Opportunistic Cooperative Communication in the Presence of Co-Channel Interferences and Outdated Channel Information
Opportunistic Cooperative Communication in the Presence of Co-Channel Interferences and Outdated Channel Information
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DOI：
10.1109/lcomm.2013.090213.131493
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发表时间：
2013-09
期刊：
影响因子：
--
通讯作者：
Yanju Gu;S. Ikki;S. Aïssa
中科院分区：
文献类型：
--
作者：
Yanju Gu;S. Ikki;S. Aïssa
本文研究了实际工作环境中的两个主要问题--同频干扰和过时的信道状态信息（CSI）对机会解码转发协作网络性能的影响。首先推导了终端接收机有效信干噪比的分布函数。然后，获得了错误概率和中断概率的精确闭合形式表达式。此外，简单的渐近表达式的错误概率，明确显示的编码和多样性增益，推导和讨论。特别是，它表明，系统的分集阶数减少到单位时，CSI是过时的，并为零时，干扰能量与信号能量的比率是恒定的。
This paper investigates the impacts of co-channel interference and outdated channel state information (CSI), two main issues in practical operating environment, on the performance of opportunistic decode-and-forward cooperative networks. First, the distribution function of the effective signal-to-interference-plus-noise ratio at the end receiver is derived. Then, exact closed-form expressions for the error and outage probabilities are obtained. Furthermore, simple asymptotic expressions for the error probability, which explicitly show the coding and the diversity gains, are derived and discussed. In particular, it is demonstrated that the diversity order of the system is reduced to unity when CSI is outdated, and to zero when the ratio of the interference energy to the signal energy is constant.