[en] Low-Earth Orbit (LEO) satellite mega-constellations
have attracted significant interest for their global network coverage
and reduced latency with respect to their geostationary
counterparts. LEO satellites are typically equipped with advanced
antenna architectures, which allow spot-beam steering to specific
areas within the field of view. With the aim to minimize onboard
complexity, this paper studies the beam synthesis and
steering using Time Modulated Arrays (TMA). By analyzing
the properties of the on-off switching and their impact on the
resulting beam footprint, this paper establishes the relationship
between the pulse activation characteristics and the steering
angle of the corresponding users in a downlink satellite-to-
Earth transmission. The corresponding Signal-to-Noise Plus Interference
Ratio (SINR) is derived and analyzed for multi-beam
patterns with different inter-beam separations. We compare the
performance of TMA-based LEO downlink transmission with
conventional beamforming techniques, confirming the promising
performance of TMA with reduced complexity. Finally, the
TMA response is evaluated for practical channel estimation
imperfections, demonstrating the degree of tolerance depending
on the beam shape.
Précision sur le type de document :
Compte rendu
Disciplines :
Sciences informatiques
Auteur, co-auteur :
LEMA, Gebrehiwet Gebrekrstos ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
BANDI, Ashok ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
LAGUNAS, Eva ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
MYSORE RAMA RAO, Bhavani Shankar ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SPARC
Joel Grotz; SES S.A. Luxembourg
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
TMA-Based Beamforming For Next Generation Satellite Communication Applications
Date de publication/diffusion :
12 juin 2024
Titre du périodique :
IEEE International Conference on Communications
ISSN :
1550-3607
Maison d'édition :
Institute of Electrical and Electronics Engineers (IEEE), Denver, USA, Etats-Unis - New Jersey
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