Low-Complexity Near-Field Channel Estimation for Hybrid RIS Assisted Systems

no code implementations • 26 Apr 2024 • Rafaela Schroeder, Jiguang He, Hamza Djelouat, Markku Juntti

We investigate the channel estimation (CE) problem for hybrid RIS assisted systems and focus on the near-field (NF) regime.

Two-Stage Channel Estimation for Hybrid RIS Assisted MIMO Systems

no code implementations • 15 Jul 2021 • Rafaela Schroeder, Jiguang He, Glauber Brante, Markku Juntti

Reconfigurable intelligent surfaces (RISs) have been proposed as a key enabler to improve the coverage of the signals and mitigate the frequent blockages in millimeter wave (mmWave) multiple-input multiple-output (MIMO) communications.

Vocal Bursts Valence Prediction

Channel Estimation for Hybrid RIS Aided MIMO Communications via Atomic Norm Minimization

no code implementations • 21 Jun 2021 • Rafaela Schroeder, Jiguang He, Markku Juntti

Reconfigurable intelligent surfaces (RISs) have been introduced as a remedy for mitigating frequent blockages in millimeter wave (mmWave) multiple-input multiple-output (MIMO) communication networks.

Compressive Sensing

Channel Estimation and Hybrid Architectures for RIS-Assisted Communications

no code implementations • 14 Apr 2021 • Jiguang He, Nhan Thanh Nguyen, Rafaela Schroeder, Visa Tapio, Joonas Kokkoniemi, Markku Juntti

Reconfigurable intelligent surfaces (RISs) are considered as potential technologies for the upcoming sixth-generation (6G) wireless communication system.

Passive RIS vs.Hybrid RIS: A Comparative Study on Channel Estimation

no code implementations • 14 Oct 2020 • Rafaela Schroeder, Jiguang He, Markku Juntti

The reconfigurable intelligent surface (RIS) plays an important role in maintaining the connectivity in millimeter wave (mmWave) MIMO systems when the direct channel between the transceivers is blocked.