The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Channel Estimation Using Virtual Pilot Signal for MIMO-OFDM Systems

MIMO-OFDM 시스템을 위한 가상 기준 신호를 이용한 채널 추정 기법

  • Seo, Heejin (School of Electrical and Computer Engineering and Institute of New Media and Communications, Seoul National University) ;
  • Park, Sunho (School of Electrical and Computer Engineering and Institute of New Media and Communications, Seoul National University) ;
  • Kim, Jinhong (School of Electrical and Computer Engineering and Institute of New Media and Communications, Seoul National University) ;
  • Shim, Byonghyo (School of Electrical and Computer Engineering and Institute of New Media and Communications, Seoul National University)
  • 서희진 (서울대학교 전기정보공학부 뉴미디어통신공동연구소) ;
  • 박선호 (서울대학교 전기정보공학부 뉴미디어통신공동연구소) ;
  • 김진홍 (서울대학교 전기정보공학부 뉴미디어통신공동연구소) ;
  • 심병효 (서울대학교 전기정보공학부 뉴미디어통신공동연구소)
  • Received : 2015.10.02
  • Accepted : 2015.12.11
  • Published : 2016.01.31
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Abstract

In this paper, we proposed a soft decision-directed channel estimation based on MMSE estimation for MIMO-OFDM system. While the conventional method employs only pilot signals for channel estimation, the proposed algorithm performs channel estimation using pilot and reliable data signals. We also proposed selection criterion among reliable data signal for channel estimation. From numerical simulations, we show that the proposed channel estimator achieves 1 dB performance gain over conventional channel estimators.

본 논문에서는 다중 입출력 안테나 OFDM 통신시스템에서 가상 기준 신호(virtual pilot signal)를 사용하는 한 연판정 지향 채널 추정 기법을 제안한다. 기준 신호만을 이용하여 채널을 추정하는 기존 방식과 달리 제안하는 기법은 기준 신호와 데이터를 동시에 사용하여 채널을 추정한다. 또한, 제안하는 기법에서 채널을 추정하기 위해 사용할 데이터를 선택하는 알고리즘을 제안한다. 모의실험을 통해 제안하는 기법이 기존 채널 추정에 비해 향상된 성능을 갖는 것을 확인할 수 있다.

Keywords

References

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