Patent ID: 7796967

Claim:
A noise removal apparatus for processing a signal including a communication signal having been modulated and a noise, the noise removal apparatus comprising: a band separation section for separating the signal including the communication signal and the noise into a first signal which includes the communication signal and the noise and a second signal which includes only the noise, by using, as an upper-limit boundary, a center frequency of a frequency band of the communication signal, and outputting the first signal and the second signal; a conversion section for inverting a level of the second signal outputted by the band separation section, performing conversion of a frequency band of the second signal having the level inverted, to a frequency band of the first signal, and outputting, as a removal signal, a signal obtained by the conversion; and an adder for performing addition of the first signal to the removal signal, and outputting, as a corrected signal, a signal obtained by the addition.