METHOD OF MANUFACTURING DISTORTION COMPENSATION APPARATUS

摘要

A distortion compensator 10 acquires an asymmetric component included in a 1-bit pulse train outputted from a DSM 6 on the basis of an analog signal as an output signal obtained from the 1-bit pulse train, and an IQ signal as an input signal to be inputted to the DSM 6, and performs distortion compensation on the basis of the asymmetric component. The distortion compensator 10 is caused to store therein asymmetric component data representing the acquired asymmetric component. When acquiring the asymmetric component, the distortion compensator 10 acquires, as an asymmetric component, a difference between an output baseband signal obtained by orthogonally demodulating the analog signal as the output signal, and an input baseband signal before being orthogonally modulated.

主权项

1. A method of manufacturing a distortion compensation apparatus configured to perform distortion compensation on a signal conversion device which converts an input signal into a 1-bit pulse train,
the 1-bit pulse train having a pulse rising waveform and a pulse falling waveform, the pulse rising waveform having a first distortion component with respect to an ideal pulse rising waveform, and the pulse falling waveform having a second distortion component with respect to an ideal pulse falling waveform, the method comprising: an acquisition step of acquiring an asymmetric component which makes the first distortion component and the second distortion component, included in the 1-bit pulse train, asymmetrical with respect to a time axis, on the basis of the input signal, and an output signal obtained from the 1-bit pulse train outputted from the signal conversion device; and a storage step of causing the distortion compensation apparatus that performs distortion compensation on the basis of the asymmetric component to store therein the asymmetric component acquired in the acquisition step, wherein the input signal is modulated and then converted into the 1-bit pulse train by the signal conversion device, and in the acquisition step, a difference between an output baseband signal obtained by demodulating the output signal and an input baseband signal which is the input signal before being modulated is acquired as the asymmetric component.