This paper presents results from analysis into the performance of Turbo Codes over the aeronautical satellite channel. Currently, only limited services (voice, fax, low rate data) are available for aeronautical travelers. A major constraint is the cost of providing an aircraft qualiied antenna with high gain. This limits the data transmission rates that can be supported. In the future, more pow...

This paper proposes a complete satellite access network solution for multimedia broadcast multicast service (MBMS) delivery based on the T-UMTS standards. Firstly, the benefits of MBMS delivery via satellite (SAT-MBMS) for both S/T-UMTS network operators are shown via market and business analysis. A new integrated S/T-UMTS architecture for MBMS delivery is then proposed featuring an intermediat...

In this paper we present a multi-criterion control simulation in a realistically complex environment of a satellite network, involving non-symmetric up and downlinks. Direct Broadcast Satellite (DBS) networks carrying heterogeneous traffic is characterized with challenges, such as high traffic burstiness, wireless channel dynamics, and large, but limited capacity. On the other hand, there are s...

The cellular basis for postnatal muscle growth and hypertrophy has been realized over the past several decades. Skeletal muscle is extremely responsive to environmental and physiological cues by modifying growth and functional characteristics in accordance with the demands placed on it. This ability extends to instances of injury or trauma, where skeletal muscle exhibits the capacity to regener...

The standardization of a Return Channel via Satellite and the satellite community efforts in term of interoperability over the last few years stands for major milestones in the development of reliable, efficient and low cost satellite equipments. It leads to quite a positive outcome: geostationary satellite networks are expected to play a decisive role in bridging the existing digital divide th...

We are delighted to bring to you this special issue on satellite communications, which we have prepared as part of the spreading of excellence remit of the satellite communications network of excellence (SatNEx). The SatNEx project, which began in 2004, is funded for five years under the Euro-pean Union's Sixth Framework Programme (FP6) Information Society Technologies (IST) Thematic Area. Led ...

This paper presents the simulation results of a satellite network based in the Digital Video Broadcast Standard for the outbound channel DVB-S and the return channel DVB-RCS for interactive satellite terminals called RCST. The network model was built under the Network Simulator NS and the main objective was to study the return channel DVB-RCS resource request mechanism and adaptation layer for ...

Geostationary satellite networks are currently considered as one of the most promising broadband access network technology for narrowing the digital divide. Though technically attractive and cost effective, the provisioning of endto-end QoS services in satellite access remains largely undefined. In order to bridge this gap, the European SATIP6 project defines a complete QoS architecture involvi...

In this paper, we present a system that models the land-mobile satellite communication channel with a Markov chain approach supported by images of the mobile Earth station’s (MES) environment. Our method employs a video camera with a fish-eye lens capturing image sequences of the user environment from the position of the moving MES, image and signal processing algorithms to recognize propagatio...