한국항해학회지 (Journal of the Korean Institute of Navigation)

한국항해항만학회 (Korean Institute of Navigation and Port Research)
권호 표지

전치왜곡 방식을 이용한 전력증폭기의 선형성 개선에 관한 연구

A Study on the Linearity Improvement of Power Amplifier by Predistortion Method

  • 김동일 (한국해양대학교 전파공학과) ;
  • 황재현 (주식회사 어필텔레콤통신연구소) ;
  • 유치환 (기가텔레콤(주))
  • 발행 : 2000.12.01
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초록

The 3rd order intermodulation(IM3) signals affect a great influence on fundamental signal because IM3 can not be rejected by a filter. To solve this problem, in this paper, a predistortion method was applied. The designed predistorter cascaded to 4 W power amplifier and tested with two-tone spreaded 5 MHz. As an experimental result, it was cleary shown that the 3rd order intermodulation distortion characteristics has been improved as much as 17 dB when the output of the power amplifier is 30.67 dB.

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