Journal of the Korean Institute of Telematics and Electronics S (전자공학회논문지S)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A New Subblock Partition Scheme for Partial Transmit Sequence Orthogonal Frequency Division Multiplexing System

부분전송열 직교 주파수분할다중화 시스템에서 새로운 부블럭분할법

  • Kang, Seok-Geun (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Kang, Kun-Seok (Staellite Communiations System Departmnet, Radio & Broadcasting Technology Laboratory, ETRI) ;
  • Kim, Jeong-Goo (Department of Information and Communication Engineering, Miryang National University) ;
  • Joo, Eon-Kyeong (School of Electronic and Electrical Engineering, Kyungpook National University)
  • 강석근 (慶北大學敎 電子電氣工學部) ;
  • 강군석 (韓國電子通信硏究院 無線放送技術硏究所 衛星通信시스템硏究部) ;
  • 김정구 (密陽大學敎 情報通信工學科) ;
  • 주언경 (慶北大學敎 電子電氣工學部)
  • Published : 1999.10.01
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Abstract

In this paper, a subblock partition scheme for reduction of computational complexity in partial transmit sequence which reduces the peak-to-average power ratio in orthogonal frequency division multiplexing (OFDM) is proposed. In this scheme, complex signals are assigned into partial subbands randomly and signals in a partial subband are duplicated and concatenated repetitively to make a subblock. By modulation of active subbands which have almost interleaved pattern, computational complexity can be reduced. As results of computer simulation, the proposed shows almost same peak to average power ratio reduction performance as compared to the conventional one. However, computational complexity required to transmit a partial transmit sequence OFDM symbol has been reduced extensively.

본 논문에서는 직교 주파수분할다중화의 첨두전력 대 평균전력비 감소를 위한 부분전송열 방식에서 연산 복잡도를 줄이기 위한 부블럭분할법이 제안된다. 여기서는 부블럭의 부분부대역에 랜덤하게 복소신호를 할당하고 이들을 반복적으로 연결시킨다. 그리고 보간 형태로 활성화된 부대역을 이용하여 변조함으로써 연산량이 감소된다. 모의실험 결과 제안된 방법은 기존의 방법과 거의 유사한 첨두전력 대 평균전력비 감소성능을 나타내었다. 그러나 부분전송열 직교 주파수분할다중화의 단일 심벌 전송에 요구되는 연산복잡도는 기존의 방법에 크게 감소됨을 알 수 있었다.

Keywords