal synthesizing unit for synthesizing the pilot signal with a signal outputted from the hold circuit during hold periods and with a signal outputted from the pilot signal removing unit during periods other than hold periods, thereby producing and outputting a received signal free from any pulse noise.
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