The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

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Efficient Low-Complexity Soft MIMO Symbol Detector for MIMO Systems

다중안테나 통신시스템을 위한 저복잡도 연판정 MIMO 심볼검출기법 연구

  • Jang, Soo-Hyun (Mobility Platform Center, Korea Electronics Technology Institute) ;
  • Shin, Dae-Kyo (Mobility Platform Center, Korea Electronics Technology Institute) ;
  • Yoon, Sang-Hun (Mobility Platform Center, Korea Electronics Technology Institute) ;
  • Jung, Han-Gyun (Mobility Platform Center, Korea Electronics Technology Institute) ;
  • Jin, Seong-Keun (Mobility Platform Center, Korea Electronics Technology Institute) ;
  • Lim, Ki-Taeg (Mobility Platform Center, Korea Electronics Technology Institute)
  • 장수현 (전자부품연구원 모빌리티플랫폼연구센터) ;
  • 신대교 (전자부품연구원 모빌리티플랫폼연구센터) ;
  • 윤상훈 (전자부품연구원 모빌리티플랫폼연구센터) ;
  • 정한균 (전자부품연구원 모빌리티플랫폼연구센터) ;
  • 진성근 (전자부품연구원 모빌리티플랫폼연구센터) ;
  • 임기택 (전자부품연구원 모빌리티플랫폼연구센터)
  • Received : 2016.11.29
  • Accepted : 2016.12.26
  • Published : 2017.04.30
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Abstract

Recently, the demand has continued to increase for higher data rates and improved multimedia services through wireless internet access. In order to increase the data rate and link reliability, 3GPP LTE/A and IEEE 802.16e/m WiMAX systems incorporate MIMO transmission schemes. Since the hardware complexity increases with the number of transmit data streams and mobile devices have limited physical dimensions, an multiple input multiple output (MIMO) ystem with two antennas at both the transmitter and the receiver ($2{\times}2$) is considered to be a possible solution for mobile devices. In this paper, a low-complexity soft output MIMO symbol detector based on Modified-SQRD is proposed for mobile devices with two transmit and two receive antennas.

최근 모바일 환경에서 고화질 멀티미디어 서비스 수요가 늘어감에 따라, 다중안테나(MIMO, Multiple-Input Multiple-Output) 시스템에 대한 연구가 활발히 진행되고 있으며, 최신 무선 통신 시스템에 적용되고 있다. 이와 함께, 휴대폰, 테블릿 등 모바일 디바이스용 MIMO 시스템은 물리적 크기의 한계로 인하여 최대 2개의 송수신 안테나($2{\times}2$)를 고려하고 있으며, 따라서 본 논문에서도 $2{\times}2$ MIMO 시스템을 고려하여 모바일 디바이스용 다중안테나 시스템을 위한 저복잡도 특성을 갖는 심볼 검출 알고리즘을 제안한다. 제안된 심볼 검출 기법은 비록 Modified-SQRD 알고리즘을 통해 검출된 1차원 상의 신호를 제안된 심볼 확장 기법을 통해 2차원 신호로 확장한 다음 연판정을 위한 LLR 연산이 가능하도록 제안하였다.

Keywords

References

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