278 citations · 930 across the 15 of their papers we have counts for
16 papers
Distributed Optimization for Coordinated Beamforming in Multi-Cell Multigroup Multicast Systems: Power Minimization and SINR Balancing
Oskari Tervo, Harri Pennanen, Dimitrios Christopoulos +2
This paper considers coordinated multicast beamforming in a multi-cell multigroup multiple-input single-output system. Each base station (BS) serves multiple groups of users by for…
Symbol-level and Multicast Precoding for Multiuser Multiantenna Downlink: A Survey, Classification and Challenges
Maha Alodeh, Danilo Spano, Ashkan Kalantari +4
Precoding has been conventionally considered as an effective means of mitigating the interference and efficiently exploiting the available in the multiantenna downlink channel, whe…
Distributed Coordinated Beamforming for Multi-cell Multigroup Multicast Systems
Harri Pennanen, Dimitrios Christopoulos, Symeon Chatzinotas +1
This paper considers coordinated multicast beamforming in a multi-cell wireless network. Each multiantenna base station (BS) serves multiple groups of single antenna users by gener…
Precoding in Multibeam Satellite Communications: Present and Future Challenges
Miguel Ángel Vázquez, Ana Pérez-Neira, Dimitrios Christopoulos +5
Whenever multibeam satellite systems target very aggressive frequency reuse in their coverage area, inter-beam interference becomes the major obstacle for increasing the overall sy…
Cellular-Broadcast Service Convergence through Caching for CoMP Cloud RANs
Symeon Chatzinotas, Dimitrios Christopoulos, Bjorn Ottersten
Cellular and Broadcast services have been traditionally treated independently due to the different market requirements, thus resulting in different business models and orthogonal f…
Coordinated Multibeam Satellite Co-location: The Dual Satellite Paradigm
Dimitrios Christopoulos, Shree Krishna Sharma, Symeon Chatzinotas +1
In the present article, a new system architecture for the next generation of satellite communication (SatComs) is presented. The key concept lies in the collaboration between multi…
Multicast Multigroup Beamforming for Per-antenna Power Constrained Large-scale Arrays
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
Large in the number of transmit elements, multi-antenna arrays with per-element limitations are in the focus of the present work. In this context, physical layer multigroup multica…
Sum Rate Maximizing Multigroup Multicast Beamforming under Per-antenna Power Constraints
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
A multi-antenna transmitter that conveys independent sets of common data to distinct groups of users is herein considered, a model known as physical layer multicasting to multiple…
Multicast Multigroup Beamforming under Per-antenna Power Constraints
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
Linear precoding exploits the spatial degrees of freedom offered by multi-antenna transmitters to serve multiple users over the same frequency resources. The present work focuses o…
Weighted Fair Multicast Multigroup Beamforming under Per-antenna Power Constraints
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
A multi-antenna transmitter that conveys independent sets of common data to distinct groups of users is considered. This model is known as physical layer multicasting to multiple c…
Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
The present work focuses on the forward link of a broadband multibeam satellite system that aggressively reuses the user link frequency resources. Two fundamental practical challen…
Frame Based Precoding in Satellite Communications: A Multicast Approach
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
In the present work, a multibeam satellite that employs aggressive frequency reuse towards increasing the offered throughput is considered. Focusing on the forward link, the goal i…
Constructive Interference in Linear Precoding Systems: Power Allocation and User Selection
Dimitrios Christopoulos, Symeon Chatzinotas, Ioannis Krikidis +1
The exploitation of interference in a constructive manner has recently been proposed for the downlink of multiuser, multi-antenna transmitters. This novel linear precoding techniqu…
MMSE Performance Analysis of Generalized Multibeam Satellite Channels
Dimitrios Christopoulos, Jesus Arnau, Symeon Chatzinotas +2
Aggressive frequency reuse in the return link (RL) of multibeam satellite communications (SatComs) is crucial towards the implementation of next generation, interactive satellite s…
User Scheduling for Coordinated Dual Satellite Systems with Linear Precoding
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
The constantly increasing demand for interactive broadband satellite communications is driving current research to explore novel system architectures that reuse frequency in a more…
Multi-User Detection in Multibeam Mobile Satellite Systems: A Fair Performance Evaluation
Dimitrios Christopoulos, Symeon Chatzinotas, Jens Krause +1
Multi-User Detection (MUD) techniques are currently being examined as promising technologies for the next generation of broadband, interactive, multibeam, satellite communication (…