Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Exact Outage Probability Analysis of Proactive Relay Selection in Cognitive Radio Networks with MRC Receivers

  • Ho-Van, Khuong (Department of Telecommunications Engineering, HoChiMinh City University of Technology)
  • Received : 2015.06.14
  • Accepted : 2015.10.21
  • Published : 2016.06.30
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Abstract

Proactive relay selection in cognitive radio networks has recently received considerable attention. However, its outage probability analysis is limited to partially-identical fading distributions, uncorrelation among received signal-to-noise ratios (SNRs), and no direct channel. This paper completes this literature deficiency by generalizing the existing analysis for non-identical fading distributions, correlation among received SNRs, and with direct channel. Numerous results demonstrate that relay selection with a direct channel achieves a higher diversity order and superior performance than that without a direct channel at virtually no cost of power and bandwidth. Further, proactive relay selection suffers an error floor at either a large maximum transmit power or large maximum interference power; however, the error floor level can be significantly remedied with an increase in the number of relays.

Keywords

Acknowledgement

Supported by : Vietnam National Foundation for Science and Technology Development (NAFOSTED)

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