Affiliation(s):
Beijing University of Posts and Telecommunications, Beijing 100876, China;
moreAffiliation(s): Beijing University of Posts and Telecommunications, Beijing 100876, China; China Mobile Research Institute, Beijing 100053, China;
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Abstract: Extremely large-scale multiple-input-multiple-output(XL-MIMO), offering vast spatial degrees of freedom by deploying a huge number of antennas, is a promising enabling technology to empower sixth generation mobile networks (6G). XL-MIMO channel model is a prerequisite of XL-MIMO technology optimization, system design, and performance evaluation. In this paper, we provide an overview of challenges and ongoing research in XL-MIMO channel measurement, characterization, and modeling. In particular, characterizing and modeling near-field effects and spatial non-stationarity (SnS) are discussed. Also, the channel modeling methods that can describe these new channel characteristics are surveyed. Furthermore, open issues in XL-MIMO channel measurement, characterization, and modeling are presented to give insights into future XL-MIMO channel research.
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Reference
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