This paper considers the downlink of a single-cell massive MIMO (multiple-input multiple-output) system with dual-polarized antennas at both the base station and users. We consider a channel model that takes into account several practical aspects that arise when utilizing dual polarization, such as channel cross-polar discrimination (XPD) and cross-polar receive and transmit correlations (XPC). We derive the statistical properties of the minimum mean squared error (MMSE) channel estimator for this model. Using these estimates for maximum ratio precoding, a rigorous closed-form downlink spectral efficiency (SE) expression is derived. We compare the SEs achieved in dual-polarized and uni-polarized setups numerically and evaluate the impact of XPD on the downlink SE.
@article{arxiv.2206.08223,
title = {Downlink Spectral Efficiency of Massive MIMO with Dual-Polarized Antennas},
author = {Özgecan Özdogan and Emil Björnson},
journal= {arXiv preprint arXiv:2206.08223},
year = {2022}
}
Comments
Published at the 25th International ITG Workshop on Smart Antennas (WSA) 2021, 6 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:2202.10084