A Design of High Power Amplifier Predistortor using Carrier Complex Power Series Analysis

Carrier Complex Power Series 해석을 통한 대전력 증폭기용 전치 왜곡기 설계

  • 윤상영 (세원텔레텍(주) 부설연구소) ;
  • 정용채 (전북대학교 공과대학 전자정보공학부 및 정보통신연구소)
  • Published : 2001.08.01

Abstract

In this paper, a new carrier complex power series which represents nonlinear transfer function of high power amplifier is derived. Using this transfer function, the nonlinear transfer function of predistortive circuit for linearizing the distortion effect of a HPA(High Power Amplifier) is derived and fabricated. A measured gain and $P_{1dB}$ of the fabricated HPA in IMT-2000 basestation transmitting band are 34.06 dB and 35.4 dBm. The predistortive circuit using inverse carrier complex power series is fabricated and operated with HPA. The predistortive HPA improves C/I(Carrier to Intermodulation) ratio of HPA by 17.01 dB(@Pout=25.43 dBm/tone) with 2-tone at 2.1375 GHz and 2.1425 GHz.

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References

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