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We study the limits of cooperative coverage extension for multicast transmission in heterogeneous machine to machine networks. Terminals are equipped with both a long range interface, through which they connect to, e.g., a cellular network or satellite system, and a short range interface, which is used to create an ad-hoc capillary network among the terminals. Such a network is intended to enhance...
The ever growing demand for broadband satellite services experienced in recent years has created new opportunities for high speed satellite communication systems and stimulated a rapid advancement in space and ground segment technologies. The multi-spot beam system architectures is one of the most effective solutions to satisfy the ever increasing users' requirements and their future evolution, allowing...
Current Ka-band, multi-media satellite systems employ spot beam technology to accommodate a wide range of multi-media type services. These satellites typically employ uniform allocation of RF power and bandwidth to spot beams. Since the traffic distribution tends to be highly asymmetrical and with a high degree of uncertainty, the satellite does not have sufficient flexibility to satisfy the traffic...
A key requirement for the future multi-beam broadband satellite design is the provision of flexibility to adapt to different traffic demands by re-assigning capacity to beams in accordance with changing traffic distributions. Such flexibility would enable the best match to be maintained between the system resources and traffic demands over the satellite lifetime, thereby greatly enhancing the system...
In this paper, the authors have introduced alternative approaches to the architectural design of adaptive beamforming system to allow for balancing the processing load between the ground and space segment while optimizing the system capacity and the overall system flexibility. The feasibility of such techniques for the next generation of mobile satellite systems is a subject of further study considering...
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