통신용 전력증폭기의 AM/AM 과 AM/PM을 독립적으로 제어하는 전치왜곡보상기 설계에 대한 연구

• 영문명: A Study of Predistorter for Independently Controllable AM/AM and AM/PM of Power Amplifier for the Communication System
• 발행기관: 한국산업기술융합학회(구. 산업기술교육훈련학회)
• 저자명: 원용규(Yong Kyu Won)
• 간행물 정보: 『산업기술연구논문지』산업기술교육훈련논문지 제15권 4호, 43~50쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2010.12.30

영문 초록

Amplifier linearity plays a major role in the quality of mordem communication systems. The power amplifier should be operated near saturation region to achieve high efficiency. But at this region amplitude and phase distortions of the amplifier remarkably increase with the input power increase and cause a significant adjacent channel interference. In this paper, an independently controllable AM/AM and AM/PM predistortion linearizers consisted of two bias feed resistance linearizers is proposed. This linearizer allows independent adjustment of the AM/AM and AM/PM curves by using two adjustable voltages to compensate the power amplifier non-linearities. The predistortion linearizer can improve the ACPR by 5.3dB with cdma2000 multi carrier signals. And by applying this linearizer to two-tone(880MHz) power amplifier, third order IMD products are improved up to 8[dB].

목차

ABSTRACT

Ⅰ. 서론

Ⅱ. 실험

Ⅲ. 실험결과 및 고찰

Ⅳ. 결론

참고문헌

키워드

전치왜곡 진폭변조/진폭변조 진폭변조/위상변조 혼변조 인접채널 전력비 Predistortion AM/AM AM/PM IMD(Inter-Modulation Distortion ACPR(Adjacent Channel Power Ratio