论文标题
相位 - 噪声和空间相关性对双线辅助的多源味o网络的影响
Impact of Phase-Noise and Spatial Correlation on Double-RIS-Assisted Multiuser MISO Networks
论文作者
论文摘要
我们研究了在RISS和BASE-Station（BS）的空间相关性下，相位相关性（BS）下，相关的双相位噪声障碍障碍的双重可重新配置智能表面（RIS）辅助表面（MU）多输入单输出（MISO）系统的性能。在最大比率传输（MRT）预编码下，下行链路可实现的速率以封闭形式得出。此外，我们在封闭形式的封闭形式和相位噪声模型的封闭形式中获得了最佳的相移设计。数值结果验证了分析表达式，并强调了不同系统参数对可实现速率的影响。我们的分析表明，当用户没有直接链接到RISS时，相位噪声可以严重降低性能，并且只能通过双重反射链接提供。另外，我们表明，RISS处的高空间相关对于高可实现的速率至关重要。
We study the performance of a phase-noise impaired double reconfigurable intelligent surface (RIS)-aided multiuser (MU) multiple-input single-output (MISO) system under spatial correlation at both RISs and base-station (BS). The downlink achievable rate is derived in closed-form under maximum ratio transmission (MRT) precoding. In addition, we obtain the optimal phase-shift design at both RISs in closed-form for the considered channel and phase-noise models. Numerical results validate the analytical expressions, and highlight the effects of different system parameters on the achievable rate. Our analysis shows that phase-noise can severely degrade the performance when users do not have direct links to both RISs, and can only be served via the double-reflection link. Also, we show that high spatial correlation at RISs is essential for high achievable rates.
