Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Maximum Diversity Achieving Decoders in MIMO Decode-and-Forward Relay Systems with Partial CSI

  • Jin, Xianglan (Department of Information and Communication Engineering, Dongguk University-Seoul) ;
  • Kum, Eun-Ji (Department of Information and Communication Engineering, Dongguk University-Seoul) ;
  • Lim, Dae-Woon (Department of Information and Communication Engineering, Dongguk University-Seoul)
  • Received : 2013.05.30
  • Accepted : 2013.11.08
  • Published : 2014.02.28
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Abstract

We consider multiple-input multiple-output decode-and-forward relay systems in Rayleigh fading channels under the partial channel state information (CSI) that the channel statistics of the source-relay (SR) link and the instantaneous CSI of the source-destination and relay-destination links are known at the destination. In this paper, we propose a new near maximum likelihood (near-ML) decoder with two-level pairwise error probability (near-ML-2PEP) which uses the average PEP instead of the exact PEP. Then, we theoretically prove that the near-ML and near-ML-2PEP decoders achieve the maximum diversity, which is confirmed by Monte Carlo simulations. Moreover, we show that the near-ML-2PEP decoder can also achieve the maximum diversity by substituting the average PEP with the values that represent the error performance of the SR link.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea

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