Automotive radar; beam-squint; DoA estimation; THz band; vehicular communications; Beam squints; Direction of arrival estimation; Field directions; Large arrays; Near fields; Spherical wavefronts; Tera Hertz; Terahertz band; Vehicular communications; Computer Networks and Communications; Modeling and Simulation; Instrumentation; Radiation
Résumé :
[en] Automotive radar at terahertz (THz) band has the potential to provide compact design. The availability of wide bandwidth at THz-band leads to high range resolution. Further, very narrow beamwidth arising from large arrays yields high angular resolution up to milli-degree level direction-of-arrival (DoA) estimation. At THz frequencies and extremely large arrays, the signal wavefront is spherical in the near-field that renders traditional far-field DoA estimation techniques unusable. In this work, we examine near-field DoA estimation for THz automotive radar. We propose an algorithm using multiple signal classification (MUSIC) to estimate target DoAs and ranges while also taking beam-squint in near-field into account. Using an array transformation approach, we compensate for near-field beam-squint in noise subspace computations to construct the beam-squint-free MUSIC spectra. Numerical experiments show the effectiveness of the proposed method to accurately estimate the target parameters.
Disciplines :
Sciences informatiques
Auteur, co-auteur :
Elbir, Ahmet M.; University of Luxembourg, Luxembourg
MISHRA, Kumar Vijay ; University of Luxembourg ; United States DEVCOM Army Research Laboratory, Adelphi, United States
CHATZINOTAS, Symeon ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Spherical Wavefront Near-Field DoA Estimation in THz Automotive Radar
Date de publication/diffusion :
17 mars 2024
Nom de la manifestation :
2024 18th European Conference on Antennas and Propagation (EuCAP)
Organisateur de la manifestation :
EuCAP
Lieu de la manifestation :
Glasgow, Gbr
Date de la manifestation :
17-03-2024 => 22-03-2024
Sur invitation :
Oui
Manifestation à portée :
International
Titre de l'ouvrage principal :
18th European Conference on Antennas and Propagation, EuCAP 2024
Maison d'édition :
Institute of Electrical and Electronics Engineers Inc.
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