Broadband satellite networks-the global IT bridge

A large scale interactive live teaching system over satellite and ground IP network

“…As we know, satellite uses broadcasting mode, its main merits are broadcasting (like sunshine) to cover wide area, steady or fixed bandwidth for real time multimedia transmission[3], but normally, it is very expensive to realize bi-direction communication, and the satellite user can only receive the program passiveIy [4]. For the ground IP network, although it can provide bi-direction communication and selfdetermination internet access service, it is too difficult or expensive to afford the large amount of users to receive teacher's live lecture online, moreover, ground network also suffers from its lower coverage and limited bandwidth, especially in village and towns.…”

A neural network MLSE receiver based on natural gradient descent: application to satellite communications

“…These satellite systems are developed to provide connectivity between remote terrestrial networks, direct network access, Internet services using fixed or mobile terminals, and high data rate transmissions [1,6]. In all these research and development scenarios, non-geostationary satellite networks are considered to provide satellite-based mobile multimedia services for their low propagation delay and low path loss [1,2,5,7,8].…”

A Neural Network MLSE Receiver Based on Natural Gradient Descent: Application to Satellite Communications

“…The satellite communications field is getting an enormous attention in the wake of third generation (3-G) and future fourth generation (4-G) mobile communication systems challenges [1,2]. Currently, when the telecommunications industries are planning to deploy the 3-G system worldwide and researchers are coming up with tons of new ideas for the next-generation wireless systems, a load of challenges are yet to be fulfilled.…”

“…These include high data rate transmissions, multimedia communications, seamless global roaming, quality of service (QoS) management, high user capacity, integration and compatibility between 4-G components, and so forth. To meet these challenges, presently researchers are focusing their attention in the satellite domain by considering it an integrated part of the so-called information superhighway [2,3,4,5]. As a result, a new generation of satellite communication systems is being developed to support multimedia and Internet-based applications.…”

“…These satellite systems are developed to provide connectivity between remote terrestrial networks, direct network access, Internet services using fixed or mobile terminals, and high data rate transmissions [1,6]. In all these research and development scenarios, non-geostationary satellite networks are considered to provide satellite-based mobile multimedia services for their low propagation delay and low path loss [1,2,5,7,8].…”