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Impact of Phase-Noise and Spatial Correlation on Double-RIS-Assisted Multiuser MISO Networks
IEEE Wireless Communications Letters ( IF 6.3 ) Pub Date : 2022-05-17 , DOI: 10.1109/lwc.2022.3175539 Zaid Abdullah 1 , Anastasios Papazafeiropoulos 2 , Steven Kisseleff 1 , Symeon Chatzinotas 1 , Bjorn Ottersten 1
IEEE Wireless Communications Letters ( IF 6.3 ) Pub Date : 2022-05-17 , DOI: 10.1109/lwc.2022.3175539 Zaid Abdullah 1 , Anastasios Papazafeiropoulos 2 , Steven Kisseleff 1 , Symeon Chatzinotas 1 , Bjorn Ottersten 1
Affiliation
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.
中文翻译:
相位噪声和空间相关性对双 RIS 辅助多用户 MISO 网络的影响
我们研究了相位噪声受损的双可重构智能表面 (RIS) 辅助多用户 (MU) 多输入单输出 (MISO) 系统在 RIS 和基站 (BS) 的空间相关下的性能。在最大比传输 (MRT) 预编码下以封闭形式导出下行链路可实现速率。此外,对于所考虑的通道和相位噪声模型,我们在两个 RIS 上以封闭形式获得了最佳相移设计。数值结果验证了解析表达式,并突出了不同系统参数对可实现速率的影响。我们的分析表明,当用户没有与两个 RIS 的直接链接并且只能通过双反射链接提供服务时,相位噪声会严重降低性能。还,
更新日期:2022-05-17
中文翻译:
相位噪声和空间相关性对双 RIS 辅助多用户 MISO 网络的影响
我们研究了相位噪声受损的双可重构智能表面 (RIS) 辅助多用户 (MU) 多输入单输出 (MISO) 系统在 RIS 和基站 (BS) 的空间相关下的性能。在最大比传输 (MRT) 预编码下以封闭形式导出下行链路可实现速率。此外,对于所考虑的通道和相位噪声模型,我们在两个 RIS 上以封闭形式获得了最佳相移设计。数值结果验证了解析表达式,并突出了不同系统参数对可实现速率的影响。我们的分析表明,当用户没有与两个 RIS 的直接链接并且只能通过双反射链接提供服务时,相位噪声会严重降低性能。还,