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Impact of antenna correlation on the performance of partial relay selection

机译:天线相关性对部分中继选择性能的影响

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摘要

Antenna correlation is generally viewed as an obstacle to realize the desired performance of a wireless system. In this article, we investigate the performance of partial relay selection in the presence of antenna correlation. We consider both channel state information (csi)-assisted and fixed gain amplify-and-forward (AF) relay schemes. The source and the destination are equipped with multiple antennas communicating via the best first hop signal-to-noise ratio (SNR) relay. We derived the closed form expression for outage probability, average symbol error rate (SER) for both schemes. Further, an exact expression is derived for the ergodic capacity in the csi-assisted relay case and an approximated expression is considered for the fixed gain case. Moreover, we provide simple asymptotic results and show that the diversity order of the system remains unchanged with the effect of antenna correlation for both types of relay schemes.
机译:通常将天线相关性视为实现无线系统所需性能的障碍。在本文中,我们研究了存在天线相关性时部分中继选择的性能。我们考虑了信道状态信息(csi)辅助和固定增益放大转发(AF)中继方案。源和目标配备有多个天线,这些天线通过最佳的第一跳信噪比(SNR)中继进行通信。我们推导了两种方案的中断概率,平均符号错误率(SER)的封闭式表达式。此外,在csi辅助中继情况下得出了遍历容量的精确表达式,在固定增益情况下考虑了近似表达式。此外,我们提供了简单的渐近结果,并表明在两种中继方案的天线相关性影响下,系统的分集阶数保持不变。

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