A New Hybrid Message Passing Algorithm for Joint User Activity Detection, Channel Estimation and Data Decoding in Grant-Free OFDM-IDMA - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Vehicular Technology Année : 2024

A New Hybrid Message Passing Algorithm for Joint User Activity Detection, Channel Estimation and Data Decoding in Grant-Free OFDM-IDMA

Résumé

Grant-free access has the potential to reduce considerably the latency with respect to conventional contention-based access. However, in highly dynamic wireless networks, this paradigm comes with a number of new challenges, such as performing user activity detection and channel estimation directly upon packet arrival on top of symbol detection and decoding, due to limited signal overhead. In this paper, we consider an efficient hybrid message-passing algorithm, combining belief propagation with expectation propagation, to jointly perform all aforementioned tasks. A new expectation propagation message approximation rule is introduced for the sake of low-complexity Gaussian message-passing, without compromising the performance. Motivated by the need for non-orthogonal multiple access over frequency-selective channels, we validate the proposed scheme over a multi-antenna OFDM-interleave-division multiple access scenario. Numerical performance evaluations demonstrate the efficiency of the proposed method compared to existing ones in the same context.
Fichier principal
Vignette du fichier
manuscript.pdf (907.6 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04632993 , version 1 (03-07-2024)

Identifiants

Citer

Fakher Sagheer, Frédéric Lehmann, Antoine Berthet. A New Hybrid Message Passing Algorithm for Joint User Activity Detection, Channel Estimation and Data Decoding in Grant-Free OFDM-IDMA. IEEE Transactions on Vehicular Technology, In press, ⟨10.1109/TVT.2024.3377889⟩. ⟨hal-04632993⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More