Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Cognitive Relay Networks with Underlay Spectrum Sharing and Channel Estimation Error: Interference Probability and BER Analysis

  • Ho-Van, Khuong (Department of Telecommunications Engineering, HoChi-Minh City University of Technology)
  • Received : 2013.06.04
  • Accepted : 2014.01.17
  • Published : 2014.06.30
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Abstract

This paper proposes accurate interference probability and bit error rate formulas for cognitive relay networks with underlay spectrum sharing and channel estimation error (CEE). Numerous results reveal that the CEE not only degrades the performance of secondary systems (SSs) but also increases interference power caused by SSs to primary systems (PSs), eventually unfavorable to both systems. A solution to further protect PSs from this effect through reducing the power of secondary transmitters is investigated and analyzed.

Keywords

Acknowledgement

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

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