Reference : When RIS Meets GEO Satellite Communications: A New Sustainable Optimization Framework...

	Document type :	Scientific congresses, symposiums and conference proceedings : Unpublished conference
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering
	Focus Areas :	Security, Reliability and Trust
	To cite this reference:	http://hdl.handle.net/10993/51359

Title :	When RIS Meets GEO Satellite Communications: A New Sustainable Optimization Framework in 6G
Language :	English
Author, co-author :	Khan, Wali Ullah [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 >]
	Mahmood, Asad [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Chatzinotas, Symeon [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Ottersten, Björn [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Publication date :	19-Jun-2022
Number of pages :	6
Reviewed work :	Khan, Wali Ullah, et al. "When RIS Meets GEO Satellite Communications: A New Sustainable Optimization Framework in 6G." IEEE Vehicular Technology Conference (VTC2022-Spring), Helsinki Finland, 2022.
Peer reviewed :	Yes
Audience :	International
Event name :	The 2022 IEEE 95th Vehicular Technology Conference: VTC2022-Spring
Event date :	19-06-2022 to 22-06-2022
Event organizer :	IEEE
Event place (city) :	Helsinki
Event country :	Finland
Keywords :	[en] GEO Satellite Communications ; Reflecting Intelligent Surfaces ; Channel Capacity Optimization
Abstract :	[en] Reflecting intelligent surfaces (RIS) is a low-cost and energy-efficient solution to achieve high spectral efficiency in sixth-generation (6G) networks. The basic idea of RIS is to smartly reconfigure the signal propagation by using passive reflecting elements. On the other side, the demand of high throughput geostationary (GEO) satellite communications (SatCom) is rapidly growing to deliver broadband services in inaccessible/insufficient covered areas of terrestrial networks. This paper proposes a GEO SatCom network, where a satellite transmits the signal to a ground mobile terminal using multicarrier communications. To enhance the effective gain, the signal delivery from satellite to the ground mobile terminal is also assisted by RIS which smartly shift the phase of the signal towards ground terminal. We consider that RIS is mounted on a high building and equipped with multiple re-configurable passive elements along with smart controller. We jointly optimize the power allocation and phase shift design to maximize the channel capacity of the system. The joint optimization problem is formulated as nonconvex due to coupled variables which is hard to solve through traditional convex optimization methods. Thus, we propose a new optimal algorithm which is based on Mesh Adaptive Direct Search to obtain an efficient solution. Simulation results unveil the benefits of RIS-assisted SatCom in terms of system channel capacity.
Research centres :	Interdisciplinary Centre for Security, Reliability and Trust (SnT), University of Luxembourg
Funders :	FNR – Luxembourg National Research Fund – CORE Program
Name of the research project :	RISOTTI - Reconfigurable Intelligent Surfaces for Smart Cities
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/10993/51359
DOI :	10.48550/arXiv.2202.00497
Other URL :	https://arxiv.org/abs/2202.00497
Commentary :	No comments available
FnR project :	FnR ; FNR14773976 > Bjorn Ottersten > RISOTTI > Reconfigurable Intelligent Surfaces For Smart Cities > 01/06/2021 > 31/05/2024 > 2020

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