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Non-Orthogonal Multicast and Unicast Robust Beamforming in Integrated Terrestrial-Satellite Networks
Peng, Deyi; Domouchtsidis, Stavros; Chatzinotas, Symeon et al.
2022In IEEE Global Communications Conference
Peer reviewed
 

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Abstract :
[en] This paper studies the non-orthogonal multicast and unicast coordinated beamforming design for integrated terrestrial and satellite networks (ITSN), when the channel state information at the transmitter (CSIT) is imperfect. In order to mitigate the interference induced by simultaneous multicast and unicast links along with the spectrum coexisting mechanism for integrated terrestrial and satellite transmissions, we consider a two-layer layered division multiplexing (LDM) structure where the mul ticast and unicast services are provided in different layers. We formulate a coordinated beamforming problem with the objective to minimize the transmit power under individual quality of service (QoS) constraints. With regard to the unknown convexity of the transmit power minimization problem, we transform the original infeasible optimization into a deterministic optimization form with linear matrix inequality (LMI) by utilizing S-procedure and semi-definite relaxation (SDR) methods. Then, we introduce a penalty function and propose an iterative algorithm with guaranteed convergence to obtain optimal solutions. Simulation results demonstrate the superiority of the proposed coordinated beamforming scheme, especially for the case of imperfect CSIT, while our LDM based coordinated beamforming scheme signifi cantly outperforms the conventional ones in terms of sum rate. Index Terms—Integrated terrestrial and satellite networks (IT SN), beamforming, robust, layered division multiplexing (LDM)
Disciplines :
Computer science
Author, co-author :
Peng, Deyi
Domouchtsidis, Stavros ;  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
Li, Yu
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
yes
Language :
English
Title :
Non-Orthogonal Multicast and Unicast Robust Beamforming in Integrated Terrestrial-Satellite Networks
Publication date :
2022
Event name :
IEEE Global Communications Conference
Event place :
Rio de Janeiro, Brazil
Event date :
04-12-2022 to 08-12-2022
Audience :
International
Main work title :
IEEE Global Communications Conference
Publisher :
IEEE, United States
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust
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