论文标题
与星际辅助大规模MIMO系统具有相关性和相误差的覆盖范围概率
Coverage Probability of STAR-RIS assisted Massive MIMO systems with Correlation and Phase Errors
论文作者
论文摘要
在本文中，我们研究了一个同时传输和反映可重新配置的智能表面（Star-ris），以帮助大规模多输入多输出（MMIMO）系统。特别是，我们得出了一个封闭式表达，以在考虑相关的褪色和相移误差的同时，以覆盖星形辅助MMIMO系统的覆盖范围。值得注意的是，相位配置在每几个连贯间隔内进行优化，因为后者根据大规模统计量取决于统计通道状态信息（CSI）。结果，我们实现了降低的复杂性和开销，以优化被动边界的成形，在使用瞬时CSI的星际网络中，这会增加。数值结果证实了我们的分析，阐明了有趣的特性，例如RIS元素数量的影响以及相误差的效果，并确认了星际 - RIS的优势与仅反射性的RIS的优势。
In this paper, we investigate a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisting a massive multiple-input multiple-output (mMIMO) system. In particular, we derive a closed-form expression for the coverage probability of a STAR-RIS assisted mMIMO system while accounting for correlated fading and phase-shift errors. Notably, the phase configuration takes place at every several coherence intervals by optimizing the coverage probability since the latter depends on statistical channel state information (CSI) in terms of large-scale statistics. As a result, we achieve a reduced complexity and overhead for the optimization of passive beamforming, which are increased in the case of STAR-RIS networks with instantaneous CSI. Numerical results corroborate our analysis, shed light on interesting properties such as the impact of the number of RIS elements and the effect of phase errors, along with affirming the superiority of STAR-RIS against reflective-only RIS.
