Channel Estimation in RIS-Enabled mmWave Wireless Systems: A Variational Inference Approach

no code implementations • 25 Aug 2023 • Firas Fredj, Amal Feriani, Amine Mezghani, Ekram Hossain

In RIS-aided systems, channel estimation involves estimating two channels for the user-RIS (UE-RIS) and RIS-base station (RIS-BS) links.

Variational Inference

Distributed Uplink Beamforming in Cell-Free Networks Using Deep Reinforcement Learning

no code implementations • 26 Jun 2020 • Firas Fredj, Yasser Al-Eryani, Setareh Maghsudi, Mohamed Akrout, Ekram Hossain

First, we propose a fully centralized beamforming method that uses the deep deterministic policy gradient algorithm (DDPG) with continuous space.

reinforcement-learning Reinforcement Learning (RL)