대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
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OFDM 시스템에서의 GD방식과 Radix-2 DIF IFFT를 이용한 효과적인 PAPR 감소 방식

A New PAPR Reduction Method in the OFDM System Using GD and Radix-2 Dif IFFT

  • 이선호 (충북대학교 전기전자컴퓨터공학부) ;
  • 이해기 (충청대 전기전자공학부) ;
  • 김성수 (충북대학교 전기전자컴퓨터공학부)
  • Lee, Sun-Ho (Faculty of electrical electronic and computer eng.) ;
  • Lee, Hae-Kie (Faculty of electrical and electronic eng) ;
  • Kim, Sung-Soo (Faculty of electrical electronic and computer eng.)
  • 발행 : 2007.11.16
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초록

Many methods have been developed to overcome the PAPR(peak-to-average power ratio) problem. Selective mapping(SLM) partial transmit sequence(PTS), subblock phase weighting(SPW) and gradient descent(GD) are used widely to reduce the PAPR. In this paper, we present a effective PAPR reduction method, decrease the calculation through Radix-2 DIF IFFT procedure and GD method. and can transmit selecting data sequence that satisfy threshold value as one part of proposed method, in case satisfy fixed threshold value, or transmit selecting data sequence with the lower papr operating remained part for performance improvement.

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