LSFD for Rician-Faded Cell-Free mMIMO Systems With Channel Aging and Hardware Impairments
Abstract
We study the impact of channel aging on the uplink of a cell-free massive multiple-input multiple-output system with hardware impairments. We consider a dynamic analog-to-digital converter architecture at the access points (APs), and low-resolution digital-to-analog converters at the user equipments (UEs). We derive a closed-form spectral efficiency expression by considering i) practical spatially-correlated Rician channels; ii) hardware impairments at the APs and the UEs; iii) channel aging; and iv) large-scale fading decoding (LSFD). We show that LSFD can effectively mitigate the detrimental effects of i) channel aging for both low and high UE velocities; and ii) inter-user interference for low-velocity UEs but not for high-velocity UEs.
Keywords
Cite
@article{arxiv.2302.10587,
title = {LSFD for Rician-Faded Cell-Free mMIMO Systems With Channel Aging and Hardware Impairments},
author = {Anish Chattopadhyay and Venkatesh Tentu and Dheeraj Naidu Amudala and Rohit Budhiraja},
journal= {arXiv preprint arXiv:2302.10587},
year = {2023}
}
Comments
This paper is accepted for presentation in 2023 IEEE International Conference on Communications (ICC): Wireless Communications Symposium (IEEE ICC'23 - WC Symposium), 6 pages and 4 figures