한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제33권4A호
  • /
  • Pages.426-433
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  • 2008
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  • 1226-4717(pISSN)
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  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

Quasi-Orthogonal STBC with Iterative Decoding in Bit Interleaved Coded Modulation

  • 성창경 (삼성전자) ;
  • 김지훈 (고려대학교 전기전자전파공학부 무선통신연구실) ;
  • 이인규 (고려대학교 전기전자전파공학부 무선통신연구실)
  • 발행 : 2008.04.30
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초록

In this paper, we present a method to improve the performance of the four transmit antenna quasi-orthogonal space-time block code (STBC) in the coded system. For the four transmit antenna case, the quasi-orthogonal STBC consists of two symbol groups which are orthogonal to each other, but intra group symbols are not. In uncoded system with the matched filter detection, constellation rotation can improve the performance. However, in coded systems, its gain is absorbed by the coding gain especially for lower rate code. We propose an iterative decoding method to improve the performance of quasi-orthogonal codes in coded systems. With conventional quasi-orthogonal STBC detection, the joint ML detection can be improved by iterative processing between the demapper and the decoder. Simulation results shows that the performance improvement is about 2dB at 1% frame error rate.

키워드

참고문헌

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