Outage Analysis of Decode-and-Forward Cognitive Dual-Hop Systems With the Interference Constraint in Nakagami-$m$ Fading Channels
Outage Analysis of Decode-and-Forward Cognitive Dual-Hop Systems With the Interference Constraint in Nakagami-$m$ Fading Channels
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DOI：
10.1109/tvt.2011.2159256
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发表时间：
2011-07
影响因子：
6.8
通讯作者：
C. Zhong;T. Ratnarajah;Kai‐Kit Wong
中科院分区：
文献类型：
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作者：
C. Zhong;T. Ratnarajah;Kai‐Kit Wong
该文研究了Nakagami-m衰落信道下，考虑干扰温度限制的解码转发认知双跳系统的中断概率性能。推导了中断概率的精确表达式，并研究了干扰温度和衰落严重度等关键系统参数对中断概率的影响。研究结果表明，干扰温度约束导致中断饱和现象，但当次级传输链路的信道质量提高时，中断性能得到改善。然而，干扰链路的信道质量如何影响中断性能取决于辅助传输链路的信道质量，以及干扰温度约束和最大发射功率。
This paper studies the outage probability performance of decode-and-forward (DF) cognitive dual-hop systems for Nakagami-m fading channels, with consideration of an interference temperature limit. An exact outage probability expression is derived, and the impact of various key system parameters, such as interference temperature and fading severity, is investigated. Our results show that the interference temperature constraint causes the outage saturation phenomenon, but the outage performance gets better when the channel quality of the secondary transmission links improves. However, how the channel quality of the interfering links affects the outage performance depends on the channel quality of the secondary transmission links, as well as the interference temperature constraint and maximum transmit power.