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Hybrid CSI-based hierarchical beamforming for flexible duplex MIMO systems

Hybrid CSI-based hierarchical beamforming for flexible duplex MIMO systems
Hybrid CSI-based hierarchical beamforming for flexible duplex MIMO systems
Flexible duplex (FD) techniques, including dynamic time-division duplex and dynamic frequency division duplex, are widely recognized as pivotal solutions to meeting the asymmetric and dynamic traffic demands in cellular systems. However, the coexistence of opposite transmission directions at the same time between neighboring cells inevitably results in cross-link interference (CLI), leading to significant degradation in network throughput. To tackle this issue, we exploit the trade-off between interference cancellation and spatial multiplexing capabilities in FD systems, and develop a hybrid channel state information (CSI) based hierarchical beamforming algorithm to mitigate the CLI. Compared with the existing state-of-the-art schemes, the proposed algorithm can substantially suppress the CLI with a
much lower overhead of CSI acquisition between base stations. Simulation results demonstrate the superior performance of our proposed algorithm.
0018-9545
Zhai, Hou-Yu
582a4738-0cd5-4d5f-8103-f685d3460900
Yang, Shaoshi
23650ec4-bcc8-4a2c-b1e7-a30893f52e52
Yuan, Tian-Hao
284da064-8262-49d7-91e1-4555cb417b43
Wang, Xiao-Yang
6f6e5675-af49-4c06-8abf-2a45a9427fb8
Tan, Jing-Sheng
055b48bd-5b1c-498c-94b9-f5c5818459ea
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Zhai, Hou-Yu
582a4738-0cd5-4d5f-8103-f685d3460900
Yang, Shaoshi
23650ec4-bcc8-4a2c-b1e7-a30893f52e52
Yuan, Tian-Hao
284da064-8262-49d7-91e1-4555cb417b43
Wang, Xiao-Yang
6f6e5675-af49-4c06-8abf-2a45a9427fb8
Tan, Jing-Sheng
055b48bd-5b1c-498c-94b9-f5c5818459ea
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Zhai, Hou-Yu, Yang, Shaoshi, Yuan, Tian-Hao, Wang, Xiao-Yang, Tan, Jing-Sheng and Chen, Sheng (2025) Hybrid CSI-based hierarchical beamforming for flexible duplex MIMO systems. IEEE Transactions on Vehicular Technology. (doi:10.1109/TVT.2025.3587463).

Record type: Article

Abstract

Flexible duplex (FD) techniques, including dynamic time-division duplex and dynamic frequency division duplex, are widely recognized as pivotal solutions to meeting the asymmetric and dynamic traffic demands in cellular systems. However, the coexistence of opposite transmission directions at the same time between neighboring cells inevitably results in cross-link interference (CLI), leading to significant degradation in network throughput. To tackle this issue, we exploit the trade-off between interference cancellation and spatial multiplexing capabilities in FD systems, and develop a hybrid channel state information (CSI) based hierarchical beamforming algorithm to mitigate the CLI. Compared with the existing state-of-the-art schemes, the proposed algorithm can substantially suppress the CLI with a
much lower overhead of CSI acquisition between base stations. Simulation results demonstrate the superior performance of our proposed algorithm.

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beamforming - Accepted Manuscript
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Accepted/In Press date: 3 July 2025
e-pub ahead of print date: 10 July 2025

Identifiers

Local EPrints ID: 503918
URI: http://eprints.soton.ac.uk/id/eprint/503918
ISSN: 0018-9545
PURE UUID: d49e5d40-1ba7-4b0f-b5ee-355963e20bfa

Catalogue record

Date deposited: 18 Aug 2025 16:43
Last modified: 18 Aug 2025 16:43

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Contributors

Author: Hou-Yu Zhai
Author: Shaoshi Yang
Author: Tian-Hao Yuan
Author: Xiao-Yang Wang
Author: Jing-Sheng Tan
Author: Sheng Chen

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