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An open ITS platform combining interactive satellite services with other communication channels is being developed and evaluated in field trials within the SafeTRIP project [1]. Prototyping and in-field validation of a novel waveform for messaging return channel over satellite for land mobile is an important objective of the project. The overall system architecture has recently been standardized by...
The stationarity of Land Mobile Satellite (LMS) channels is investigated. It is shown that the evaluation of the time-varying channel stationarity is essential before data processing for parameter extraction. This is illustrated by several examples using real-world datasets.
. The sputter yield is an important material parameter not only for various surface treatment techniques, but also for electric spacecraft propulsion. Many satellite or thruster components might be subject of erosion due to energetic and/or related secondary ions. In order to estimate the lifetime of these components the sputter yield under xenon ion incidence has to be known in dependence on ion...
Advanced communication and broadcasting systems use heavily diversity techniques to improve service availability. To analyze the performance of systems using techniques such as time diversity or time interleaving, antenna diversity and angle diversity, a detailed knowledge of the channel characteristics is essential. Especially the statistical analysis and the evaluation of the slow fading effect...
Future broadcasting to mobile services may consider satellite angle diversity to overcome fading propagation effects on the land mobile satellite (LMS) environment. For that reason, an experimental campaign for gathering relevant experimental data and improve angle diversity models has been carried out in the MILADY project. Its main focus is on the analysis of multi-satellite systems and the consolidation...
The satellite to indoor propagation channel in L- and S-band is becoming of significant importance because future satellite broadcast and navigation systems (as e.g. S-DMB and Galileo) are aiming at optimum performance in all kind of environments, i.e. even in indoor scenarios. In the framework of the EU FP6 project MAESTRO, Fraunhofer IIS has carried out measurements of the satellite to indoor coverage...
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