| 摘要 |
PURPOSE: A pre-distortion device of a power amplifier and a method thereof are provided to fix a bias voltage of a power amplifier while a complex correction coefficient is updated, thereby distortion of a signal outputted from the power amplifier. CONSTITUTION: A pre-distortion unit(210) calculates the size of an input signal. The pre-distortion unit generates a pre-distortion signal of the input signal by outputting a complex correction coefficient corresponding to the size of the input signal. The pre-distortion unit provides the generated pre-distortion signal as input of the power amplifier. A complex correction coefficient updating unit(240) generates an error signal by comparing an output signal with the input signal of the power amplifier. The complex correction coefficient updating unit updates the complex correction coefficient to minimize the size of the generated error signal. The pre-distortion unit provides a fixed bias voltage value to the power amplifier while the complex correction coefficient is updated. |
