Fast Beam Training for RIS-Assisted Uplink Communication

Autor:	Singh, Chandradeep, Singh, Kamal, Liu, K. H.
Rok vydání:	2021
Předmět:	Electrical Engineering and Systems Science - Signal Processing Computer Science - Information Theory
Druh dokumentu:	Working Paper
Popis:	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. Comment: This is codebook for single user case in RIS-assisted uplink communication. We have introduced fine correction in last stage of beam training
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2107.14138 Zobrazit plný text záznamu View this record from Arxiv