Secure Cognitive Reactive Decode-and-Forward Relay Networks: With and Without Eavesdropper

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• 作者：Dac-Binh Ha ; Tung Thanh Vu ; Tran Trung Duy…
• 关键词：Underlay cognitive radio ; Reactive relay selection ; Physical ; layer security ; Channel capacity ; Secrecy capacity
• 刊名：Wireless Personal Communications
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：85
• 期：4
• 页码：2619-2641
• 全文大小：915 KB
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• 作者单位：Dac-Binh Ha (1)
  Tung Thanh Vu (1)
  Tran Trung Duy (2)
  Vo Nguyen Quoc Bao (2)
  
  1. Duy Tan University, Da Nang, Vietnam
  2. Posts and Telecommunications Institute of Technology, Hochiminh city, Vietnam
  
• 刊物类别：Engineering
• 刊物主题：Electronic and Computer Engineering
  Signal,Image and Speech Processing
  Processor Architectures
  
• 出版者：Springer Netherlands
• ISSN：1572-834X

文摘

In this paper, we study performances of cooperative relay networks in cognitive radio with reactive multiple decode-and-forward (DF) relays. In particular, we first derive exact and asymptotic expressions of outage probability for the considered scheme with K-th best relay selection over Rayleigh fading channel. Next, in the presence of an eavesdropper and the same relay selection scheme, secrecy performance of the cognitive relay network is also evaluated, in terms of average secrecy capacity. We then perform Monte-Carlo simulations to verify the theoretical derivations. Our results have presented the significance of using relay networks to enhance the system and secrecy performance of cognitive reactive DF relay networks. Keywords Underlay cognitive radio Reactive relay selection Physical-layer security Channel capacity Secrecy capacity