Channel Estimation for Reconfigurable-Intelligent-Surface-Aided Multiuser Communication Systems Exploiting Statistical CSI of Correlated RIS–User Channels
总评:框架结构好,文献综述好
introduction:目标是降低pilot length
文献综述:3~10没有考虑信道的准静态。11,12考虑了(11戴)
问题阐述:没有利用spatial correlation between users' antenna and RIS reflect elements
贡献:1beam-domain channel model between RIS and UE
2pilot reuse strategy-- reduce overhead-- decompose to subproblem
3correlated nature --EP algorithm (eigenspace projection)
II.system model
III.channel model这部分写得详细,分每个阶段,每个小部分,写了四个
IV.Uplink Pilot Transmission and Pilot Reuse Scheme
V.algorithm