Adaptive SLM and Side Information Insertion Method

적응 SLM 방식과 부가정보 삽입기법

  • 정락규 (충북대학교 전자공학과 및 컴퓨터정보통신연구소) ;
  • 유흥균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
  • Published : 2003.03.01


OFDM is effective for the high speed data transmission. However, the nonlinear distortion is a serious problem because of the high PAPR due to many subcarriers. The conventional SLM selects the OFDM signal with the lowest PAPR. In this method, OFDM data can be correctly recovered only if the side information about the phase sequence is transmitted to receiver. This paper proposes a new method of side information insertion into the conventional SLM and reduces the computational complexity by adaptive method. Performances are compared in case that three kinds of phase sequences are used for phase rotation factor. The adaptive SLM method has the same PAPR reduction as the conventional SLM method. The required BER can be guaranteed by the proposed method. When subcarrier number N=32, computational complexity is reduced to 48 %, 72 % and 51 % for the branch number U=4, 8 and 16, respectively.


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