Performance Analysis of Intelligent Reflecting Surface Aided Communication Systems
Performance Analysis of Intelligent Reflecting Surface Aided Communication Systems
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DOI：
10.1109/lcomm.2020.3011843
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
Qin Tao;Junwei Wang;C. Zhong
中科院分区：
文献类型：
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作者：
Qin Tao;Junwei Wang;C. Zhong
这封信介绍了智能反射表面（IRS）辅助单输入单输出通信系统的详细性能分析，考虑了发射器和接收器之间的直接链路。导出了遍历容量的封闭形式上限，并获得了停电概率的精确近似值。此外，在渐进机制中还给出了简化的表达式。提供数值结果来验证理论分析的正确性。研究发现，增加反射元件的数量可以显着提高遍历容量和停电概率性能，并且强大的视距元件也是有益的。此外，最好将 IRS 部署在靠近发射器或接收器的位置，而不是中间。
This letter presents a detailed performance analysis of the intelligent reflecting surface (IRS) aided single-input single-output communication systems, taking into account of the direct link between the transmitter and receiver. A closed-form upper bound is derived for the ergodic capacity, and an accurate approximation is obtained for the outage probability. In addition, simplified expressions are presented in the asymptotic regime. Numerical results are provided to validate the correctness of the theoretical analysis. It is found that increasing the number of reflecting elements can significantly boost the ergodic capacity and outage probability performance, and a strong line-of-sight component is also beneficial. In addition, it is desirable to deploy the IRS close to the transmitter or receiver, rather than in the middle.