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.
no code implementations • 23 Oct 2023 • Hamza Djelouat, Mikko J. Sillanpää, Markku Juntti
This paper provides a solution for the activity detection and channel estimation problem in grant-free access with correlated device activity patterns.
no code implementations • 16 Oct 2023 • Hamza Djelouat, Mikko J. Sillanpää, Markus Leinonen, Markku Juntti
To solve the JUICE problem, we first leverage the concept of strong priors and propose a hierarchical-sparsity-inducing spike-and-slab prior to model the structured sparse activity pattern.
no code implementations • 4 May 2023 • Leatile Marata, Onel Luis Alcaraz López, Andreas Hauptmann, Hamza Djelouat, Hirley Alves
Compressed sensing multi-user detection (CS-MUD) algorithms play a key role in optimizing grant-free (GF) non-orthogonal multiple access (NOMA) for massive machine-type communications (mMTC).
no code implementations • 30 Nov 2022 • Hamza Djelouat, Markus Leinonen, Markku Juntti
This paper considers joint user identification and channel estimation (JUICE) in grant-free access with a \emph{clustered} user activity pattern.
no code implementations • 27 Sep 2022 • Leatile Marata, Onel Luis Alcaraz López, Hamza Djelouat, Markus Leinonen, Hirley Alves, Markku Juntti
Cellular networks that are traditionally designed for human-type communication (HTC) have the potential to provide cost effective connectivity to machine-type communication (MTC).
no code implementations • 8 Dec 2021 • Hamza Djelouat, Leatile Marata, Markus Leinonen, Hirley Alves, Markku Juntti
This paper addresses the problem of joint user identification and channel estimation (JUICE) for grant-free access in massive machine-type communications (mMTC).
no code implementations • 17 Apr 2021 • Hamza Djelouat, Markus Leinonen, Markku Juntti
First, for the case without prior information, we formulate the JUICE as an iterative reweighted $\ell_{2, 1}$-norm minimization problem.
no code implementations • 15 Mar 2021 • Hamza Djelouat, Markus Leinonen, Markku Juntti
Joint user identification and channel estimation (JUICE) is a main challenge in grant-free massive machine-type communications (mMTC).
no code implementations • 10 Mar 2021 • Ayman Al-Kababji, Abbes Amira, Faycal Bensaali, Abdulah Jarouf, Lisan Shidqi, Hamza Djelouat
Fall detection is a serious healthcare issue that needs to be solved.