Outage Probability of Cooperative Relay Networks in Two-Wave with Diffuse Power Fading Channels
Outage Probability of Cooperative Relay Networks in Two-Wave with Diffuse Power Fading Channels
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DOI：
10.1109/tcomm.2011.111011.100290
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发表时间：
2012
影响因子：
8.3
通讯作者：
Yao Lu;Xiaoxiang Wang;Nan Yang
中科院分区：
文献类型：
--
作者：
Yao Lu;Xiaoxiang Wang;Nan Yang
分析了在双波功率扩散衰落信道中采用自适应解码转发（DF）中继的协作中继网络的性能。在参与传输的多个并行中继中，只有成功解码源消息的中继将信号转发到目的地。在目的地，来自源的直接信号和经由中继的间接信号使用最大比组合（MRC）组合。我们首先推导出一个新的封闭形式的中断概率，其中包括瑞利衰落和莱斯衰落的特殊情况下的表达式。然后，我们推导出一个严格的下界中断概率，以减少计算复杂度。通过蒙特卡罗模拟验证了推导的正确性。结果表明，增加中继的数量降低中断概率在高信噪比（SNR），但增加中断概率在低到中等信噪比。
This paper analyzes the performance of cooperative relay networks using adaptive decode-and-forward (DF) relaying in two-wave with diffuse power (TWDP) fading channels. Among the multiple parallel relays that participate in transmission, only the relays that successfully decode the source message retransmit the signals to the destination. At the destination, the direct signals from the source and the indirect signals via the relays are combined using maximal-ratio combining (MRC). We first derive a new closed-form expression for the outage probability, which encompasses the Rayleigh fading and Rician fading as special cases. We then derive a tight lower bound on the outage probability to reduce computational complexity. The correctness of our derivation is validated through Monte Carlo simulations. It is shown that increasing the number of relays decreases the outage probability at high signal-to-noise ratio (SNR), but increases the outage probability at low to medium SNR.