바이어스를 변조하는 고효율 전력 증폭기의 선형화 방법 및 그 장치
정재호, 조권도, 오정훈, 이광천, 김영훈
- 8018278 (2011.09.13)
- A pre-distortion apparatus of a power amplifier includes: a pre-distortion unit configured to generate a pre-distorted signal of an input signal by calculating a magnitude of the input signal and outputting a complex correction coefficient corresponding to the calculated magnitude of the input signal, and provide the generated pre-distorted signal as an input of the power amplifier; and a complex correct coefficient update unit configured to generate an error signal by comparing an output signal of the power amplifier with the input signal and updating the complex correction coefficient to minimize a magnitude of the generated error signal, wherein the pre-distortion unit provides a constant bias value corresponding to the magnitude of the input signal as a bias of the power amplifier while updating the complex correction coefficient.
- KSP 제안 키워드
- Correction coefficient, Error signal, Input signal, Pre-distorted, Pre-distortion, power amplifiers(PAs)