Impact of Channel Aging on Zero-Forcing Precoding in Cell-Free Massive MIMO Systems
Information Theory
2021-07-06 v1 Signal Processing
math.IT
Abstract
In the context of cell-free massive multi-input multi-output (mMIMO), zero-forcing precoding (ZFP) requires the exchange of instantaneous channel state information and precoded data symbols via a fronthaul network. It causes considerable propagation and processing delays, which degrade performance. This letter analyzes the impact of channel aging on the performance of ZFP in cell-free mMIMO. The aging effects of not only user mobility but also phase noise are considered. Numerical results in terms of per-user spectral efficiency are illustrated.
Cite
@article{arxiv.2107.01404,
title = {Impact of Channel Aging on Zero-Forcing Precoding in Cell-Free Massive MIMO Systems},
author = {Wei Jiang and Hans Dieter Schotten},
journal= {arXiv preprint arXiv:2107.01404},
year = {2021}
}