Transactions on Comm. - Journal Paper
L. Wei, C. Huang, G. C. Alexandropoulos, A. M.
Elbir, Z. Yang, C. Yuen, Z. Zhang, M. Di Renzo and M. Debbah
"Channel
estimation for RIS-empowered systems: Model-based vs model-free approaches, and
opportunities,"
IEEE Transactions on Communications, vol. 69, no. 6, pp.
4144–4157, June 2021
https://arxiv.org/abs/2008.01459