Near-field communications for extremely large-scale array

doi:10.12267/j.issn.2096-5931.2023.09.008

Abstract

Abstract:

Extremely large-scale array has brought new opportunities for communication by effectively increasing the transmission distance and overcoming the path loss. In the extremely large-scale array system, the user and the scatterer are likely to be located in the near-field radiation region. Therefore, the communication system should adopt an accurate spherical wave model. However, research on near-field communication for extremely large-scale array is still in its initial stage and faces some challenges such as the high cost of codebook search and high complexity of beam tracking. This paper analyzes the key problems in near-field communication for extremely large-scale array, including beam training, beam tracking and visibility regions of antenna based on existing research. Then, it presents the challenges and proposes the future vision.

Key words: extremely large-scale array, near-field communication, beam training, visibility regions of antenna

CLC Number:

TN929.5

CONG Jiayi, LI Guoyu, YOU Changsheng. Near-field communications for extremely large-scale array[J]. Information and Communications Technology and Policy, 2023, 49(9): 52-57.

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URL:

http://ictp.caict.ac.cn/EN/10.12267/j.issn.2096-5931.2023.09.008

http://ictp.caict.ac.cn/EN/Y2023/V49/I9/52

Figures/Tables 3

References 18

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