RIS-协助上链接通信快速光束培训 (Fast Beam Training for RIS-Assisted Uplink Communication)

from arxiv, This is codebook for single user case in RIS-assisted uplink communication. We have introduced fine correction in last stage of beam training

In this work, we propose a beam training codebook for Reconfigurable Intelligent Surface (RIS) assisted mmWave uplink communication. Beam training procedure is important to establish a reliable link between user node and Access point (AP). A codebook based training procedure reduces the search time to obtain best possible phase shift by RIS controller to align incident beam at RIS in the direction of receiving node. We consider a semi passive RIS to assist RIS controller with a feedback of minimum overhead. It is shown that the procedure detects a mobile node with high probability in a short interval of time. Further we use the same codebook at user node to know the desired direction of communication via RIS.

翻译：在这项工作中,我们提议为重新配置智能表面(RIS)协助的 mm Wave 上行链接通信建立一个波束培训手册。波束培训程序对于在用户节点和接入点之间建立可靠的联系十分重要。基于代码手册的培训程序减少了搜索时间,以便通过RIS控制器尽可能最佳地进行阶段转移,将RIS的事故波束与接收节点的方向相协调。我们考虑使用半被动的RIS来协助RIS控制器对最低间接费用进行反馈。我们发现程序在很短的时间内探测到一个概率很高的移动节点。我们还在用户节点使用同样的代码手册了解通过RIS进行沟通的预期方向。