Journal of the Institute of Electronics Engineers of Korea SP (대한전자공학회논문지SP)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Hybrid Iterative Detection Algorithm for MIMO Systems

다중 안테나 시스템을 위한 Hybrid Iterative 검출 기법

  • Kim, Sang-Heon (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Shin, Myeong-Cheol (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Kyeong-Yeon (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Lee, Chung-Yong (Department of Electrical and Electronic Engineering, Yonsei University)
  • 김상헌 (연세대학교 전기전자공학과) ;
  • 신명철 (연세대학교 전기전자공학과) ;
  • 김경연 (연세대학교 전기전자공학과) ;
  • 이충용 (연세대학교 전기전자공학과)
  • Published : 2007.07.25
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Abstract

For multiple antenna systems, we consider the hybrid iterative detection of the maximum a posteriori probability(MAP) detection and the linear detection such as the minimum-mean-square-error(MMSE) filtering with soft cancelation. We devise methods to obtain both the lower complexity of the linear detection and the superior performance of the MAP detection. Using the a prior probability of the coded bit which is extrinsic of the outer decoder, we compute the threshold of grouping and determine the detection scheme symbol by symbol. Through the simulation results, it is shown that the proposed receiver obtains the superior performance to the MMSE detector and the lower complexity than the MAP detector.

본 논문에서는 maximum a posteriori probability (MAP) 검출기와 minimum-mean-square-error (MMSE) 필터와 같은 선형 검출기의 hybrid 형태를 갖는, 다중안테나 시스템을 위한 iterative 수신기를 고려한다. MAP검출기의 우수한 성능과 선형 검출기의 낮은 복잡도를 얻기 위해 두 검출기를 한 프레임 내에서 동시에 사용하는 수신기 구조를 제안한다. Outer 코더의 extrinsic 정보인 코드 비트에 대한 a priori probability를 이용하여 검출기를 결정할 수 있는 임계치를 계산하고, 복조 심볼 단위로 결정된 검출기를 적용하여 코드 비트의 검출단에서의 extrinsic 정보를 계산한다. 모의실험 결과를 통해서, 제안된 수신기가 MMSE 수신기보다 우수한 성능을 가지며, MAP 수신기보다 낮은 복잡도를 가짐을 확인하였다.

Keywords

References

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