| 摘要 |
Disclosed is a distortion-compensation device that can both perform distortion compensation with high precision and reduce the amount of storage space taken up by coefficients required for distortion-compensation calculations. Said distortion-compensation device (100) uses predistortion, in which an input signal is premultiplied by coefficients, to compensate for distortion in an output signal outputted from a given circuit. A first multiplication unit (200c) in this distortion-compensation device (100) multiplies an input signal by compensation coefficients selected from among candidate compensation coefficients in accordance with the input signal. Second multiplication units (201c1 through 201cm) multiply a delayed version of the input signal by tap coefficients, and an addition unit (202) outputs, to a given circuit, a signal obtained by adding together the compensation-coefficient-multiplied input signal and the tap-coefficient-multiplied delayed input signal. |
