Reference : Differential Phase Compensation in Over-the-air Precoding Test-bed for a Multi-beam S...

	Document type :	Scientific congresses, symposiums and conference proceedings : Unpublished conference
	Discipline(s) :	Engineering, computing & technology : Aerospace & aeronautics engineering Engineering, computing & technology : Electrical & electronics engineering
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/53080

Title :	Differential Phase Compensation in Over-the-air Precoding Test-bed for a Multi-beam Satellite
Language :	English
Author, co-author :	Martinez Marrero, Liz [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 >]
	Querol, Jorge [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Maturo, Nicola [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Krivochiza, Jevgenij [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 :	10-Apr-2022
Reviewed work :	This article presents a closed-loop differential phase compensation system for a precoding-enabled multibeam satellite forward link and its validation by live experiments on a GEO satellite scenario. The precoding operation avoids inter-beam interference and maximizes the spectrum efficiency by full frequency reuse as an alternative to the traditional two-color or four-color reuse methods proposed in the DVB-S2 standard. However, the satellite payload introduces differential phase and frequency impairments, which can degrade the precoding performance. This work describes the implementation of the differential phase and frequency tracking and compensation loop in an end-to-end testbed over a multibeam satellite system with independent local oscillators. The developed system performs end-to-end real-time communication over the satellite link, including channel measurements and precompensation. Results are validated by an over-the-air demonstration using two beams of the SES-14 multibeam satellite. Each beam is transmitted by independent transponders, which results in differential frequency and phase offsets due to the transponder undisciplined local oscillators. This phase offset makes it impossible to use precoding without the phase compensation loop. We prove that the implemented system can successfully track and compensate the differential phase and frequency to improve precoding performance.
Peer reviewed :	Yes
On invitation :	No
Audience :	International
Event name :	IEEE Wireless Communications and Networking Conference (WCNC)
Event date :	from 10-04-2022 to 13-04-2022
Event place (city) :	Austin, TX
Event country :	USA
Keywords :	[en] synchronization ; differential phase compensation ; precoding ; satellite communication ; over-the-air demonstration
Abstract :	[en] This article presents a closed-loop differential phase compensation system for a precoding-enabled multibeam satellite forward link and its validation by live experiments on a GEO satellite scenario. The precoding operation avoids inter-beam interference and maximizes the spectrum efficiency by full frequency reuse as an alternative to the traditional two-color or four-color reuse methods proposed in the DVB-S2 standard. However, the satellite payload introduces differential phase and frequency impairments, which can degrade the precoding performance. This work describes the implementation of the differential phase and frequency tracking and compensation loop in an end-to-end testbed over a multibeam satellite system with independent local oscillators. The developed system performs end-to-end real-time communication over the satellite link, including channel measurements and precompensation. Results are validated by an over-the-air demonstration using two beams of the SES-14 multibeam satellite. Each beam is transmitted by independent transponders, which results in differential frequency and phase offsets due to the transponder undisciplined local oscillators. This phase offset makes it impossible to use precoding without the phase compensation loop. We prove that the implemented system can successfully track and compensate the differential phase and frequency to improve precoding performance.
Research centres :	Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM - Signal Processing & Communications
Funders :	European Space Agency - ESA ; SES S.A. ; Fonds National de la Recherche - FnR
Name of the research project :	LiveSatPreDem and COHESAT
Target :	Researchers
Permalink :	http://hdl.handle.net/10993/53080
DOI :	10.1109/WCNC51071.2022.9771918
Other URL :	https://ieeexplore.ieee.org/document/9771918
FnR project :	FnR ; FNR11689919 > Juan Merlano Duncan > COHESAT > Cognitive Cohesive Networks Of Distributed Units For Active And Passive Space Applications > 01/03/2018 > 31/08/2021 > 2017

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