论文标题
有限元素辅助通信系统中能源效率的中断分析
Outage Analysis of Energy Efficiency in a Finite-Element-IRS Aided Communication System
论文作者
论文摘要
在本文中，我们研究了能节能无线通信系统的性能，并在有限的元素反射表面（IRS）的帮助下。在发射器上没有瞬时通道状态信息（CSI），我们根据能源效率（EE）的中断概率（OP）来表征系统性能。根据视线（LOS）路径的可用性，我们分析了两个不同的通道模型的系统。里奇亚人和雷利。对于任意数量的IRS元素$（n）$，我们使用laguerre系列和力矩匹配方法得出了EE OP的近似闭合解决方案。使用蒙特 - 卡洛模拟验证了分析结果。此外，我们还使用\ textit {Berry-Esseen}不等式量化了派生表达式对中心限制定理（CLT）近似的收敛速率。此外，我们证明EE的OP是发射功率的严格伪符号函数，因此具有独特的全球最小值。为了获得最佳发射功率，我们将EE的OP求解为受约束的优化问题。据我们所知，EE作为性能指标的OP以前从未在IRS辅助无线通信系统中进行过研究。
In this paper, we study the performance of an energy efficient wireless communication system, assisted by a finite-element-intelligent reflecting surface (IRS). With no instantaneous channel state information (CSI) at the transmitter, we characterize the system performance in terms of the outage probability (OP) of energy efficiency (EE). Depending upon the availability of line-of-sight (LOS) paths, we analyze the system for two different channel models, viz. Rician and Rayleigh. For an arbitrary number of IRS elements $(N)$, we derive the approximate closed-form solutions for the OP of EE, using Laguerre series and moment matching methods. The analytical results are validated using the Monte-Carlo simulations. Moreover, we also quantify the rate of convergence of the derived expressions to the central limit theorem (CLT) approximations using the \textit{Berry-Esseen} inequality. Further, we prove that the OP of EE is a strict pseudo-convex function of the transmit power and hence, has a unique global minimum. To obtain the optimal transmit power, we solve the OP of EE as a constrained optimization problem. To the best of our knowledge, the OP of EE as a performance metric, has never been previously studied in IRS-assisted wireless communication systems.
