Linearization of OFDM signal using Predistorter

OFDM 신호의 사전 왜곡제거기를 이용한 비선형 왜곡보상

  • 신은영 (단국대학교 전자컴퓨터공학과) ;
  • 방성일 (단국대학교 전자컴퓨터공학과)
  • Published : 2002.06.01


In this paper, the structure of OFDM system is studied, and causes of inter carrier interference (ICI) are analyzed. Based on analysis, this paper shows a technique to prevent a distortion due to nonlinearity of high Power amplifier. The proposed scheme is a predistorter for high power amplifier linearization in orthogonal frequency division multiplexing (OFDM) system used in wireless local area network(WLAN). This is verified by comparing BER characteristics of OFDM system, between used PD and not used PD.