Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Christopoulos, Dimitrios"'
Publikováno v:
In Finance Research Letters June 2023 54
Autor:
Tervo, Oskari, Pennanen, Harri, Christopoulos, Dimitrios, Chatzinotas, Symeon, Ottersten, Björn
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 forming a single beam with common information per group. We propose centr
Externí odkaz:
http://arxiv.org/abs/1710.00543
Autor:
Alodeh, Maha, Spano, Danilo, Kalantari, Ashkan, Tsinos, Christos, Christopoulos, Dimitrios, Chatzinotas, Symeon, Ottersten, Björn
Precoding has been conventionally considered as an effective means of mitigating the interference and efficiently exploiting the available in the multiantenna downlink channel, where multiple users are simultaneously served with independent informati
Externí odkaz:
http://arxiv.org/abs/1703.03617
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 generating a single beam with common data per group. The aim is to minimize
Externí odkaz:
http://arxiv.org/abs/1511.03561
Autor:
Vázquez, Miguel Ángel, Pérez-Neira, Ana, Christopoulos, Dimitrios, Chatzinotas, Symeon, Ottersten, Björn, Arapoglou, Pantelis-Daniel, Ginesi, Alberto, Taricco, Giorgio
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 located at the beam edges
Externí odkaz:
http://arxiv.org/abs/1506.08018
Cellular and Broadcast services have been traditionally treated independently due to the different market requirements, thus resulting in different business models and orthogonal frequency allocations. However, with the advent of cheap memory and sma
Externí odkaz:
http://arxiv.org/abs/1504.08274
Autor:
Christopoulos, Dimitrios, Sharma, Shree Krishna, Chatzinotas, Symeon, Ottersten, Jens Krauseand Bjorn
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 multibeam satellites that share one orbital position. Multi-satellite const
Externí odkaz:
http://arxiv.org/abs/1503.06981
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 multicasting under per-antenna power constrains, is investigated herein. To a
Externí odkaz:
http://arxiv.org/abs/1503.06966
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 challenges, namely the need to frame multiple users per transmission and the
Externí odkaz:
http://arxiv.org/abs/1406.7699
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 co-channel groups. In the recently proposed context of per-antenna pow
Externí odkaz:
http://arxiv.org/abs/1407.0005