Channel Reciprocity Calibration in TDD Hybrid Beamforming Massive MIMO Systems
- 23 March 2018
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Selected Topics in Signal Processing
- Vol. 12 (3), 422-431
- https://doi.org/10.1109/jstsp.2018.2819118
Abstract
Hybrid analog-digital (AD) beamforming structure is a very attractive solution to build low cost massive multiple-input multiple-output (MIMO) systems. Typically these systems use a set of fixed beams for transmission and reception to avoid the need to obtain channel state information at transmitter (CSIT) for each antenna element individually. However, such a method can not fully exploit the potential of hybrid AD beamforming systems. Alternatively, CSIT can be estimated by assuming a model for the propagation channel, whereas this model is only validated in millimeter-wave (mmWave) band thanks to its poor scattering nature. In this paper, we focus on time division duplex (TDD) systems with hybrid beamforming structure and propose a reciprocity calibration scheme that allows to acquire full CSIT. Different to existing CSIT acquisition methods, our approach does not require any assumption on the channel model and can estimate full CSIT.Keywords
Funding Information
- Huawei Mathematical and Algorithmic Sciences Lab
- Modeling, Calibrating and Exploiting Channel Reciprocity for Massive MIMO
- French Government (National Research Agency, ANR)
- Investments for the Future (#ANR-11-LABX-0031-01)
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