Future wireless multiple-input multiple-output (MIMO) communication systems will employ sub-6 GHz and millimeter wave (mmWave) frequency bands working cooperatively. Establishing a MIMO communication link usually relies on estimating channel state information (CSI) which is difficult to acquire at mmWave frequencies due to a low signal-to-noise ratio (SNR). In this paper, we propose three novel methods to estimate mmWave MIMO channels using out-of-band information obtained from the sub-6GHz band. We compare the proposed channel estimation methods with a conventional one utilizing only in-band information. Simulation results show that the proposed methods outperform the conventional mmWave channel estimation method in terms of achievable spectral efficiency, especially at low SNR and high K-factor.
@article{arxiv.2311.08996,
title = {Channel Estimation for mmWave MIMO using sub-6 GHz Out-of-Band Information},
author = {Faruk Pasic and Markus Hofer and Mariam Mussbah and Sebastian Caban and Stefan Schwarz and Thomas Zemen and Christoph F. Mecklenbräuker},
journal= {arXiv preprint arXiv:2311.08996},
year = {2024}
}
Comments
Published at the International Conference on Smart Applications, Communications and Networking (SmartNets), 2024