论文标题
智能反射表面辅助多源系统的空间吞吐量表征
Spatial Throughput Characterization for Intelligent Reflecting Surface Aided Multiuser System
论文作者
论文摘要
最近，已提出智能反射表面（IRS）作为一种有希望的解决方案，以通过调整大量的低成本被动反射元件并构建有利的无线传播环境，从而提高未来无线网络的光谱和能源效率。与以IRS辅助无线系统的链接级性能优化为重点的先前作品不同，该字母是由多个由随机部署在单元格中随机部署的IRS的单细胞多源系统的空间吞吐量。通过模拟表明，我们的分析是有效的，而IRS辅助系统则优于当IRS超过一定值时的空间吞吐量，超过了全双工中继的对应系统。此外，可以表明，应采用不同的IRS/主动继电器部署策略，以使其各自的吞吐量最大化。最后，据透露，鉴于IRS的反射元素的总数，当将较少的IRS部署到每个人的情况下以更大的反射元素部署时，系统空间吞吐量会增加，但以空间变化的用户速率成本更大。
Intelligent Reflecting Surface (IRS) has been recently proposed as a promising solution to enhance the spectral and energy efficiency of future wireless networks by tuning a massive number of low-cost passive reflecting elements and thereby constructing favorable wireless propagation environment. Different from the prior works that focus on link-level performance optimization for IRS-aided wireless systems, this letter characterizes the spatial throughput of a single-cell multiuser system aided by multiple IRSs that are randomly deployed in the cell. It is shown by simulation that our analysis is valid and the IRS-aided system outperforms the full-duplex relay-aided counterpart system in terms of spatial throughput when the number of IRSs exceeds a certain value. Moreover, it is shown that different deploying strategies for IRSs/active relays should be adopted for their respective throughput maximization. Finally, it is revealed that given the total number of reflecting elements for IRSs, the system spatial throughput increases when fewer IRSs are deployed each with more reflecting elements, but at the cost of more spatially varying user rates.
