Efficient Deep Unfolding for SISO-OFDM Channel Estimation - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Efficient Deep Unfolding for SISO-OFDM Channel Estimation

Résumé

In modern communication systems, channel state information is of paramount importance to achieve capacity. It is then crucial to accurately estimate the channel. It is possible to perform SISO-OFDM channel estimation using sparse recovery techniques. However, this approach relies on the use of a physical wave propagation model to build a dictionary, which requires perfect knowledge of the system's parameters. In this paper, an unfolded neural network is used to lighten this constraint. Its architecture, based on a sparse recovery algorithm, allows SISO-OFDM channel estimation even if the system's parameters are not perfectly known. Indeed, its unsupervised online learning allows to learn the system's imperfections in order to enhance the estimation performance. The practicality of the proposed method is improved with respect to the state of the art in two aspects: constrained dictionaries are introduced in order to reduce sample complexity and hierarchical search within dictionaries is proposed in order to reduce time complexity. Finally, the performance of the proposed unfolded network is evaluated and compared to several baselines using realistic channel data, showing the great potential of the approach.
Fichier principal
Vignette du fichier
main_hal.pdf (742.53 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03810183 , version 1 (11-10-2022)

Identifiants

Citer

Baptiste Chatelier, Luc Le Magoarou, Getachew Redieteab. Efficient Deep Unfolding for SISO-OFDM Channel Estimation. IEEE international conference on communications (ICC), May 2023, Roma, Italy. ⟨hal-03810183⟩
50 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More