대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

Feedforward 방식을 이용한 PCS용 Predistorter의 설계 및 제작

Design and Fabrication of Predistorter for PCS Using Feedforward Method

  • 최현주 (성균관대학교 전기 전자 및 컴퓨터 공학부) ;
  • 박명석 (성균관대학교 전기 전자 및 컴퓨터 공학부) ;
  • 박천석 (성균관대학교 전기 전자 및 컴퓨터 공학부)
  • 발행 : 2000.11.01
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초록

In this paper, predistorter for PCS has been designed and fabricated. In predistorter system IMD signal generator was very important element. In this LPA IMD signal generator was fabricated using main signal cancellation and error signal cancellation of feedforward method and two amplifier that had same IMD characteristics. This LPA showed IMD characteristics of 52㏈c operation in 48㏈m(60W) and made 12㏈ IMD characteristic improvement when it was excited by two tone. In this LPA, to make more IMD characteristic improvement the IMD characteristic resemblance between main amplifier and predistortion amplifier is very important.

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