Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A Robust Receiver for Generalized Spatial Modulation under Channel Information Errors

채널 정보 오차에 강인한 일반화 공간변조 수신기

  • Lee, JaeSeong (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Woo, DaeWi (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Jeon, EunTak (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Yoon, SungMin (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Lee, Kyungchun (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
  • Received : 2015.12.01
  • Accepted : 2016.01.04
  • Published : 2016.01.31
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Abstract

In this paper, we develop an iterative maximum likelihood (ML) receiver for generalized spatial modulation systems. In the proposed ML receiver, to mitigate the deleterious effect of channel information errors on symbol detection, the instantaneous covariance matrix of effective noise is estimated, which is then used to obtain improved ML solutions. The estimated covariance matrix is updated through multiple iterations to enhance the estimation accuracy. The simulation results show that the proposed ML receiver outperforms the conventional ML detection scheme, which does not take the effect of channel information errors into account.

본 논문에서는 전체 송신 안테나 중 일부 안테나만을 활성화하여 신호 송신에 사용하는 일반화 공간변조(Generalized Spatial Modulation) 시스템을 위한 최대우도 수신기를 제안한다. 제안 수신기는 신호 검출시 채널 정보 오차의 효과를 완화시키기 위하여 채널 정보 오차로 인해 생성되는 실질 잡음 신호의 순시 공분산 행렬을 추정한다. 추정된 공분산 행렬은 검출 정확도를 높이기 위해 반복수행을 통해 갱신되며, 추정 결과는 최대 우도 검출에 사용된다. 모의 실험 결과에서 기존의 채널 정보 오차를 고려하지 않는 수신기와 비교하여 높은 성능을 얻음을 확인할 수 있다.

Keywords

References

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  2. 일반화 공간변조 시스템에서 채널 정보 오차를 고려한 탐색 영역 분할 수신기 vol.23, pp.12, 2016, https://doi.org/10.6109/jkiice.2019.23.12.1631