Dc component extraction apparatus, dc component extraction method, and demodulation apparatus

Abstract

According to one embodiment, a DC component extraction apparatus includes a first and a second Hilbert transformer, a first and a second delay unit, and an adder. The first Hilbert transformer applies a phase shift of 90° to an input signal. The second Hilbert transformer applies a phase shift of 90° to a signal output from first Hilbert transformer to generate a filtered signal. The first delay unit delays the input signal by a delay time corresponding to the first Hilbert transformer. The second delay unit delays a signal output from the first delay unit by a delay time corresponding to the second Hilbert transformer to generate a delay signal. The adder adds the filtered signal and the delay signal.

Dependencies are inferred from the claim text.