Inband and out-of-band performance evaluation of downlink CF-mMIMO-OFDM under low-resolution DACs - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Inband and out-of-band performance evaluation of downlink CF-mMIMO-OFDM under low-resolution DACs

Résumé

Cell-free massive MIMO (CF-mMIMO) technology has proved to offer significant gains in terms of spectral efficiency (SE). However, it can be economically attractive only when adopting low cost and energy-efficient hardware. This hardware includes components such as low-resolution digitalto-analog converters (DACs), and causes signal distortions called hardware impairments (HWI). In this paper, first, we propose an analytical characterization for low-resolution DAC where the exact behavior can be described, allowing to shine a new light on DAC-induced distortions. Based on the well-known Bussgang decomposition, we derive for a known signal distribution through closed-form expressions based on the integer and fractional resolution separately for downlink SE performance of orthogonal frequency multiplexing (OFDM) based CF-mMIMO. Moreover, we propose a new CF-mMIMO-specific framework to observe the out-of-band (OOB) radiations on potential victim users. We point out that OOB radiations is less of a problem in multi-user CF-mMIMO, where the total OOB radiated power is sufficiently low to respect any standard mask. Meanwhile, inband distortions represent a serious problem that have to be tackled.
Fichier principal
Vignette du fichier
DAC_Impairment_WCNC_IEEE_version.pdf (1.32 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

cea-04662896 , version 1 (26-07-2024)

Identifiants

Citer

Antoine Durant, Rafik Zayani, David Demmer. Inband and out-of-band performance evaluation of downlink CF-mMIMO-OFDM under low-resolution DACs. IEEE Wireless Communications and Networking Conference 2024, Apr 2024, Dubaï, United Arab Emirates. ⟨10.1109/WCNC57260.2024.10570683⟩. ⟨cea-04662896⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More