The present invention relates to a demodulation device and a demodulation
method, and its object is to demodulate subcarrier components utilizing
estimated delay profiles to control the timing for performing a Fourier
transform and the pass band of an interpolation filter used in
interpolating transmission channel characteristics along a frequency axis
so as to suppress unnecessary noise components, whereby an error rate
after the demodulation is reduced. To achieve the object, in a
demodulation device according to the present invention, a Fourier
transform unit 1 performs a Fourier transform according to a timing
signal and an interpolation filter unit 18 sets a pass band of a
frequency interpolation filter used for interpolation along the frequency
axis based on a signal corresponding to a maximum delay time, whereby the
frequency band of a transmission channel characteristic corresponding to
a subcarrier component is restricted when it is output.