Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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On Performance Evaluation of Hybrid Decode-Amplify-Forward Relaying Protocol with Partial Relay Selection in Underlay Cognitive Networks

  • Duy, Tran Trung (Department of Telecommunications, Posts and Telecommunications Institute of Technology) ;
  • Kong, Hyung Yun (Department of Electrical Engineering, University of Ulsan)
  • Received : 2013.01.02
  • Accepted : 2013.12.05
  • Published : 2014.10.31
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Abstract

In this paper, we evaluate performance of a hybrid decode-amplify-forward relaying protocol in underlay cognitive radio. In the proposed protocol, a secondary relay which is chosen by partial relay selection method helps a transmission between a secondary source and a secondary destination. In particular, if the chosen relay decodes the secondary source's signal successfully, it will forward the decoded signal to the secondary destination. Otherwise, it will amplify the signal received from the secondary source and will forward the amplified signal to the secondary destination. We evaluate the performance of our scheme via theory and simulation. Results show that the proposed protocol outperforms the amplify-and-forward and decode-and-forward protocols in terms of outage probability.

Keywords

Acknowledgement

Supported by : University of Ulsan

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