论文标题
零通过大规模RIS强迫上行链路检测：系统性能和相移设计
Zero Forcing Uplink Detection through Large-Scale RIS: System Performance and Phase Shift Design
论文作者
论文摘要
分析研究了多输入多输出无线通信系统，该系统借助大规模的可重构智能表面（LRIS）运行。 LRI配备了具有离散相调整功能的多个被动元件，并且假定发射机到LRI和LRIS到接收器的链接都假定独立的RICIAN褪色条件。还考虑了直接收发器链接，该链接是通过雷利褪色分布来建模的。当在接收器上实现线性但有效的零孔检测时，对系统性能进行了分析研究。特别是，与接收器的可用通道状态信息（CSI）有关不同系统配置设置的封闭形式表达式的中断性能。实际上，分析了完美和不完美的CSI的情况。同样，引入了LRIS的有效相移设计方法，该方法是根据被动元素的数量线性和接收天线的线性。提出的相移设计可以应用于两种不同的操作模式。也就是说，当系统努力适应瞬时或统计CSI时。最后，提供了一些有影响力的工程见解，例如频道褪色条件，CSI，离散相位移位分辨率以及天线/LRIS元件阵列的体积如何影响整体系统性能。
A multiple-input multiple-output wireless communication system is analytically studied, which operates with the aid of a large-scale reconfigurable intelligent surface (LRIS). LRIS is equipped with multiple passive elements with discrete phase adjustment capabilities, and independent Rician fading conditions are assumed for both the transmitter-to-LRIS and LRIS-to-receiver links. A direct transceiver link is also considered which is modeled by Rayleigh fading distribution. The system performance is analytically studied when the linear yet efficient zero-forcing detection is implemented at the receiver. In particular, the outage performance is derived in closed-form expression for different system configuration setups with regards to the available channel state information (CSI) at the receiver. In fact, the case of both perfect and imperfect CSI is analyzed. Also, an efficient phase shift design approach at LRIS is introduced, which is linear on the number of passive elements and receive antennas. The proposed phase shift design can be applied on two different modes of operation; namely, when the system strives to adapt either on the instantaneous or statistical CSI. Finally, some impactful engineering insights are provided, such as how the channel fading conditions, CSI, discrete phase shift resolution, and volume of antenna/LRIS element arrays impact on the overall system performance.
