Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A New Space-Time Cooperative Diversity Relaying Strategy with Assistant and Management Terminals

보조 및 관리 단말을 갖는 새로운 시공간 협동 다이버시티 중계 전략

  • Kim, Eun-Ki (School of Electrical & Computer Engineering, Chungbuk National, Univ.) ;
  • Kim, Young-Ju (School of Electrical & Computer Engineering, Chungbuk National, Univ.)
  • 김은기 (충북대학교 정보통신공학과 무선통신시스템연구실) ;
  • 김영주 (충북대학교 정보통신공학과 무선통신시스템연구실)
  • Published : 2007.01.25
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Abstract

A new space-time cooperative communication relaying strategy with assistant or management terminals is proposed in multi-hop wireless communication systems. More than one relaying terminals are included in one cooperative group to share the state information such as frame error rate and channel information. Among the cooperative group, the best ones are selected to send bit information using space-time codes. An implementation for the proposed scheme is also presented using a TDMA cooperative protocol. Receive signal to transmit signal ratio($E_r/E_s$) and computer simulation show the strategy outperform the conventional cooperative system.

본 논문에서는 다중-홉(multi-hop) 무선통신시스템에서 보조 및 관리단말을 추가로 갖는 시공간 협동 다이버시티 중계 시스템을 제안한다. 한 협동그룹에 1개 이상의 중계단말을 추가하여, 프레임 에러여부 및 채널정보 등의 상태정보만을 공유한다. 상태가 좋은 수신신호를 가지는 단말을 선택하며, 선택된 각 중계단말은 같은 시공간 부호로 다중안테나 송신다이버시티 중계전송을 한다. 그리고 협동그룹 내에 중계단말 간의 교신 프로토콜을 제안한다. 이 방식에 대해, 수신신호 대 송신신호 비($E_r/E_s$)를 측정하여 성능개선 됨을 증명하였으며, 플랫 페이딩(flat-fading) 채널에서의 시뮬레이션은 기존의 협동다이버시티에 비해 혁신적인 성능향상을 보인다.

Keywords

References

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