Evaluate the impacts on the capacity of a satellite network.
The purpose of this activity is to evaluate the impacts on the capacity of a satellite network thanks to the introduction of several techniques: 1. In a two-way interactive satellite network the overlay of coded interfering channel on an existing channel using interference cancellation at the receiver can lead to a substantial increase of the capacity (up to 100%) without affecting performance. Ideally the interfering channel should be stronger than the existing channel so that it can be detected and subtracted from the received signal. This leads to the power saturation of the satellite channel rather than to its bandwidth limitation. Adaptive Coding and Modulation (ACM) will be addressed to assess the benefits of avoiding the saturation of the transponder. 2. Destination cooperation in wireless systems has been demonstrated to improve SNR performance and thus to mitigate the edge of coverage issue. Sucha technique shall be evaluated in the case of a satellite network where two (or more) terminals will aid each other in detecting anoutbound channel by collaborating via an alternate satellite or terrestrial link. Each terminal using interference cancellation techniques will attempt to decode not only the information intended for it but also the data destined for the other terminal. This should improve SNR and expand the satellite beama s coverage. 3. Overlay channels destination cooperation and ACM techniques can alsobe combined to offer more flexibility in balancing bandwidth and power constraints. The specific operating point will be set dynamically by users based on their requirements for bandwidth and power efficiency. 4. Multi-User Detection (MUD) techniques can also beused to mitigate Co-Channel Interference (CCI) in multibeam satellite systems. MUD has been suggested for the return link of the DVB-RCS. Use of MUD and in particular interference cancellation will be investigated not only to combat CCI but also in combination with destination cooperation technique as a capacity enhancement technique for terminals located in beam boundaries. The activityshall implement as a minimum the following tasks (1) The definition of reference scenarios and metrics for the evaluation of the proposed techniques (2) The development of simulation models (3) The analytical and detailed review of the proposed techniques (4) Thesimulation of the proposed techniques and their assessment against the selected reference scenarios and tecniques (5) The identification of the impacts of the proposed techniques at system/architecture level (if any) or signalling level (if any) (6) The definition ofa roadmap for the corresponding technologies and products developments.
Price Range: 200-500 keuro
Closing Date: 11/07/2014
Tender documents : T22297290.html
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