Exact Outage Performance Analysis of Multiuser Multi-relay Spectrum Sharing Cognitive Networks
作者: T. ZhangW. YangY. Cai
刊名: Radioengineering, 2015, Vol.24 (1), pp.115-121
来源数据库: Directory of Open Access Journals
关键词: Spectrum sharingCognitive relayOutage probabilityDiversity orderCoding gain
原始语种摘要: In this paper, we investigate the outage performance of dual-hop multiuser multi-relay cognitive radio networks under spectrum sharing constraints. Using an efficient relay-destination selection scheme, the exact and asymptotic closed-form expressions for the outage probability are derived. From these expressions it is indicated that the achieved diversity order is only determined by the number of secondary user (SU) relays and destinations, and equals to M+N (where M and N are the number of destination nodes and relay nodes, respectively). Further, we find that the coding gain of the SU network will be affected by the interference threshold $bar I$ at the primary user (PU) receiver. Specifically, as the increases of the interference threshold, the coding gain of the considered network...
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  • 干涉 差异
  • destination 目的
  • relay 继电器
  • sharing 共用
  • outage 断电
  • coding 编码
  • network 网络
  • efficient 有用的
  • diversity 差异
  • interference 差异
  • radio 无线电