×ØÖÖ BLOCKINØ A channel coding system for strongly varying channels (mobile radio, Internet) unknown to the encoder is presented. It matches progressively coded sources (e.g., video, images, audio, speech) with convolutional codes of very high memory applying re-gressive redundancy over the data frame of the source. The channel decoder with scalable… (More)
In this paper, we examine different database synchronization/replication strategies and compare their suitability for satellite links in terms of latency and exchanged data volume. Earlier works have investigated the performance of these algorithms over terrestrial networks; however, the delay caused by a geostationary satellite has not been taken into… (More)
The main drawback of paper-based registration systems for organizing mass casualty incidents (MCIs) is that information about affected persons remains among the persons themselves. Data can be duplicated/aggregated by laborious manual copying triage tags only,a nd the normal medium for exchanging information are voice-based radio systems. Since MCIs… (More)
—Efficient emergency management requires on the one hand collecting distributed pieces of information in order to get an aggregated situation overview, and on the other hand distributing and presenting the gathered information to all levels of decision making. IT-supported emergency management systems can support these tasks, but need to be carefully… (More)
The authors examine two different non-geostationary satellite constellation networks with inter-satellite links for global air traffic control and air passenger communication. After developing a traffic model for aeronautical communication services, the authors derive bandwidth requirements for such a global system. The influence of different routing… (More)
We present a new channel coding system which combines error detection and error correction using a single high-memory convo-lutional code, i.e., no dedicated error detection code is required. Since the state complexity of high-memory convolutional codes makes maximum-likelihood decoding impractical, a modified sequential decoder –the Far End Error Decoder… (More)
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… (More)
Die Anforderungen an Anwendungen für IT-gestütztes Management eines Massenanfall vonV erletzten (MANV) sind vielfältig.