论文标题
IRSS应该如何扩展多个Antenna通道？
How Should IRSs Scale to Harden Multi-Antenna Channels?
论文作者
论文摘要
这项工作将通道硬化的概念扩展到了由智能反射表面（IRSS）提供帮助的多端纳系统。对于多Antenna发射机和单端纳接收器之间的衰落链接，当反射元件的数量增长时，我们得出了一个准确的输入输出共同信息分布的近似值。渐近结果表明，通过增加IR的元素数量，只要IRS的物理尺寸也会增长，端到端通道就会硬化。但是，增长率不必是特定的秩序，并且可以显着下线。分析结果的有效性通过数值实验证实。
This work extends the concept of channel hardening to multi-antenna systems that are aided by intelligent reflecting surfaces (IRSs). For fading links between a multi-antenna transmitter and a single-antenna receiver, we derive an accurate approximation for the distribution of the input-output mutual information when the number of reflecting elements grows large. The asymptotic results demonstrate that by increasing the number of elements on the IRS, the end-to-end channel hardens as long as the physical dimensions of the IRS grow as well. The growth rate however need not to be of a specific order and can be significantly sub-linear. The validity of the analytical result is confirmed by numerical experiments.
