Journal of Korea Society of Industrial Information Systems (한국산업정보학회논문지)

Korea Society of Industrial Information Systems (한국산업정보학회)
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Space-Frequency Block Coded OFDMA Transmission System using Multiple Relays for Shadow Area

음영 지역을 위한 다중 중계기 기반의 주파수 공간 블록 부호화 OFDMA 전송 시스템

  • 원희철 (대구대학교 정보통신연구소/컴퓨터.IT공학부)
  • Received : 2014.03.20
  • Accepted : 2014.08.04
  • Published : 2014.08.30
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Abstract

In order to cope with shadow areas and to extend cell coverage, relay-assisted wireless communication systems have been widely studied. In this paper, we propose a space-frequency(SF) block coded orthogonal frequency division multiple access(OFDMA) transmission system in a relaying multi-path shadow area. The receiving performance of mobile station in a shadow area can be improved by applying SF block code to the recovered signals of multiple relays before re-transmitting them. The simulation result shows that the proposed SF block coded OFDMA transmission system considerably outperforms the conventional single-path OFDMA transmission system.

음영 지역 해소 및 셀 커버리지 확대를 위하여 중계기를 활용하는 이동 통신 시스템이 널리 연구되고 있다. 본 논문에서는 중계기를 통해 다중 경로가 확보된 음영 지역에서 주파수 공간 블록 부호를 적용한 OFDMA(orthogonal frequency division multiple access) 전송 시스템을 제안한다. 다중 중계기에서 복원된 전송 신호에 대하여 주파수 공간 블록 부호를 적용하여 재전송함으로서 음영 지역 내 단말기의 수신 성능을 크게 향상시킬 수 있다. 실험을 통해, 제안된 주파수 공간 블록 부호화 OFDMA 전송 시스템의 성능이 기존의 단일 경로 OFDMA 전송 시스템의 성능보다 우수함을 확인한다.

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References

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