Outage Probability Gap Between Proactive and Reactive Opportunistic Cognitive Relay Networks

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• 作者：Ping Yang ; Jianxun Song ; Ming Li ; Guobin Zhang
• 关键词：Cognitive relay network ; Relay selection ; Outage probability ; Spectrum sharing
• 刊名：Wireless Personal Communications
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：82
• 期：4
• 页码：2417-2429
• 全文大小：745 KB
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• 作者单位：Ping Yang (1)
  Jianxun Song (1)
  Ming Li (1)
  Guobin Zhang (1)
  
  1. School of Electronic Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, China
  
• 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

For cognitive relay networks (CRNs) where the secondary link contains multiple relays, considering the interference from primary user (PU) and the maximum transmit power constraint at the secondary user, we investigate the exact and asymptotic outage probabilities for both proactive and reactive decode-and-forward (DF) schemes. Unlike the conventional opportunistic relay networks where the outage probabilities for both proactive and reactive DF schemes are the same, it is found that an outage gap of the two schemes does exist for the CRNs. It is shown that the outage gap tends to zero when the interference caused by PU is high enough and the outage gap increases with the increase of the difference between the threshold signal-to-interference-and-noise ratios at relay and destination.