Distributed Spatially Non-Stationary Channel Estimation for Extremely-Large Antenna Systems

Yanqing Xu; Shuai Wang; Ruihong Jiang; Zhou Wang

Research Article

Distributed Spatially Non-Stationary Channel Estimation for Extremely-Large Antenna Systems

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@ARTICLE{10.4108/eetinis.v11i3.5992,
    author={Yanqing Xu and Shuai Wang and Ruihong Jiang and Zhou Wang},
    title={Distributed Spatially Non-Stationary Channel Estimation for Extremely-Large Antenna Systems},
    journal={EAI Endorsed Transactions on Industrial Networks and Intelligent Systems},
    volume={11},
    number={3},
    publisher={EAI},
    journal_a={INIS},
    year={2024},
    month={5},
    keywords={Channel estimation, spatially non-stationary channel, extremely large aperture array},
    doi={10.4108/eetinis.v11i3.5992}
}

Yanqing Xu
Shuai Wang
Ruihong Jiang
Zhou Wang
Year: 2024
Distributed Spatially Non-Stationary Channel Estimation for Extremely-Large Antenna Systems
INIS
EAI
DOI: 10.4108/eetinis.v11i3.5992

Yanqing Xu¹^,*, Shuai Wang²^,*, Ruihong Jiang³^,*, Zhou Wang⁴^,*

1: Chinese University of Hong Kong
2: Singapore University of Technology and Design
3: Beijing University of Posts and Telecommunications
4: Tsinghua University

*Contact email: shuai_wang@sutd.edu.sg, shuai_wang@sutd.edu.sg, shuai_wang@sutd.edu.sg, huai_wang@sutd.edu.sg

Abstract

This paper aims to develop a distributed channel estimation (CE) algorithm for spatially non-stationary (SNS) channels in extremely large aperture array systems, addressing the issues of high communication cost and computational complexity associated with traditional centralized algorithms. However, SNS channels differ from conventional spatially stationary channels, presenting new challenges such as varying sparsity patterns for different antennas. To overcome these challenges, we propose a novel distributed CE algorithm accompanied by a simple yet effective hard thresholding scheme. The proposed algorithm is not only suitable for uniform antenna arrays but also for irregularly deployed antennas. Simulation results demonstrate the advantages of the proposed algorithm in terms of estimation accuracy, communication cost, and computational complexity.

Keywords: Channel estimation, spatially non-stationary channel, extremely large aperture array

Received: 2024-05-07
Accepted: 2024-05-07
Published: 2024-05-07
Publisher: EAI

: http://dx.doi.org/10.4108/eetinis.v11i3.5992

Copyright © 2024 Xu et al., licensed to EAI. This is an open access article distributed under the terms of the CC BY-NCSA 4.0, which permits copying, redistributing, remixing, transformation, and building upon the material in any medium so long as the original work is properly cited.