1. Channel Estimation for mmWave MIMO using sub-6 GHz Out-of-Band Information
- Author
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Pasic, Faruk, Hofer, Markus, Mussbah, Mariam, Caban, Sebastian, Schwarz, Stefan, Zemen, Thomas, and Mecklenbräuker, Christoph F.
- Subjects
Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
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., Comment: Published at the International Conference on Smart Applications, Communications and Networking (SmartNets), 2024
- Published
- 2023
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