We propose a decentralized receiver for extra-large multiple-input multiple-output (XL-MIMO) arrays. Our method operates with no central processing unit (CPU) and all the signal detection tasks are done in distributed nodes. We exploit a combined message-passing framework to design an uncoordinated detection scheme that overcomes three major challenges in the XL-MIMO systems: computational complexity, scalability and non-stationarities in user energy distribution. Our numerical evaluations show a significant performance improvement compared to benchmark distributed methods while operating very close to the centralized receivers.
@article{arxiv.2103.06592,
title = {Uncoordinated and Decentralized Processing in Extra-Large MIMO Arrays},
author = {Abolfazl Amiri and Carles Navarro Manch'on and Elisabeth de Carvalho},
journal= {arXiv preprint arXiv:2103.06592},
year = {2021}
}