Browsing by Author "Chatzinotas, Symeon"

Now showing items 1-17 of 17

    • A Cubesat-ready phase synchronization digital payload for coherent distributed remote sensing missions 

      Querol Borràs, Jorge; Merlano-Duncan, Juan Carlos; Martínez Marrero, Liz; Krivochiza, Jevgenij; Kumar, Sumit; Maturo, Nicola; Camps Carmona, Adriano José; Chatzinotas, Symeon; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      Distributed antenna arrays, fractionated payloads and cooperative platforms can provide unprecedented performance in the next generation of spaceborne communications and remote sensing systems. Remote phase synchronization ...

    • A remote carrier synchronization technique for coherent distributed remote sensing systems 

      Merlano-Duncan, Juan Carlos; Martínez Marrero, Liz; Querol Borràs, Jorge; Kumar, Sumit; Camps Carmona, Adriano José; Chatzinotas, Symeon; Ottersten, Bjorn (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
      Open Access
      Phase, frequency, and time synchronization are crucial requirements for many applications, such as multistatic remote sensing and communication systems. Moreover, the synchronization solution becomes even more challenging ...

    • Adaptive beam pattern selection and resource allocation for NOMA-based LEO satellite systems 

      Wang, Anyue; Lei, Lei; Hu, Xin; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Open Access
      The low earth orbit (LEO) satellite system is one of the promising solutions to provide broadband services to a wide-coverage area for future integrated LEO-6G networks, where users' demands vary with time and geographical ...

    • Architectures and synchronization techniques for distributed satellite systems: a survey 

      Martínez Marrero, Liz; Merlano-Duncan, Juan Carlos; Querol Borràs, Jorge; Kumar, Sumit; Krivochiza, Jevgenij; Krishna Sharma, Shree; Chatzinotas, Symeon; Camps Carmona, Adriano José; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2022-04-22)
      Article
      Open Access
      Cohesive Distributed Satellite Systems (CDSSs) is a key enabling technology for the future of remote sensing and communication missions. However, they have to meet strict synchronization requirements before their use is ...

    • Autonomous reconfigurable intelligent surfaces through wireless energy harvesting 

      Ntontin, Konstantinos; Boulogeorgos, Alexandros Apostolos A.; Björnson, Emil; Selimis, Dimitrios; Martins, Wallace Alves; Abadal Cavallé, Sergi; Alexiou, Angeliki; Lazarakis, Fotis; Kisseleff, Steven; Chatzinotas, Symeon (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Open Access
      In this paper, we examine the potential for a reconfigurable intelligent surface (RIS) to be powered by energy harvested from information signals. This feature might be key to reap the benefits of RIS technology's lower ...

    • Effects of differential oscillator phase noise in precoding performance 

      Martínez Marrero, Liz; Merlano-Duncan, Juan Carlos; Querol, Jorge; Chatzinotas, Symeon; Camps Carmona, Adriano José; Ottersten, Björn (2019)
      Conference report
      Restricted access - publisher's policy
      Satellite Precoding is a promising technique to meet the target data rates of the future high throughput satellite systems and the costs per bit as required by 5G applications and networks, but it requires strict synchronization ...

    • Integrated terrestrial-satellite wireless backhauling: resource management and benefits for 5G 

      Shaat, Musbah; Lagunas, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon (2018-07-13)
      Article
      Open Access

    • Joint optimization of beam-hopping design and NOMA-assisted transmission for flexible satellite systems 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2022-10)
      Article
      Open Access
      Next-generation satellite systems require more flexibility in resource management such that available radio resources can be dynamically allocated to meet time-varying and non-uniform traffic demands. Considering potential ...

    • Multibeam joint precoding: frame-based design 

      Christopoulos, Dimitrios; Chatzinotas, Symeon; Taricco, Giorgio; Vazquez, Miguel Angel; Pérez Neira, Ana Isabel; Arapoglou, Pantelis-Daniel; Ginesi, Alberto (Academic Press, 2015-05-11)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Cooperative and Cognitive Satellite Systems provides a solid overview of the current research in the field of cooperative and cognitive satellite systems, helping users understand how to incorporate state-of-the-art ...

