论文标题
Nakagami-M环境中RIS辅助网络的性能分析和优化
Performance Analysis and Optimization of RIS-Assisted Networks in Nakagami-m Environment
论文作者
论文摘要
这项工作研究并优化了Nakagami-M褪色环境中可重构智能表面（RIS）辅助网络的性能。首先，得出了通道分布的准确闭合近似值。然后，获得了系统中断概率，平均符号误差概率（ASEP）和通道容量的封闭式公式。此外，我们提供了三种不同的优化方法，以找到最佳的反射元素数量以实现目标中断概率。在高信噪比（SNR）方向上，获得了渐近中断概率的闭合形式表达，以提供更多的了解系统性能。结果表明，所考虑的系统可以达到（A+1）/2的多样性顺序，其中A是Nakagami-M褪色参数M的函数，并且反射元素的数量N。此外，发现M对多样性的影响更大。最后，所实现的表达式适用于M和任何数量的Meta-Sura-Sura-Sura-Sura-Sura-Surface sura-sura-surface sura-surface sura-surface sura-surface sura-surfaceerface sura-surface sura-surface sura-surfaceerface n. n。
This work studies and optimizes the performance of reconfigurable intelligent surface (RIS)-aided networks in Nakagami-m fading environment. First, accurate closed-form approximations for the channel distributions are derived. Then, closed-form formulas for the system outage probability, average symbol error probability (ASEP), and the channel capacity are obtained. Furthermore, we provide three different optimization approaches for finding the optimum number of reflecting elements to achieve a target outage probability. At the high signal-to-noise ratio (SNR) regime, a closed-form expression for the asymptotic outage probability is obtained to give more insights into the system performance. Results show that the considered system can achieve a diversity order of (a+1)/2, where a is a function of the Nakagami-m fading parameter m and the number of reflecting elements N. Moreover, findings show that m is more influential on the diversity order than N. Finally, the achieved expressions are applicable to non-integer values of m and any number of meta-surface elements N.
