A SDM Method for the PAPR Reduction in the OFDM Communication System

OFDM 통신방식에서 PAPR 감소를 위한 SDM 방식

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

Abstract

In this paper, we propose a new subblock division method(SDM) for PAPR reduction in the OFDM communication system. The SDM divides the OFDM symbol into the several subblocks. If the PAPR is high, the some of the data subblocks are replaced by the dummy zero padding blocks. We propose SDM 1 and SDM 2 according to the structure. Even though the transmission efficiency may be partially lowered, the proposed SDM can considerably reduce the computational burden while maintaining similar PAPR reduction performance, compared with the PTS which is known to be the best in the conventional methods.

본 논문에서는 OFDM(Orthogonal Frequency Division Multiplexing)통신 시스템에서 발생하는 중요한 문제점인 PAPR(Peak to Average Power Ratio)을 저감하기 위하여 새로운 SDM(Subband Division Method) 방식을 제안한다. 제안 방식은 데이터 서브 블록을 몇 개의 서브블록으로 나누어 PAPR이 낮게 되는 서브블록까지 전송하고, 나머지 서브 블록은 다음번에 전송하는 방식이다. 적용 알고리즘에 따라 SDM 1과 SDM 2를 제안하였고 각각 성능을 분석 비교하였다. 제안 방식은 기존의 PAPR 저감 기법중 가장 좋은 PTS 방식과 비교하였을 경우, 비슷한 PAPR 저감성능을 보이면서도, 상당한 계산량 감소를 보인다.

Keywords

References

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