    • NOMA-enabled multi-beam satellite systems: Joint optimization to overcome offered-requested data mismatches 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2021-01)
      Article
      Open Access
      Non-Orthogonal Multiple Access (NOMA) has the potentials to improve the performance of multi-beam satellite systems. The performance optimization in satellite-NOMA systems can be different from that in terrestrial-NOMA ...

    • Precoding in multibeam satellite communications: present and future challenges 

      Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Christopoulos, Dimitrios; Chatzinotas, Symeon; Ottersten, Bjorn; Arapoglou, Pantelis-Daniel; Ginesi, Alberto; Tarocco, Giorgio (2016-12-01)
      Article
      Open Access
      Whenever multibeam satellite systems target very aggressive frequency reuse in their coverage area, inter-beam interference becomes the major obstacle for increasing the overall system throughput. As a matter of fact, users ...

    • Precoding in multibeam satellite communications: present and future challenges 

      Vazquez, Miguel Angel; Pérez Neira, Ana Isabel; Christopoulos, Dimitrios; Chatzinotas, Symeon; Ottersten, Björn; Arapoglou, Pantelis-Daniel; Ginesi, Alberto; Tarocco, Giorgio (2016-12-01)
      Article
      Open Access
      Whenever multibeam satellite systems target very aggressive frequency reuse in their coverage area, inter-beam interference becomes the major obstacle for increasing the overall system throughput. As a matter of fact, users ...

    • Precoding, scheduling and link adaptation in mobile interactive multibeam satellite systems 

      Vázquez Oliver, Miguel Ángel; Bhavani Shankar, M. R.; Kourogiorgas, Charilaos; Arapoglou, Pantelis-Daniel; Icolari, Vicenzo; Chatzinotas, Symeon; Panagopoulos, Athanasios D.; Pérez Neira, Ana Isabel (2018-05-03)
      Article
      Open Access
      This paper deals with the problem of precoding, scheduling and link adaptation in next generation mobile interactive multibeam satellite systems. In contrast to the fixed satellite services, when the user terminals move ...

    • Shared access satellite-terrestrial reconfigurable backhaul network enabled by smart antennas at mm-wave band 

      Artiga Campos, Xavier; Pérez Neira, Ana Isabel; Baranda Hortigüela, Jorge; Lagunas Targarona, Eva; Chatzinotas, Symeon; Ziaragkas, Georgios (2018-09-01)
      Article
      Open Access
      5G traffic expectations require not only the appropriate access infrastructure, but also the corresponding backhaul infrastructure to ensure a well-balanced network scaling. Optical fibre and terrestrial wireless backhaul ...

    • Signal processing for high-throughput satellites challenges in new interference-limited scenarios 

      Pérez Neira, Ana Isabel; Vázquez Oliver, Miguel Ángel; Bhavani Shankar, M. R.; Maleki, Sina; Chatzinotas, Symeon (2019-07-01)
      Article
      Open Access
      The field of satellite communications (SatCom) is enjoying renewed attention in the global telecommunications market, and high-throughput satellites, with their multiple spot beams, are critical components for delivering ...

    • Time-and unit-cell splitting comparison for the autonomous operation of reconfigurable intelligent surfaces 

      Ntontin, Konstantinos; Björnson, Emil; Boulogeorgos, Alexandros Apostolos A.; Abdullah, Zaid; Mesodiakaki, Agapi; Abadal Cavallé, Sergi; Chatzinotas, Symeon (Institute of Electrical and Electronics Engineers (IEEE), 2023-09)
      Article
      Open Access
      In this work, we analytically compare the performance of the time-and unit cell-splitting protocols for satisfying the energy needs of reconfigurable intelligent surfaces (RISs) through wireless energy harvesting from ...

    • Wireless energy harvesting for autonomous reconfigurable intelligent surfaces 

      Ntontin, Konstantinos; Boulogeorgos, Alexandros Apostolos A.; Björnson, Emil; Martins, Wallace Alves; Kisseleff, Steven; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; Papazafeiropoulos, Anastasios; Lazarakis, Fotis; Chatzinotas, Symeon (Institute of Electrical and Electronics Engineers (IEEE), 2023-03)
      Article
      Open Access
      In the current contribution, we examine the feasibility of fully-energy-autonomous operation of reconfigurable intelligent surfaces (RIS) through wireless energy harvesting (EH) from incident information signals. Towards ...