论文标题
主动和被动的IRS共同辅助沟通：部署设计和可实现的速度
Active and Passive IRS Jointly Aided Communication: Deployment Design and Achievable Rate
论文作者
论文摘要
在这封信中，我们研究了从发射机（TX）到接收器（RX）的无线点对点通信，该通信由主动智能反射表面（AIRS）和被动IRS（PIRS）共同帮助。我们通过以不同的订单部署两个IRS来考虑两种实用的传输方案，即TX $ \ rightarrow $ pirs $ \ rightarrow $ airs $ \ rightarrow $ rx（tpar）和tx $ \ rightarrow $ \ rightarrow $ airs $ \ airs $ \ rightarrow $ pirs $ pirs $ \ rightarrow $ rx（tapr）。假设有视线通道，我们通过优化固定的PIR的位置来优化空气的位置，从而得出了两个方案的可实现率。我们的分析表明，当PIRS元素的数量和/或AIRS放大功率较小时，应在这两个方案中都将空气靠近RX，并且TAPR的表现优于TPAR，其各自优化的Airs/Pirs放置。仿真结果验证了我们的分析，并显示了在相同的功率和IRS元素预算下，联合优化的AIRS/PIRS部署在基线双PIRS系统上所获得的可观性能增益。
In this letter, we study the wireless point-to-point communication from a transmitter (Tx) to a receiver (Rx), which is jointly aided by an active intelligent reflecting surface (AIRS) and a passive IRS (PIRS). We consider two practical transmission schemes by deploying the two IRSs in different orders, namely, Tx$\rightarrow$PIRS$\rightarrow$AIRS$\rightarrow$Rx (TPAR) and Tx$\rightarrow$AIRS$\rightarrow$PIRS$\rightarrow$Rx (TAPR). Assuming line-of-sight channels, we derive the achievable rates for the two schemes by optimizing the placement of the AIRS with the location of the PIRS fixed. Our analysis shows that when the number of PIRS elements and/or the AIRS amplification power is small, the AIRS should be deployed closer to the Rx in both schemes, and TAPR outperforms TPAR with their respective optimized AIRS/PIRS placement. Simulation results validate our analysis and show the considerable performance gain achieved by the jointly optimized AIRS/PIRS deployment over the baseline double-PIRS system under the same power and IRS element budgets.
