D
Dimitrios Christopoulos
Researcher at University of Luxembourg
Publications - 48
Citations - 1666
Dimitrios Christopoulos is an academic researcher from University of Luxembourg. The author has contributed to research in topics: Precoding & Communications satellite. The author has an hindex of 21, co-authored 47 publications receiving 1413 citations. Previous affiliations of Dimitrios Christopoulos include European Space Agency.
Papers
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Journal ArticleDOI
Weighted Fair Multicast Multigroup Beamforming Under Per-antenna Power Constraints
TL;DR: A detailed solution to tackle the weighted max-min fair multigroup multicast problem under per-antenna power constraints is derived and robust per-Antenna constrained multigroup multipurpose beamforming solutions are proposed.
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Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications
TL;DR: In this article, a frame-based precoding problem is optimally solved using the principles of physical layer multicasting to multiple co-channel groups under per-antenna constraints, and a novel optimization problem that aims at maximizing the system sum rate under individual power constraints is proposed.
Journal ArticleDOI
Precoding in Multibeam Satellite Communications: Present and Future Challenges
Miguel Angel Vazquez,Ana I. Perez-Neira,Dimitrios Christopoulos,Symeon Chatzinotas,Bjorn Ottersten,Pantelis-Daniel Arapoglou,Alberto Ginesi,Giorgio Tarocco +7 more
TL;DR: The vision on advanced precoding techniques and user clustering methods for multibeam broadband fixed satellite communications and practical challenges to deploy precoding schemes and the support introduced in the recently published DVB-S2X standard are provided.
Journal ArticleDOI
Symbol-Level and Multicast Precoding for Multiuser Multiantenna Downlink: A State-of-the-Art, Classification, and Challenges
Maha Alodeh,Danilo Spano,Ashkan Kalantari,Christos G. Tsinos,Dimitrios Christopoulos,Symeon Chatzinotas,Bjorn Ottersten +6 more
TL;DR: A unified view and classification of precoding techniques with respect to two main axes is presented: 1) the switching rate of the precoding weights, leading to the classes of block-level and symbol-level precoding and 2) the number of users that each stream is addressed to, hence unicast, multicast, and broadcast precoding.
Journal Article
Precoding in Multibeam Satellite Communications: Present and Future Challenges
Miguel Angel Vazquez,Ana I. Perez-Neira,Dimitrios Christopoulos,Symeon Chatzinotas,Bjorn Ottersten,Pantelis-Daniel Arapoglou,Alberto Ginesi,Giorgio Taricco +7 more
TL;DR: In this paper, the authors provide a vision on advanced precoding techniques and user clustering methods for multibeam broadband fixed satellite communications and discuss practical challenges to deploy precoding schemes and the support introduced in DVB-S2X standard.