Antenna spacings; Beam squints; Codebooks; Frequency-dependent; High frequency HF; Hybrid beamforming; Satellite communications system; THz frequencies; Wide-band; Wideband satellites; Artificial Intelligence; Computer Networks and Communications; Computer Science Applications; Signal Processing; Information Systems and Management; Renewable Energy, Sustainability and the Environment
Abstract :
[en] Wideband (WB) satellite communication (SatCom) systems, which utilize millimeter-wave (mmWave), sub-THz, and THz frequencies, are expected to be key enablers for 6G technology. However, employing beamforming transmission with an antenna array over these high-frequency WB is facing a significant challenge relating to the beam squint (BSq) effect. This phenomenon causes frequency-dependent variations in antenna radiation patterns, leading to misalignment of beam steering and degraded signal strength at off-center frequencies. This paper provides an in-depth analysis of the BSq effect and its impact on antenna gain across frequency and spatial domains in WB SatCom systems. Various compensation techniques are studied to mitigate BSq, including delay-based methods, hybrid beamforming (BF), and codebook-based BF, and antenna spacing-based design. Our findings demonstrate that the delay-based methods and hybrid BF are the most effective solutions for mitigating BSq when sufficient hardware resources are available. Additionally, the proposed low-complexity codebook-based BF and antenna spacing-based design demonstrate their effectiveness in enhancing BF gain and reducing the BSq effect, which are critical for the future of WB communication systems.
Disciplines :
Electrical & electronics engineering
Author, co-author :
NGUYEN, Ti Ti ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
MERLANO DUNCAN, Juan Carlos ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
HA, Vu Nguyen ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
GARCES SOCARRAS, Luis Manuel ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
VASQUEZ-PERALVO, Juan Andres ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
EAPPEN, Geoffrey
Gonzalez-Rios, Jorge L.; University of Luxembourg, Interdisciplinary Centre for Security, Reliability and Trust (SnT), Luxembourg
CUIMAN MARQUEZ, Raudel ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
LE, Thanh-Dung ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Tran, Duc Dung; University of Luxembourg, Interdisciplinary Centre for Security, Reliability and Trust (SnT), Luxembourg
CHATZINOTAS, Symeon ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
External co-authors :
yes
Language :
English
Title :
Wideband Beam Squint Analysis for Antenna Array-Equipped Satellite Communication Systems
Publication date :
2025
Event name :
2025 IEEE International Conference on Communications Workshops (ICC Workshops)
Event place :
Montreal, Can
Event date :
08-06-2025 => 12-06-2025
Main work title :
2025 IEEE International Conference on Communications Workshops, ICC Workshops 2025
Editor :
Valenti, Matthew
Publisher :
Institute of Electrical and Electronics Engineers Inc.
This work was supported in part by European Space Agency (ESA) under EGERTON project (4000134678/21/UK/AL). The opinions, interpretations, recommendations, and conclusions presented in this paper are those of the authors and are not necessarily endorsed by ESA. This work was also funded in part by the Luxembourg National Research Fund (FNR), with two granted projects corresponding to two grant references C23/IS/18073708/SENTRY (SENTRY project) and C21/IS/16352790/ARMMONY (ARMMONY project).
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