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

  • 제35권7A호
  • /
  • Pages.731-742
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  • 2010
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

On the Performance of Incremental Opportunistic Relaying with Differential Modulation over Rayleigh Fading Channels

  • 보 웬 옥 바오 (울산대학교 전기전자정보통신시스템공학부 무선통신실험실) ;
  • 공형윤 (울산대학교 전기전자정보통신시스템공학부 무선통신실험실)
  • 투고 : 2009.12.24
  • 심사 : 2010.07.07
  • 발행 : 2010.07.31
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초록

We propose an incremental relaying protocol in conjunction with opportunistic communication for differential modulation with an aim to make efficient use of the degrees of freedom of the channels by exploiting a imited feedback signal from the destination. In particular, whenever the direct link from the source to the destination is not favorable to decoding, the destination will request the help from the opportunistic relay (if any). The performance of the proposed system is derived in terms of average bit error probability and achievable spectral efficiency. The analytic results show that the system assisted by the opportunistic relaying can achieve full diversity at low SNR regime and exhibits a 30㏈ gain relative to direct transmission, assuming single-antenna terminals. We also determine the effect of power allocation on the bit error probability BEP) performance of our relaying scheme. We conclude with a discussion on the relationship between the given thresholds and channel resource savings. Monte-Carlo simulations are performed to verify the analysis.

키워드

참고문헌

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