Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2003.07d
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- Pages.2690-2692
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- 2003
A Design of Predistorter for Independently Controllable AM/AM and AM/PM of High Power Amplifier
대전력증폭기의 AM/AM과 AM/PM을 독립적으로 제어하는 전치외곡보상기 설계
- Won, Yong-Kyu (Seoul Information Polytechnic College) ;
- Jung, Chan-Soo (Dept. E.E. Soongsil Univ)
- Published : 2003.07.21
Abstract
Amplifier linearity plays a major role in the design of mordern communication systems. An independently controllable AM/AM and AM/PM predistortion linearizers that consists 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 SdB with cdma2000 multi carrier signals. By applying this linearizer to two-tone 880MHz power amplifier, an improvement of adjacent channel leakage power up to 5dBm has been achieved.
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