论文标题
渠道模型对RIS辅助无线系统性能表征的影响
Impact of Channel Models on Performance Characterization of RIS-Assisted Wireless Systems
论文作者
论文摘要
由大型重新配置智能表面（RISS）辅助的通信系统的性能表征显着取决于基础渠道所采用的模型。在不切实际的渠道模型下，系统性能可能会被过度估计，这对系统设计产生了不准确的结论。在本文中，我们回顾了五个渠道模型，这些模型被选为逐步提高大RIS的建模准确性。对于每个频道模型，我们强调了基本假设，其优势及其局限性。我们使用文献中的RIS配置算法和本文中提出的新的可伸缩算法比较了上述通道模型下的系统性能，专门针对非常大的RISS进行配置。
The performance characterization of communication systems assisted by large reconfigurable intelligent surfaces (RISs) significantly depends on the adopted models for the underlying channels. Under unrealistic channel models, the system performance may be over- or under-estimated which yields inaccurate conclusions for the system design. In this paper, we review five channel models that are chosen to progressively improve the modeling accuracy for large RISs. For each channel model, we highlight the underlying assumptions, its advantages, and its limitations. We compare the system performance under the aforementioned channel models using RIS configuration algorithms from the literature and a new scalable algorithm proposed in this paper specifically for the configuration of extremely large RISs.
