Performance Analysis of Cognitive Relay Networks under Power Constraint of Multiple Primary Users
Performance Analysis of Cognitive Relay Networks under Power Constraint of Multiple Primary Users
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DOI：
10.1109/glocom.2011.6133587
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
Hung Tran;T. Duong;H. Zepernick
中科院分区：
文献类型：
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作者：
Hung Tran;T. Duong;H. Zepernick
认知中继是一种很有前途的技术，以提高频谱利用率的移动的网络。在本文中，我们考虑一个场景，其中一个二次发射机与一个二次接收机通信的帮助下，一个二次中继。次用户应该调整其传输功率，以便不对在许可频谱中操作的多个主用户造成任何有害干扰。在这种情况下，我们调查的中断概率和遍历容量在Nakagami-m衰落信道的认知中继网络的端到端的性能。推导了中断概率的封闭表达式和遍历容量的近似表达式。此外，所提出的数值例子说明了主用户的数量对认知中继网络的性能的影响。
Cognitive relaying is a promising technique to improve spectrum utilization in mobile networks. In this paper, we consider a scenario in which a secondary transmitter communicates with a secondary receiver by the help of a secondary relay. The secondary user should adjust its transmission power in order to not cause any harmful interference to the multiple primary users operating in the licensed spectrum. In this context, we investigate the end-to-end performance of cognitive relay networks in terms of outage probability and ergodic capacity over Nakagami-m fading channels. A closed-form expression for outage probability and an approximation for ergodic capacity are derived. Furthermore, the presented numerical examples illustrate the impact of the number of primary users on the performance of cognitive relay networks.