In this paper, the zero-forcing and regularized zero-forcing schemes operating in crowded extra-large MIMO (XL-MIMO) scenarios with a fixed number of subarrays have been emulated using the randomized Kaczmarz algorithm (rKA). For that, non-stationary properties have been deployed through the concept of visibility regions when considering two different power normalization methods of non-stationary channels. We address the randomness design of rKA based on the exploitation of spatial non-stationary properties. Numerical results show that, in general, the proposed rKA-based combiner applicable to XL-MIMO systems can considerably decrease computational complexity of the signal detector by paying with small performance losses.
Cite
@article{arxiv.2001.11879,
title = {Low-Complexity Distributed XL-MIMO for Multiuser Detection},
author = {Victor Croisfelt Rodrigues and Abolfazl Amiri and Taufik Abrão and Elisabeth de Carvalho and Petar Popovski},
journal= {arXiv preprint arXiv:2001.11879},
year = {2020}
}