Nicolas Chuberre

Cognitive spectrum utilization in Ka band multibeam satellite communications

Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic demands expected in the future. However, these systems are spectrum limited due to the current spectrum allocation policies. This paper investigates the potential of applying cognitive radio techniques in satellite communications (SatCom) in order to increase the spectrum opportunities for future generations of satellite networks without interfering with the operation of incumbent services. These extra spectrum opportunities can potentially amount to 2.4 GHz of bandwidth in the downlink and 2 GHz of bandwidth in the uplink for high density fixed satellite services (HDFSS).

Hybrid satellite and terrestrial infrastructure for mobile broadcast services delivery: An outlook to the ‘Unlimited Mobile TV’ system performance

This paper provides an overview of a satellite-based Unlimited Mobile TV system implementing the recently defined Digital Video Broadcast-SH radio interface. It provides details on the system features and performances with respect to a typical dimensioning/deployment scenario. Copyright

Cognitive radio for Ka band satellite communications

The satellite communication data traffic is increasing dramatically over the coming years. High throughput multibeam satellite networks in Ka band are potentially able to accommodate the upcoming high data rate demands. However, there is only 500 MHz of exclusive band for download and the same amount for upload. This spectrum shortage impose a barrier in order to satisfy the increasing demands. Cognitive satellite communication in Ka band is considered in this paper in order to potentially provide an additional 4.4 GHz bandwidth for downlink and uplink fixed-satellite-services. In this way, it is expected that the problem of spectrum scarcity for future generation of satellite networks is alleviated to a great extent. The underlying scenarios and enabling techniques are discussed in detail, and finally we investigate the implementation issues related to the considered techniques.

Hybrid Satellite-Optical Ring Network for Regional Blackspots in Australia’s National Broadband Network

Satellite communications is the most prominent solution for covering remote areas for broadband Internet access where long and expensive cables are not feasible to be deployed. The Australia’s National Broadband Network (NBN) initiation ’delivering superfast broadband to Australian homes and workplaces’ currently face the problem of deploying long fibres to cover regional blackspots considering the geographic structure of the continent. Considering this we present some preliminary ideas to have hybrid satellite-optical broadband networks specifically covering the regional blackspots in Australia based on ring network topologies. We present topologies for the hybrid network and also architecture for the electronic (RF)-optical interface which enables to connect the fibre optical network to the satellites. Furthermore, topologies for the regional fibre optical networks in the blackspot regions are also presented in this paper.

Satellite radio interfaces compatible to 3GPP WCDMA system

This paper provides an overview of a technical study on the satellite radio interfaces based on 3GPP WCDMA system. First, the outcome of the technical study is introduced, which has been carried out by the Mobile Satellite System Working Group of the ETSI Satellite Earth Satellite Technical Committee (ETSI TC SES MSS). The study dealt with the configurations and performance of the 3GPP WCDMA (UTRAN) radio interface over a satellite link. Second, as an evolution of satellite-specific radio interface, the study results are addressed on the possible adaptations of WCDMA to the satellite link in order to maximize the radio link performance. The resultant outcome of the study was reflected in a detail on the G and C families of the satellite radio interface of the ITU-R Recommendation M.1457, respectively. Copyright

SatCom systems in the context of Future Internet-enabled smart infrastructures

This paper aims at forecasting the role of Satellite Communications (SatCom) in the context of Future Internet and particularly of the future Internet-enabled smart infrastructures in support of some European Societal Grand Challenges. It also aims at identifying the necessary technological enablers which need to be developed by the European SatCom industry for the emerging SatCom solutions.