Calibration device, conversion device, calibration method, and non-transitory computer-readable medium having recorded thereon calibration program

A calibration method comprising:

• supplying, as a calibration input signal, a multitone signal having tones at a plurality of frequencies to a converter configured to multiply an input signal by each of a plurality of signal patterns and limit a band to obtain each of a plurality of bandpass signals, and reconstruct an output signal in accordance with the input signal from the plurality of bandpass signals;
• acquiring a plurality of calibration bandpass signals obtained by the converter in response to the calibration input signal;
• and
• calibrating, based on each of the plurality of calibration bandpass signals, a correction filter configured to correct each of the plurality of bandpass signals.

A non-transitory computer-readable medium having recorded thereon a calibration program that is executed by a computer and causes the computer to function as:

• a calibration signal supply unit configured to supply, as a calibration input signal, a multitone signal having tones at a plurality of frequencies to a converter configured to multiply an input signal by each of a plurality of signal patterns and limit a band to obtain each of a plurality of bandpass signals, and reconstruct an output signal in accordance with the input signal from the plurality of bandpass signals;
• a calibration bandpass signal acquisition unit configured to acquire a plurality of calibration bandpass signals obtained by the converter in response to the calibration input signal;
• and
• a calibration processing unit configured to calibrate, based on each of the plurality of calibration bandpass signals, a correction filter configured to correct each of the plurality of bandpass signals.